content
string
quality_label
int64
meta
string
all-MiniLM-L6-v2_embedding
list
doc_id
int64
unique_id
string
Matrix Eigenvectors May 16th 2007, 09:23 AM #1 Newbie Joined May 2007 Posts 4 Matrix Eigenvectors Hi just wondering if anybody could help me with a problem i've can't see to solve! I can work out the Eigenvalues fine Matrix A = [ 2 -1 -1 1 ] Ax = Lx L = lamda | [A-LI] | = 0 (...
5
[ 0.025390625, -0.04638671875, -0.00457763671875, -0.068359375, 0.0169677734375, 0.014404296875, -0.0147705078125, -0.03515625, -0.06640625, 0.0262451171875, 0.08349609375, -0.1064453125, 0.007110595703125, -0.036865234375, -0.02880859375, 0.0169677734375, -0.059814453125, -0.0830078...
37,300
37300
Mapping multivariate polynomial inequalities system to subspace up vote 1 down vote favorite What I will ask, more than a solution, is better mathematical definition of my problem and directions to find the solution. I have a set of linear equations, e.g.: d_1 &= L_1 - 9\,m_1 - 9\,m_2 \\ d_2 &= x_1 + 3\,m_1 + 3\,m_2...
4
[ 0.01470947265625, -0.08154296875, 0.00176239013671875, -0.1298828125, 0.030029296875, 0.0419921875, -0.059326171875, 0.0225830078125, -0.125, 0.0186767578125, 0.0400390625, -0.048095703125, 0.05712890625, -0.0361328125, -0.046630859375, 0.11279296875, -0.0027313232421875, 0.0144653...
37,301
37301
division of line segment A line passes through A(1,1) , B(4,3). Find the coordinates of the point on the line which is (1) three times as far from A as from B, (2) three times as far from B as from A. Treat the coordinates, x from 1 to 4 and y from 1 to 3, separately. "Three times as far from A as from B". Think of th...
4
[ -0.034423828125, -0.0166015625, -0.042724609375, -0.130859375, 0.00848388671875, 0.0086669921875, 0.04541015625, 0.01165771484375, 0.028076171875, -0.1015625, 0.0179443359375, -0.052978515625, 0.0238037109375, 0.045166015625, -0.0303955078125, 0.05029296875, -0.07373046875, -0.0031...
37,302
37302
Coprimes in Fermat's Last Theorem Date: 06/03/99 at 07:07:38 From: oliver Subject: Coprime in Fermat's Theorem n = 2 Hi! I was wondering, in Fermat's Conjecture of n = 2 x^2 + y^2 = z^2 which can be rearranged to: (y/2)^2 = (z-x)/2 * (z+x)/2 (z-x)/2 and (z+x)/2 are coprime? I have done s...
4
[ -0.1123046875, 0.004913330078125, -0.044921875, 0.0751953125, 0.07958984375, 0.01226806640625, 0.0240478515625, 0.091796875, -0.062255859375, -0.0142822265625, -0.0218505859375, 0.08349609375, -0.04931640625, 0.052734375, -0.032470703125, 0.01007080078125, 0.0037841796875, -0.00787...
37,303
37303
Finding zeros of a polynomial June 25th 2012, 03:06 PM daigo Finding zeros of a polynomial 12x^4 - 9x^3 - 58x^2 + 4x + 36 Is the only way to find the zeros of any given polynomial to guess and check or is there a more mechanical method like the quadratic formula that works on every single polynomial? P...
5
[ -0.0004138946533203125, 0.059326171875, -0.044677734375, 0.004302978515625, -0.05126953125, 0.045654296875, -0.00135040283203125, 0.01336669921875, 0.00927734375, 0.0155029296875, -0.0296630859375, 0.0274658203125, 0.01092529296875, 0.0771484375, -0.0023193359375, 0.019775390625, -0....
37,304
37304
Minimizing the Length of a Crease Date: 11/11/1999 at 13:54:30 From: Jessica J. Johnston Subject: Minimize the value of L This is the exact problem in the book: A rectangular sheet of 8.5 x 11-in. paper is placed on a flat surface, and one of the corners is lifted up and placed on the opposite longer edge. With all...
4
[ 0.012939453125, 0.1015625, 0.1142578125, -0.00848388671875, 0.046875, 0.0771484375, -0.0172119140625, 0.123046875, -0.046630859375, 0.00994873046875, 0.0123291015625, 0.03759765625, 0.012939453125, 0.0291748046875, -0.064453125, 0.07275390625, -0.03271484375, -0.0020751953125, -0...
37,305
37305
3D Trig. Probs February 15th 2008, 09:31 PM #1 Newbie Joined Feb 2007 From Australia Posts 20 3D Trig. Probs g&t homework, pleasse help draw the diagrams first thanks. 1. the pilot of an aircraft flying due South, at an altitude of 750m, sees an airfield directly ahead, angle of depression 1...
4
[ -0.004791259765625, 0.08203125, -0.03662109375, -0.02294921875, 0.044189453125, 0.054931640625, -0.042236328125, 0.1142578125, -0.10205078125, 0.0703125, 0.03857421875, -0.07568359375, -0.0274658203125, 0.06494140625, 0.0225830078125, 0.06494140625, -0.1259765625, 0.023193359375, ...
37,306
37306
Conversion Decimal to Floating-Point Conversions The Conversion Procedure The rules for converting a decimal number into floating point are as follows: 1. Convert the absolute value of the number to binary, perhaps with a fractional part after the binary point. This can be done by converting the integral and f...
5
[ 0.027099609375, 0.08056640625, -0.09521484375, -0.07373046875, -0.039306640625, -0.10400390625, -0.0224609375, 0.041748046875, -0.0654296875, 0.0220947265625, -0.02587890625, -0.10009765625, 0.05078125, 0.06787109375, -0.035888671875, -0.03173828125, -0.107421875, 0.10595703125, ...
37,307
37307
Finding Equation for a Function given table of value January 7th 2013, 03:22 PM #1 Newbie Joined Jan 2013 From New York City Posts 2 Finding Equation for a Function given table of value I am given a table of values x | y ------ -3|91 -2| 21 -1|3 0 |1 1 |3 2 |21 3 ...
4
[ -0.0296630859375, -0.012939453125, -0.017822265625, -0.041748046875, -0.046875, 0.057373046875, 0.06494140625, 0.041015625, -0.00081634521484375, 0.02587890625, 0.048828125, -0.0712890625, 0.0162353515625, 0.07958984375, 0.0286865234375, -0.01055908203125, -0.099609375, -0.07373046...
37,308
37308
[SOLVED] Find a volume June 12th 2009, 02:05 PM arbolis [SOLVED] Find a volume Find the volume inside the sphere $x^2+y^2+z^2=4a^2$ and outside the cylinder $x^2+y^2=2ax$. My attempt : I visualized the volume I must calculate. I can first calculate the volume of the sphere ( $\frac{32\pi a^3}{3}$ ) and then ...
5
[ 0.0296630859375, 0.007476806640625, -0.00982666015625, -0.087890625, 0.0267333984375, -0.047607421875, -0.0732421875, 0.064453125, 0.0673828125, 0.0072021484375, -0.037353515625, 0.08447265625, -0.0169677734375, 0.03857421875, -0.0299072265625, 0.014404296875, 0.007049560546875, 0....
37,309
37309
Optimizing time April 4th 2011, 11:25 AM #1 Junior Member Joined Apr 2011 Posts 56 Optimizing time I learned optimization (distance) but I missed the lesson on optimizing time so I'm having some trouble on this question: A sailor in a boat 8 km offshore wants to reach a point on shore that is 10 km ...
5
[ 0.017578125, 0.03662109375, 0.004669189453125, -0.029541015625, 0.0169677734375, 0.0216064453125, -0.046142578125, 0.06884765625, -0.068359375, -0.0091552734375, 0.038818359375, -0.0103759765625, -0.0289306640625, 0.04638671875, -0.041259765625, 0.1513671875, 0.02685546875, 0.02612...
37,310
37310
Column rank, linear independence and RRE form April 10th 2010, 10:51 PM #1 Member Joined Mar 2009 From Gold Coast, Queensland, Australia Posts 105 Column rank, linear independence and RRE form if I have a matrix A like this: A = $\left[\begin{matrix}1 & 1 & 0 & 0 & 1 & 0 & 0\\1 & 1 & 0 & 0 & 0 &...
4
[ -0.0194091796875, -0.0224609375, -0.1005859375, -0.04345703125, 0.046630859375, -0.0023956298828125, 0.009765625, -0.04345703125, -0.034912109375, 0.06591796875, 0.055419921875, -0.054443359375, 0.08251953125, 0.04296875, -0.056640625, -0.0235595703125, -0.103515625, -0.1005859375,...
37,311
37311
Factorising December 21st 2007, 07:11 AM #1 Newbie Joined Dec 2007 From U.K Posts 21 hi, just wondering if anyone can give me any help with this maths equation: X2-6x+9=0 6x2+x-15=0 i have tried to wrk this equation out but un-sure thanks jenko! For the first one: $(x+a)(x+...
4
[ -0.07177734375, -0.005889892578125, 0.03369140625, 0.03515625, 0.044921875, 0.130859375, -0.028564453125, -0.0341796875, -0.034912109375, -0.037353515625, 0.050537109375, -0.07275390625, -0.00152587890625, -0.01104736328125, -0.0035858154296875, 0.08056640625, -0.0247802734375, 0.0...
37,312
37312
Solution behind a card trick? March 23rd 2008, 07:19 PM jacquir Solution behind a card trick? I just saw a new card trick tonight and I'm sure there's a mathematical solution to it....just wondering if anyone out there has seen it before. The trick goes like this: 1. Start with a 52-deck of cards 2. Fl...
4
[ -0.048828125, 0.0419921875, -0.0068359375, -0.050048828125, -0.03564453125, -0.026123046875, -0.0078125, 0.03173828125, 0.047607421875, -0.0072021484375, -0.08984375, -0.0072021484375, -0.060791015625, -0.000659942626953125, -0.02880859375, 0.00665283203125, -0.087890625, 0.0756835...
37,313
37313
Mathematical Induction Proof: P(n): (1^3)+(2^3)+...+(n^3)=(1+2+...+n)^2 for all n January 29th 2013, 04:11 PM #1 Member Joined Oct 2010 Posts 150 Mathematical Induction Proof: P(n): (1^3)+(2^3)+...+(n^3)=(1+2+...+n)^2 for all n Prove: P(n): (1^3)+(2^3)+...+(n^3)=(1+2+...+n)^2 for all natural numbers n ...
4
[ -0.051025390625, 0.05615234375, 0.00494384765625, 0.0732421875, -0.0198974609375, -0.01544189453125, 0.051513671875, -0.0703125, 0.04931640625, -0.01416015625, -0.140625, 0.00750732421875, 0.031494140625, 0.0036163330078125, 0.0107421875, -0.0191650390625, -0.0419921875, 0.08056640...
37,314
37314
YouTube lesson about precalculus wrong? May 8th 2009, 02:29 PM Phire YouTube lesson about precalculus wrong? YouTube - Precalculus: The Essentials that Students Seem to Forget It starts at 5:29. Basically, what he is saying is that: $x^{\frac{1}{3}} + x^{\frac{1}{2}} - 7 = 0$ He's says that you ca...
4
[ -0.0234375, -0.04443359375, -0.01708984375, 0.10986328125, 0.01348876953125, -0.054931640625, -0.0242919921875, -0.064453125, 0.060791015625, 0.03173828125, 0.0556640625, -0.0189208984375, 0.031494140625, 0.07470703125, 0.04638671875, 0.003997802734375, -0.1396484375, 0.0693359375,...
37,315
37315
Calc Word problem February 12th 2011, 06:11 PM agent2421 Calc Word problem Can someone please help me out. Suppose a car is moving along straight road and distanct traveled t hours after starting from rest is given by f (t) = 2t^2+60t. Find the avg velocity of the car over the time intervals (0,2) and (...
4
[ -0.02099609375, 0.0284423828125, 0.06640625, 0.019775390625, 0.0228271484375, 0.056396484375, -0.01434326171875, 0.0888671875, -0.045654296875, -0.00067901611328125, 0.0556640625, -0.08203125, 0.0341796875, -0.0361328125, -0.055419921875, 0.0206298828125, -0.0634765625, -0.04199218...
37,316
37316
first order non-linear differential equation February 2nd 2011, 02:12 PM Empty first order non-linear differential equation I am trying to solve this differential equation and I can't get started and was wondering if I could get some help with a kick start: $(\frac{dy}{dx})^2 +(\frac{dy}{dx})*x-\frac{dy}{dx...
5
[ -0.0810546875, -0.0869140625, 0.080078125, 0.021484375, -0.04931640625, 0.025634765625, -0.06298828125, -0.039794921875, 0.020751953125, 0.037353515625, 0.1337890625, 0.060791015625, -0.0194091796875, 0.0113525390625, -0.0546875, 0.06640625, 0.043701171875, -0.06640625, 0.0400390...
37,317
37317
finding the equation that relates to set of two numbers October 7th 2009, 09:18 PM #1 Newbie Joined Oct 2009 Posts 1 finding the equation that relates to set of two numbers can someone help me find the equation that relates to these sets of paired numbers and plz explain the method used 0 - 2 1 ...
4
[ -0.04833984375, -0.01190185546875, -0.041259765625, -0.0225830078125, 0.003143310546875, 0.1220703125, 0.00933837890625, 0.107421875, -0.058837890625, -0.044677734375, 0.0301513671875, -0.044677734375, 0.0546875, -0.0289306640625, 0.01055908203125, 0.1298828125, -0.037841796875, -0...
37,318
37318
Topology question March 1st 2010, 01:23 PM #1 Super Member Joined Aug 2009 From Israel Posts 976 Topology question Hi, I would appreciate some guiding with this question. Thanks. Let X be some topological space and Y a compact, Hausdorff topological space. Let $f:X \to Y$ and define $\Gamma_f =...
5
[ -0.004547119140625, -0.049560546875, -0.0673828125, -0.06494140625, -0.01434326171875, 0.10595703125, 0.1669921875, 0.08984375, -0.0654296875, 0.005859375, 0.03857421875, 0.056640625, 0.0228271484375, 0.0213623046875, 0.05908203125, 0.11181640625, 0.0050048828125, -0.0283203125, ...
37,319
37319
slight extension to classification of finitely generated abelian groups up vote 3 down vote favorite 1 Is there a classification theorem for "finitely generated abelian groups with a distinguished element"? If it helps, you can restrict this to the cases where the order of each element divides the order of the disting...
4
[ -0.1416015625, 0.011474609375, -0.021728515625, 0.040771484375, 0.0038909912109375, -0.06298828125, -0.0306396484375, -0.11328125, 0.0067138671875, -0.0211181640625, 0.0177001953125, -0.050537109375, 0.04052734375, -0.0177001953125, -0.03857421875, -0.00104522705078125, -0.0285644531...
37,320
37320
Math Help Prove that a congruent b(modn) if and only if a^2 + b^2 congruent 2ab(mod n^2) Help please $a \equiv b(mod n) \Leftrightarrow a^2 + b^2 \equiv 2ab (mod n)$ let's take first $\Rightarrow$ we have $a \equiv b (mod n)$ want the right side $a \equiv b (mod n )$ this mean $n \mid a-b$ and this mean there exist a...
4
[ -0.0537109375, 0.0703125, 0.01361083984375, 0.0123291015625, -0.013916015625, 0.0361328125, 0.03564453125, -0.00738525390625, 0.048828125, -0.158203125, 0.0191650390625, 0.031494140625, 0.034423828125, 0.01251220703125, 0.006805419921875, -0.017822265625, 0.052001953125, -0.0296630...
37,321
37321
The integral.... Do the inside integral, aka the y integral, first: Int[(4x + 2)dy, x^2, 2x] = [(4x + 2)y, x^2, 2x] <-- x is a constant for the y integral = (4x + 2)*2x - (4x + 2)*x^2 = 8x^2 + 4x - 4x^3 - 2x^2 = -4x^ 3 + 6x^2 + 4x Now do the outside integral, aka the x integral: Int[(-4x^3 + 6x^2 + 4x)dx, 0, 2] = [-4*(...
5
[ 0.035888671875, 0.005401611328125, 0.01226806640625, -0.048828125, 0.049072265625, -0.06787109375, -0.0654296875, 0.06494140625, -0.023681640625, -0.06396484375, 0.0380859375, -0.036376953125, -0.007293701171875, -0.053466796875, -0.04248046875, -0.000873565673828125, -0.021240234375...
37,322
37322
Collinearity Questions: What is collinearity? Why is it a problem? How do I know if I've got it? What can I do about it? Materials...
4
[ 0.0284423828125, -0.05859375, -0.022216796875, 0.07763671875, 0.01953125, 0.00909423828125, -0.03173828125, -0.03173828125, 0.0206298828125, 0.01043701171875, 0.0208740234375, -0.031005859375, 0.035888671875, 0.01129150390625, -0.054443359375, -0.014404296875, -0.004638671875, -0.0...
37,323
37323
The Ambiguous Case Date: 04/01/2003 at 13:38:38 From: Les Subject: The Ambiguous Case I do not understand how to use the ambiguous case to determine the number of triangles that can be constructed. Is there a simple way to answer the following question: How many triangles can be constructed if, for example, a=4, A=3...
4
[ -0.055908203125, 0.06689453125, -0.049072265625, -0.011474609375, -0.019287109375, 0.003326416015625, 0.00860595703125, -0.014892578125, 0.03564453125, 0.01324462890625, 0.0220947265625, -0.11083984375, -0.0245361328125, 0.0478515625, 0.09326171875, -0.03759765625, -0.0927734375, -...
37,324
37324
Simplify using the exponent laws #2 September 6th 2012, 10:52 AM #1 Junior Member Joined Aug 2012 From Winnipeg Posts 57 Simplify using the exponent laws #2 Hi guys, the task: Simplify using the exponent laws. Write the final answer using only positive exponents. Evaluate where possible. 1....
4
[ -0.00946044921875, -0.0130615234375, 0.037109375, -0.0074462890625, 0.04296875, -0.1103515625, 0.000025987625122070312, -0.01312255859375, 0.006622314453125, -0.0033721923828125, 0.01116943359375, 0.0068359375, 0.01495361328125, 0.1328125, 0.058837890625, 0.154296875, -0.015991210937...
37,325
37325
exponential word problem Can someone please help me with part b and c. to a) Plug in D = 10 and t = 5. Use a calculator. I've got $x \approx 5.353\ \rm{mg}$ to b) Now D = 10 + 5.353 and t = 1. Use a calculator. I've got $x \approx 13.54897\ \rm{mg}$ to c) Solve the equation for t: $3 = 15.353\cdot e^{-\frac18 t}~\impl...
4
[ -0.029052734375, 0.034912109375, 0.05078125, -0.072265625, -0.032470703125, -0.111328125, 0.080078125, 0.091796875, 0.0537109375, 0.09228515625, 0.0830078125, -0.103515625, 0.03857421875, 0.09228515625, 0.0277099609375, -0.03515625, 0.0133056640625, -0.0038909912109375, -0.100585...
37,326
37326
SA and volume of half a sphere? May 20th 2006, 12:46 AM #1 Newbie Joined Apr 2006 Posts 8 SA and volume of half a sphere? Hello, I need help with volume and surface areas of half a sphere (hemispheres) I know that v= 4/3x pi x r cubed SA= 4x pi x r squared However, when I do this for hal...
4
[ 0.1015625, -0.0162353515625, 0.017578125, -0.0247802734375, 0.03125, -0.016357421875, -0.0595703125, 0.05224609375, 0.05712890625, 0.051025390625, -0.038818359375, 0.0302734375, 0.0223388671875, 0.01287841796875, 0.042236328125, -0.078125, 0.01287841796875, -0.00347900390625, -0....
37,327
37327
finding a function So here's my problem: Given $f\prime\prime(x)=-9sin(3x)$ $f\prime(0)=-4$ and $f(0)=-1$ Find $f(\frac{\pi}{2})=$ Any suggestions are greatly appreciated. $f'(x) = \int f''(x)\ dx = \int -9\sin{(3x)}\ dx = 3\cos{(3x)} + C$ $f'(0) = -4 \implies 3\cos{(3\cdot 0)} + C = -4 \implies 3 + C = -4 \implies C ...
5
[ -0.037353515625, -0.053955078125, -0.006011962890625, 0.013671875, -0.060302734375, 0.08837890625, -0.053466796875, 0.08935546875, -0.041748046875, 0.054931640625, 0.07958984375, -0.146484375, 0.007568359375, 0.0021209716796875, -0.0242919921875, -0.072265625, -0.046875, 0.05371093...
37,328
37328
Statistics Lab 4 - Z-Score, Raw Score, Probability Formulas Hi, Today you will: So How'd You Do On The Test? In high school your teachers graded your tests and placed a grade on the top, or, placed a fraction on the paper to indicate how well you'd performed. That fraction is on your paper. Find the fraction with a ...
5
[ -0.001678466796875, 0.09033203125, 0.032958984375, 0.01092529296875, -0.01092529296875, -0.072265625, -0.036376953125, 0.10205078125, -0.02392578125, 0.0947265625, 0.05419921875, 0.00225830078125, 0.07861328125, 0.041015625, -0.01123046875, -0.036376953125, 0.078125, 0.017578125, ...
37,329
37329
POW card counting game August 21st 2013, 11:30 AM nofeynmanme POW card counting game Hello all. Please forgive me if I do not post in accurate mathematical language. My last math was a beginning calculus course in 1979. My first dilemma is whether to post irrelevant background. I shall do so. Please skip to ...
5
[ -0.0228271484375, 0.1328125, -0.08837890625, -0.004150390625, -0.04150390625, 0.02685546875, 0.03466796875, -0.00946044921875, 0.02294921875, -0.00994873046875, 0.032958984375, 0.00653076171875, -0.00909423828125, 0.033935546875, 0.0289306640625, 0.01495361328125, -0.01275634765625, ...
37,330
37330
Asymptotic series for roots of polynomials up vote 4 down vote favorite 3 Let $f(z) = z + z^2 + z^3$. Then for large $n$, $f(z) = n$ has a real solution near $n^{1/3}$, which we call $r(n)$. This appears to have an asymptotic series in descending powers of $n^{1/3}$, which begins $$ r(n) = n^{1/3} - {1 \over 3} - {2 \...
5
[ -0.09375, -0.0220947265625, -0.09423828125, 0.1328125, -0.0284423828125, -0.07177734375, -0.04638671875, 0.02294921875, 0.10302734375, -0.049072265625, -0.0322265625, 0.04638671875, 0.0166015625, 0.0162353515625, 0.0155029296875, -0.033203125, -0.0262451171875, -0.01361083984375, ...
37,331
37331
Which Measure of Average is the Best to Use? Date: 08/17/2006 at 04:54:22 From: brian Subject: Finding AVERAGE of internet bandwidth speed I have collected over 120 observations of broadband internet connection speeds achieved through my service provider. The values range from 5 kilobits per sec. to 256 kbps. I nee...
4
[ 0.032470703125, 0.0255126953125, 0.03466796875, -0.033447265625, -0.07958984375, -0.007171630859375, -0.025390625, 0.078125, 0.002044677734375, 0.02783203125, -0.017333984375, -0.054443359375, -0.00909423828125, -0.013671875, 0.006072998046875, -0.0123291015625, 0.06640625, -0.0181...
37,332
37332
Help with proof, Given 0<n<m, show that there exists some t, n≤t<m, so that m-n divid July 4th 2011, 09:04 AM scruz10 Help with proof, Given 0<n<m, show that there exists some t, n≤t<m, so that m-n divid Given 0<n<m, show that there exists some t, n≤t<m, so that m-n divides t. Please help! Thanks! I sta...
4
[ -0.08203125, 0.10205078125, 0.00927734375, -0.02978515625, 0.034912109375, 0.126953125, 0.0498046875, 0.06396484375, -0.0004711151123046875, 0.00543212890625, -0.0181884765625, 0.0189208984375, 0.046630859375, 0.057861328125, 0.0179443359375, 0.01129150390625, 0.07275390625, -0.050...
37,333
37333
Math Forum Discussions Math Forum Ask Dr. Math Discussions Internet Newsletter MathTools Teacher2Teacher Teacher Exchange Workshops Search All of the Math Forum: Views expressed in these public forums are not endorsed by Drexel University or The Math Forum. Topic: Computation of the matrix exponential Replies: 6 L...
4
[ -0.0732421875, 0.0211181640625, -0.107421875, -0.016845703125, -0.0299072265625, -0.07470703125, 0.035888671875, -0.11865234375, 0.0537109375, 0.0625, 0.115234375, -0.0673828125, -0.01446533203125, 0.0030364990234375, 0.06787109375, 0.0238037109375, -0.083984375, 0.058837890625, ...
37,334
37334
Help putting system of equations into Reduced Row Echelon Form? August 31st 2011, 05:38 AM #1 Newbie Joined Aug 2011 Posts 3 I am having a lot of trouble solving systems of equations by putting them in RREF. I don't understand how you know what to do after each step. I keep working the same problem a...
4
[ -0.1025390625, -0.042236328125, -0.05810546875, -0.018798828125, 0.07958984375, 0.036865234375, -0.0299072265625, -0.0712890625, -0.0732421875, 0.07568359375, -0.01324462890625, -0.036376953125, 0.064453125, -0.004150390625, -0.01287841796875, 0.04443359375, -0.10546875, 0.01806640...
37,335
37335
Fraction Equalities October 20th 2009, 06:48 PM nmbala Fraction Equalities I am working on a class project on the derivation of the quadratic formula, and i understand the process of completing the square, up until the very last process of simplifying back to the quadratic forumla... Can someone explain...
4
[ -0.06005859375, -0.0172119140625, 0.05126953125, 0.01611328125, -0.052734375, 0.03173828125, -0.15625, 0.016357421875, 0.0732421875, -0.03173828125, 0.04541015625, 0.005126953125, 0.0189208984375, 0.000812530517578125, -0.0286865234375, 0.11572265625, 0.05078125, -0.0089111328125, ...
37,336
37336
Natural log and smallest number 1. November 1st 2012, 06:19 PM #1 2. November 1st 2012, 06:30 PM #2 Re: Natural log and smallest number Hey Eraser147. Try undoing the transformations. You can apply an inverse cosine to get the possible solutions (and use the fact that cos is periodic). ...
5
[ -0.04248046875, 0.0703125, 0.01287841796875, 0.054931640625, -0.0025787353515625, -0.01531982421875, 0.046142578125, 0.1103515625, 0.050048828125, 0.0026702880859375, 0.02392578125, -0.11767578125, 0.02099609375, 0.0208740234375, 0.0206298828125, -0.12060546875, -0.0439453125, -0.0...
37,337
37337
Lagrange Multipliers Date: 01/28/2001 at 04:56:22 From: li Subject: Lagrange Multipliers The temperature of a point(x,y,z) on the unit sphere is given by T(x,y,z)=xy+yz. Using Lagrange multipliers, find the temperature of the hottest point on the sphere. Date: 01/28/2001 at 06:03:18 From: Doctor Mitteldorf Subject...
5
[ -0.003204345703125, 0.001312255859375, -0.017333984375, -0.041015625, -0.01373291015625, -0.031982421875, 0.017333984375, -0.0169677734375, -0.064453125, 0.0634765625, -0.056640625, 0.03857421875, 0.08349609375, 0.0196533203125, -0.00494384765625, 0.004608154296875, 0.015869140625, ...
37,338
37338
Polynomial Rings over Fields December 31st 2012, 06:54 PM #1 Polynomial Rings over Fields Let F be a field. Let f(x) be a polynomial in F[x]. Prove that F[x]/(f(x)) is a field if and only if f(x) is irreducible. Would appreciate help with this problem. Peter Re: Polynomial Rings over Fields ...
5
[ 0.0205078125, 0.0634765625, -0.039306640625, -0.039794921875, 0.00408935546875, -0.056396484375, 0.10986328125, -0.01446533203125, 0.01068115234375, -0.052734375, -0.051513671875, 0.00099945068359375, 0.054443359375, 0.0301513671875, -0.036865234375, 0.0218505859375, 0.04443359375, ...
37,339
37339
June Some interesting facts • There are 2n non-perfect square numbers between the squares of two consecutive natural numbers n and (n+1) e.g. between 2^2 and 3^2 , there are 2 x 2 = 4 , non-perfect square numbers. • The square number of an odd natural number n , can be expressed as the sum of two consecutive na...
4
[ -0.08349609375, 0.03857421875, 0.00909423828125, -0.0074462890625, -0.030517578125, 0.026611328125, -0.046142578125, 0.01190185546875, 0.009033203125, -0.0458984375, -0.047607421875, 0.003387451171875, -0.0308837890625, -0.00006818771362304688, -0.00482177734375, -0.044189453125, -0....
37,340
37340
Gases #1 October 4th 2009, 10:47 AM jsu03 Gases #1 Can someone please help me with this problem? Thanks a lot! One mole of nitrogen and one mole of neon are combined in a closed container at STP. How big is the container? I did PV=nRT and V= nRT/P so V= ?(0.08206)(273)/1 atm... so I need to find n...
4
[ -0.0150146484375, 0.059326171875, -0.020263671875, 0.06201171875, 0.07177734375, 0.036376953125, 0.060791015625, 0.036376953125, -0.0224609375, -0.019775390625, -0.06591796875, -0.01434326171875, -0.06494140625, 0.020263671875, 0.017822265625, -0.0771484375, 0.01312255859375, 0.008...
37,341
37341
Finding area between two graphs March 23rd 2012, 01:23 PM makeupgirl1107 Finding area between two graphs Consider the area between the graphs http://math.webwork.rochester.edu:80...9866f8d281.png and http://math.webwork.rochester.edu:80...7b15d68f41.png I know how to do this problem by doing it as a sum of ...
4
[ 0.0302734375, -0.0286865234375, 0.0284423828125, -0.0302734375, 0.0244140625, -0.08935546875, -0.051025390625, 0.08203125, -0.11181640625, -0.05712890625, -0.03515625, 0.0201416015625, -0.0093994140625, 0.07666015625, 0.054931640625, 0.068359375, -0.0400390625, -0.0196533203125, ...
37,342
37342
Exact short sequences of vector spaces up vote 6 down vote favorite 3 If possible, how could one prove that every short exact sequence $0 \to A \xrightarrow f B \xrightarrow g C \to 0$ of vector spaces (here $A$, $B$ and $C$) splits without using any basis of $A$, $B$ or $C$. I was not able to exhibit a morphism $h \c...
4
[ -0.07763671875, 0.041748046875, 0.0361328125, -0.01513671875, 0.037109375, 0.12109375, 0.01318359375, -0.003936767578125, 0.0458984375, -0.07421875, 0.00689697265625, -0.056640625, 0.004638671875, -0.0294189453125, 0.036376953125, 0.0235595703125, -0.0732421875, 0.004791259765625, ...
37,343
37343
Inverse function on definite integral October 20th 2010, 08:03 AM nvwxgn Inverse function on definite integral The function $\displaystyle f$ and its inverse $\displaystyle f^{-1}$ are continuous. If $\displaystyle f(0) = 0$, find $\displaystyle\int^5_0 f(x)\ dx + \int^{f(5)}_0 f^{-1}(t)\ dt$ I really have ...
5
[ -0.032958984375, -0.005950927734375, 0.1015625, 0.03466796875, 0.0595703125, -0.1083984375, 0.035888671875, 0.08447265625, -0.0634765625, 0.0634765625, 0.00038909912109375, 0.060302734375, 0.0186767578125, 0.04150390625, -0.0634765625, 0.07373046875, -0.03369140625, -0.0810546875, ...
37,344
37344
Trig equation help please! April 8th 2014, 01:41 AM #1 Newbie Joined Apr 2014 From United Kingdom Posts 17 Trig equation help please! I think I'm having a massive blonde moment... How would I begin? edit: also this question: Here's my working so far: $\frac{1+\frac{sin^2x}{cos...
4
[ -0.049560546875, 0.0322265625, 0.056884765625, 0.0302734375, -0.02392578125, 0.000957489013671875, 0.006805419921875, -0.08251953125, -0.019287109375, 0.03564453125, 0.06298828125, -0.06298828125, 0.016845703125, 0.09228515625, -0.03466796875, 0.061767578125, 0.032958984375, 0.0142...
37,345
37345
Tricky Integral November 11th 2010, 05:51 AM #1 Member Joined May 2008 Posts 106 Tricky Integral Hi I'm doing a question to find the pressure of a gas made of massless bosons. I've done everything else and now the question has resulted in me needing to evaluate this integral $\int_{0}^{\infty}\frac{z...
5
[ -0.0498046875, 0.10791015625, 0.0123291015625, 0.03369140625, 0.1328125, -0.04443359375, 0.0269775390625, 0.0240478515625, -0.07568359375, -0.0152587890625, -0.022705078125, -0.05810546875, 0.039306640625, 0.0322265625, -0.06982421875, -0.0247802734375, 0.05810546875, -0.0458984375...
37,346
37346
Connected tanks. February 13th 2011, 05:33 AM #1 Newbie Joined Feb 2011 Posts 2 Connected tanks. I have had this problem for a week now. I do not even know where to begin. You have 26 tanks of water. 1 giant tank that holds a maximum of 27million L 25 smaller tanks that hold a maximum of 130...
5
[ 0.0038299560546875, 0.013916015625, -0.056396484375, -0.037841796875, 0.0002689361572265625, -0.111328125, -0.0498046875, 0.034912109375, -0.0274658203125, -0.025634765625, -0.04833984375, 0.00244140625, 0.0218505859375, 0.08984375, -0.05322265625, 0.032470703125, -0.043701171875, ...
37,347
37347
A small problem about primes number June 25th 2009, 07:52 PM #1 Newbie Joined Jun 2009 Posts 9 A small problem about primes number Conjecture. Does there exist a real number C such that for all i in N: tan(p_i)+cot(p_(i+1)) > 0 or tan(p_i)+cot(p_(i+1)) < C, where C = -0.14627836... If th...
4
[ -0.1298828125, 0.0250244140625, 0.029052734375, 0.05322265625, 0.018798828125, 0.099609375, 0.0947265625, 0.08203125, 0.01422119140625, 0.0458984375, -0.04296875, -0.03076171875, -0.0751953125, 0.01092529296875, 0.014892578125, -0.12890625, -0.00927734375, -0.0419921875, 0.013244...
37,348
37348
Math Help August 21st 2009, 10:54 AM #1 Newbie Joined Aug 2009 From United Kingdom Posts 17 Expanding Hello, Could somebody please help me expand the following, going into detail please as I'd like to learn how: 1) (a+b)^6 2) (1-x)^8 Regards, Recall Pascal's Triangle: ...
4
[ -0.06396484375, 0.0086669921875, -0.045654296875, 0.048095703125, -0.04052734375, 0.0206298828125, -0.01019287109375, -0.0634765625, -0.032470703125, 0.0634765625, -0.0380859375, -0.0113525390625, -0.032958984375, -0.06494140625, 0.055908203125, 0.1220703125, -0.09521484375, -0.021...
37,349
37349
How To Solve Geometry Problems? Top Geometrical problems in mathematics are basically those which are related to geometrical shapes like Triangles, circles, quadrilaterals etc. To solve these problems we have well – defined theorems and formulas. Let us see how to solve Geometry problems with the help of examples. Ex...
4
[ -0.03759765625, 0.1416015625, -0.0001544952392578125, 0.0390625, -0.03466796875, -0.0147705078125, 0.04638671875, 0.01373291015625, 0.00020313262939453125, 0.0177001953125, 0.08642578125, -0.1015625, 0.07666015625, 0.1015625, 0.047119140625, -0.03662109375, -0.06396484375, 0.046142...
37,350
37350
triangle area proof April 26th 2006, 08:35 PM #1 triangle area proof In triangle ABC, X is the midpoint of AB and Y is the midpont of AC. XC is joined. Prove a) ∆AXY = ∆XYC in area b) ∆AXC = half ∆ABC in area c) Find what fraction the area of ∆AXY is of the ∆ABC thanks jacs In ...
4
[ -0.0123291015625, 0.035888671875, 0.0235595703125, -0.0341796875, 0.03369140625, -0.03662109375, -0.035888671875, 0.056396484375, -0.04931640625, 0.004364013671875, 0.0123291015625, -0.107421875, 0.048095703125, 0.08642578125, 0.1025390625, 0.06787109375, -0.0220947265625, 0.002243...
37,351
37351
Question about some element in a group commutes with its all conjuagates. up vote 3 down vote favorite 2 Let G be a group and g and h be elements in G. If g commutes with all conjugates of g and h commutes with all conjugates of h, can one conclude that gh commutes with all conjugates of gh? Thanks!! gr.group-theory...
5
[ -0.006195068359375, -0.0211181640625, 0.0693359375, -0.053466796875, 0.05029296875, -0.06298828125, 0.0732421875, -0.025634765625, -0.044677734375, -0.039794921875, 0.031494140625, 0.01416015625, 0.01251220703125, -0.06201171875, 0.023681640625, 0.0322265625, -0.01397705078125, 0.0...
37,352
37352
The conditional properties of 2 exponential functions Suppose $f_{X|Y}(x|y)=\frac{1}{y}e^{-\frac{x}{y}}$ and $f_Y(y)=e^{-y}$ where $0<x,y<\infty$ Why is it obvious that $E(X|Y)=Y$ and $Var(X|Y)=Y^2$ ?? Last edited by noob mathematician; October 16th 2010 at 09:19 PM. Hello, The distribution of X|Y is that of an expon...
5
[ 0.01116943359375, -0.068359375, 0.0031890869140625, 0.02734375, 0.0771484375, -0.043701171875, 0.0167236328125, -0.0185546875, 0.013427734375, -0.01904296875, 0.0233154296875, 0.08251953125, 0.0179443359375, 0.06787109375, 0.0174560546875, -0.0240478515625, 0.06201171875, -0.125976...
37,353
37353
e Bayesian Principal Component Analysis This example provides an implementation of Bayesian principal components analysis as described, for example, in Chris Bishop's book Pattern Recognition and Machine Learning. The code is provided in the Examples Browser. Most of you will be familiar with standard Principal Compon...
4
[ -0.042724609375, -0.044921875, -0.01177978515625, -0.06201171875, 0.0269775390625, 0.039306640625, 0.06982421875, 0.00213623046875, 0.02978515625, 0.0157470703125, 0.018310546875, 0.036865234375, 0.0294189453125, 0.017333984375, -0.0732421875, 0.0140380859375, 0.041259765625, 0.101...
37,354
37354
Math Images Permutations From Math Images Permutations The image is a tree of permutations which shows all possible orderings for four colors. Basic Description A permutation of any set is an arrangement of the set’s elements where order matters. As you can see from the above tree, the number of distinct arr...
4
[ 0.09814453125, -0.024169921875, 0.0211181640625, -0.0537109375, -0.0400390625, 0.0228271484375, 0.009521484375, 0.0262451171875, 0.142578125, 0.0634765625, -0.04052734375, 0.07373046875, 0.130859375, 0.0322265625, -0.0576171875, 0.07080078125, -0.083984375, -0.00579833984375, -0....
37,355
37355
quick complex number question Last edited by yellow4321; March 6th 2008 at 05:13 AM. There are three possible values of z. $z = 2e^{\frac{{\pi i}}{6}} \,,\,2e^{\frac{{ - \pi i}}{2}} \,\mbox{or} \,2e^{\frac{{5\pi i}}{6}}$ ok thanks i understand how to get 2e^i*(pi/6) but the over two solutions i do not understand how ...
4
[ -0.09228515625, 0.0185546875, 0.00787353515625, 0.1279296875, 0.01373291015625, -0.0264892578125, -0.006072998046875, 0.058349609375, 0.01263427734375, -0.047607421875, -0.005126953125, -0.060302734375, 0.04833984375, -0.0233154296875, 0.0067138671875, -0.00897216796875, -0.054931640...
37,356
37356
Convexity of Jacobi's theta function with zero argument up vote 9 down vote favorite 2 This question may be elementary, I have asked it on math.stackexchange.com but have not received any answer yet. Note that I am not an expert on theta/elliptic functions. Define Jacobi's theta function with argument zero and nome $...
5
[ -0.035888671875, -0.017822265625, 0.03662109375, 0.00124359130859375, -0.054443359375, 0.01519775390625, 0.032470703125, 0.0224609375, 0.09619140625, 0.00469970703125, -0.00946044921875, 0.0517578125, 0.041015625, 0.02392578125, -0.1025390625, 0.02783203125, -0.01092529296875, -0.1...
37,357
37357
Degrees of Generality Date: 03/13/99 at 00:17:30 From: Pete Subject: Different types of Integrals In my calculus class, I learned the Riemann integral. However, in my side readings, I came across terms like Riemann-Stieltjes integral and even Lebesgue integral. They seem to be different; could you explain why we nee...
5
[ 0.01171875, -0.03173828125, -0.013671875, -0.07763671875, 0.049560546875, 0.00909423828125, -0.03076171875, 0.0830078125, 0.08544921875, -0.019775390625, -0.06884765625, -0.006378173828125, -0.031005859375, 0.04150390625, 0.0078125, -0.158203125, 0.038818359375, -0.022705078125, ...
37,358
37358
partial differential initial value problem November 17th 2008, 08:19 AM #1 Junior Member Joined Nov 2008 Posts 34 partial differential initial value problem Hi! I am currently trying to find a formula which solves the problem: $u_t-\triangle u+cu=f$ on $\mathbb{R}^n$ x $(0,\infty)$ and $u(x,0)=g(...
4
[ -0.1533203125, 0.02685546875, 0.043212890625, 0.011474609375, 0.0303955078125, 0.023193359375, 0.01556396484375, -0.02978515625, -0.0634765625, 0.01495361328125, 0.0247802734375, -0.0791015625, -0.05078125, -0.033447265625, 0.05322265625, -0.064453125, 0.0341796875, -0.099609375, ...
37,359
37359
Uniqueness of Hensel factors of a polynomial (invariant to change of "basepoint")? up vote 0 down vote favorite An important component of algorithms for factoring multivariate polynomials over a commutative ring $R$ is Hensel lifting. Here's a brief, concrete example to set the stage for my question: Let $f \in F[X,...
5
[ -0.06689453125, -0.060302734375, -0.07080078125, -0.05126953125, 0.03515625, 0.047119140625, 0.04296875, -0.064453125, 0.006683349609375, -0.064453125, -0.0032806396484375, 0.052001953125, -0.0400390625, -0.045654296875, 0.034423828125, 0.123046875, -0.0771484375, 0.033935546875, ...
37,360
37360
equation rearrange May 22nd 2008, 07:25 AM #1 Newbie Joined Oct 2007 Posts 7 equation rearrange please help me wacc=16% kd is 40%,ke is 60% ,t is 30% required keu? formula wacc=keu(keu-kd)(1-t)kd/ke. answer is 14.1% but i dunt know how to calculate it... I assume $keu$ is one variab...
4
[ 0.029296875, 0.06494140625, 0.051025390625, -0.01806640625, -0.09375, -0.0279541015625, 0.00531005859375, -0.02880859375, -0.0267333984375, 0.068359375, 0.11181640625, -0.1630859375, -0.00860595703125, 0.028564453125, -0.034423828125, 0.045654296875, -0.0615234375, 0.00970458984375...
37,361
37361
Heron's Formula, Cartesian Coordinate Plane Date: 11/01/2001 at 07:36:16 From: Jacob Kohl Subject: Geometry If a triangle has sides 5, 6, and the square root of thirteen, what is the area of the triangle? Thank you for your help. Date: 11/01/2001 at 12:18:50 From: Doctor Greenie Subject: Re: Geometry Hi, Jacob -...
4
[ -0.012939453125, 0.04345703125, -0.048095703125, -0.09375, -0.0123291015625, 0.0029449462890625, -0.036865234375, 0.031005859375, -0.01953125, 0.01385498046875, -0.012939453125, 0.0191650390625, -0.09814453125, 0.0703125, 0.0235595703125, 0.0181884765625, -0.06298828125, -0.0115356...
37,362
37362
Is arbitrary union of closed balls in R^{N} Lebesgue measurable? up vote 13 down vote favorite 5 Is an arbitrary union of non-trivial closed balls in the Euclidean space $\mathbb R^{N}$ Lebesgue measurable? If so, is it a Borel set? @George I still have two questions concerning your sketch of proof. First, how can ...
5
[ 0.04443359375, -0.0159912109375, -0.01324462890625, -0.0712890625, 0.04443359375, 0.10595703125, 0.1513671875, 0.0108642578125, 0.06103515625, 0.023193359375, -0.09912109375, -0.0546875, 0.015869140625, 0.03125, -0.000240325927734375, -0.0289306640625, 0.0615234375, -0.07958984375,...
37,363
37363
Find fog and its domain and range? June 25th 2009, 01:15 PM #1 Find fog and its domain and range? Find $f(g(x))$ if $f(x) = [x] + \{x\}^2$ and $g(x) = [x] + \sqrt{\{x\}}$ and also find the domain and range of f(x). Answer: I am not getting a matching answer. Anyone? NOTE: [x] is floor function/grea...
4
[ -0.0223388671875, 0.00701904296875, 0.033203125, 0.0184326171875, -0.08740234375, 0.00640869140625, 0.0947265625, -0.04443359375, -0.027099609375, -0.07958984375, -0.0181884765625, -0.005950927734375, 0.07373046875, 0.012939453125, 0.0308837890625, 0.0198974609375, 0.0135498046875, ...
37,364
37364
compound interest September 24th 2006, 12:19 PM #1 Junior Member Joined Sep 2006 Posts 38 compound interest if $500 was invested at 8%/a, compounded annually, in one account, and $600 was invested at 6%/a, compounded annually, in another account, then when would the amounts in both accounts be equal? ...
4
[ 0.03076171875, -0.01336669921875, -0.037109375, -0.0167236328125, -0.02783203125, -0.1220703125, -0.03466796875, 0.020263671875, 0.038818359375, 0.00665283203125, -0.0302734375, 0.0023651123046875, 0.017822265625, 0.064453125, 0.045654296875, 0.0625, -0.130859375, 0.03076171875, ...
37,365
37365
Properties of the Phi Function Date: 01/19/99 at 14:06:27 From: Hugo Joyce Subject: The 'PHI' function. Dear Dr. Math, Could you inform me of any possible links between Phi of a number and the number? For example I know that Phi of any prime number p can be found by subtracting 1 from the number: Phi(p) = p - 1...
4
[ -0.039306640625, 0.004608154296875, 0.037353515625, 0.01129150390625, -0.022705078125, 0.007293701171875, 0.056396484375, 0.06787109375, -0.01397705078125, -0.0179443359375, -0.016357421875, 0.0966796875, -0.0137939453125, 0.015869140625, -0.0289306640625, -0.0693359375, -0.078613281...
37,366
37366
Julian Day Number to Julian and Gregorian Date 3.2 Julian Day Number to Julian and Gregorian Date - Algorithm Forms 3.2.1 Julian Day number to Gregorian Date The previous algorithm development section justifies the following general algorithm forms for converting a Julian Day Number into a Gregorian Date. In this d...
4
[ -0.04345703125, 0.1142578125, 0.01300048828125, -0.0228271484375, -0.0810546875, -0.10693359375, -0.0634765625, 0.06201171875, -0.03564453125, -0.06982421875, 0.0087890625, -0.1044921875, 0.0439453125, 0.0303955078125, 0.0291748046875, -0.11474609375, -0.083984375, -0.0034790039062...
37,367
37367
Math Help March 12th 2010, 03:04 PM #1 Member Joined Sep 2009 Posts 78 related rates two cars approach an intersection at a certain time, each car is 5km from it. One car travels west at 90km/h and the other south at 80km/h. How fast is the distance between the two cars decreasing after 2min? I...
5
[ 0.034423828125, 0.026611328125, 0.052001953125, -0.00946044921875, -0.034423828125, 0.02294921875, -0.08935546875, 0.052978515625, -0.03173828125, -0.04248046875, 0.11474609375, 0.040771484375, 0.03857421875, 0.04736328125, -0.037353515625, 0.05126953125, 0.00726318359375, -0.07910...
37,368
37368
The classifying space of a gauge group up vote 7 down vote favorite 2 Let $G$ be a Lie group and $P \to M$ a principal $G$-bundle over a closed Riemann surface. The gauge group $\mathcal{G}$ is defined by $$\mathcal{G}=\lbrace f : P \to G \mid f(p \cdot g) = g^{-1}f(p)g\ (\forall g \in G, p \in P) \rbrace.$$ I want ...
4
[ -0.08349609375, 0.015380859375, 0.0615234375, 0.042236328125, 0.07080078125, 0.10498046875, 0.13671875, 0.030517578125, -0.0140380859375, 0.007720947265625, 0.048583984375, 0.04296875, -0.05517578125, -0.0035552978515625, 0.0244140625, 0.050048828125, -0.02734375, -0.00738525390625...
37,369
37369
Ring theory - radicals. December 11th 2008, 02:30 PM #1 Member Joined May 2008 Posts 86 Ring theory - radicals. Hello, thank you very much for reading. I have two homework assignments which I struggle with for quite some time. 1) Let R be a commutative, unitary (R has a unit) Ring, and let I be ...
4
[ -0.06982421875, 0.05859375, -0.06640625, 0.08056640625, 0.0189208984375, -0.053466796875, 0.0927734375, -0.0247802734375, 0.013916015625, -0.08935546875, -0.0634765625, 0.0235595703125, 0.072265625, -0.0155029296875, -0.015869140625, 0.0064697265625, 0.00946044921875, 0.02880859375...
37,370
37370
Polygon with 13 Sides The two-dimensional shapes with number of sides at least three are called as polygons. The polygons with 13 sides are called as Tridecagon or other wise called as triskaidecagon. The regular decagon has 12 equal sides and angles. The Tridecagon cannot be constructed with compass and ruler. In thi...
4
[ -0.000762939453125, 0.039306640625, -0.037841796875, -0.046875, -0.10302734375, -0.07958984375, -0.0306396484375, 0.06591796875, 0.044189453125, 0.00335693359375, 0.0035858154296875, -0.07763671875, -0.0537109375, 0.025146484375, 0.044921875, -0.11669921875, -0.0164794921875, 0.011...
37,371
37371
interesting circle problem April 22nd 2013, 03:04 PM aaronrpoole interesting circle problem I found this the other day online, and its fairly interesting: a circle is inscribed in a 36 degree sector of a circle with an area of 25(pi) cm squared. What is the circumfrance and area of the smaller circle? ...
4
[ 0.0302734375, 0.06689453125, 0.009765625, 0.045654296875, 0.00408935546875, -0.09130859375, 0.0252685546875, 0.0296630859375, 0.01507568359375, -0.014892578125, -0.036376953125, 0.007476806640625, 0.0712890625, 0.060546875, 0.0693359375, 0.0106201171875, -0.01513671875, -0.01550292...
37,372
37372
Has the Lie group preserving a probability distribution been used in Bayesian statistics? up vote 3 down vote favorite 1 For a (possibly signed) nondegenerate probability measure $\pi$ on $\{1,\dots,n\}$ define $$\langle \pi \rangle := \{R \in \operatorname{STO}(n): \pi R = \pi \}.$$ Here $\operatorname{STO}(n)$ denot...
4
[ -0.095703125, -0.02099609375, -0.03662109375, 0.0228271484375, -0.052490234375, 0.09716796875, 0.04736328125, -0.07861328125, 0.09326171875, -0.025146484375, 0.08154296875, 0.05419921875, 0.02734375, -0.0238037109375, 0.03125, -0.04150390625, -0.014404296875, 0.1103515625, -0.028...
37,373
37373
More fun with Pascal's triangle (Challenge #9) 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 1 5 10 10 5 1 1 6 15 20 15 6 1 1 7 21 35 35 21 7 1 1 8 28 56 70 56 28 8 1 It’s chock-full of amazing patterns (big surprise). I think I’ll spend a post or two (or three?) looking at a few of them. First up: as noted by Steve Gilberg, ...
4
[ -0.0888671875, 0.0142822265625, -0.05712890625, 0.0262451171875, -0.0079345703125, -0.0242919921875, -0.00164794921875, -0.02001953125, -0.0135498046875, 0.0025634765625, -0.11083984375, -0.00152587890625, 0.0498046875, -0.00872802734375, -0.0322265625, 0.0164794921875, -0.0603027343...
37,374
37374
Linear Transformation & Invariant subpsce Question October 26th 2008, 11:09 AM #1 Member Joined Jan 2008 Posts 78 Linear Transformation & Invariant subpsce Question The matrix A given below represents a linear transformation L : R2 --> R2 in the standard basis. Argue that this linear transformation o...
5
[ -0.08056640625, -0.037109375, -0.01092529296875, 0.0125732421875, 0.06884765625, 0.09814453125, 0.0157470703125, -0.0849609375, 0.02099609375, -0.0439453125, -0.0076904296875, -0.07861328125, 0.029052734375, -0.004180908203125, -0.030029296875, 0.0054931640625, -0.040771484375, -0....
37,375
37375
Trig Identities 1. December 3rd 2009, 03:17 AM #1 2. December 3rd 2009, 04:12 AM #2 By letting $x=cos\theta$, differentiating to get $\frac{dx}{d\theta}=-sin\theta$, which becomes $dx=-sin\theta{d\theta}$ Substituting into the integral, you get $\frac{-sin\theta{d\theta}}{(1+cos^2\theta)...
5
[ -0.039306640625, 0.0306396484375, 0.07861328125, 0.00799560546875, 0.01446533203125, -0.0703125, -0.030517578125, 0.0018768310546875, 0.04541015625, 0.0439453125, 0.056396484375, 0.06884765625, -0.01361083984375, -0.00927734375, -0.0751953125, 0.047119140625, 0.046630859375, -0.050...
37,376
37376
3 points of a triangle, 21 bits to find March 16th 2009, 04:12 PM Knoll318 3 points of a triangle, 21 bits to find Okay, the title may not have made it very clear, but I have 3 vertexes of a triangle. $A= (3,2)$ $B= (1,-2)$ $C= (-2,1)$ I need to find a bunch of stuff, all in Standard Form (Ax+B...
4
[ -0.06884765625, 0.024169921875, 0.0184326171875, -0.046875, 0.0274658203125, 0.001190185546875, -0.004241943359375, 0.020751953125, -0.0830078125, 0.04541015625, 0.023681640625, -0.1005859375, 0.0211181640625, 0.032958984375, 0.001068115234375, 0.0286865234375, -0.05615234375, -0.0...
37,377
37377
Finding cos and sin from tan? April 5th 2010, 06:49 PM #1 Member Joined Mar 2010 Posts 133 Give the expression for one of the three functions sin θ, cos θ, or tan θ, with θ in the first quadrant. Find expressions for the other two functions. Your answer will be algebraic expressions in terms of x. ...
4
[ -0.053466796875, -0.037353515625, 0.00146484375, -0.060546875, -0.02783203125, 0.0546875, 0.042236328125, 0.00156402587890625, 0.0191650390625, -0.0439453125, 0.07568359375, -0.056396484375, 0.031982421875, 0.0322265625, 0.111328125, 0.02294921875, -0.07958984375, 0.0284423828125, ...
37,378
37378
Inverse Functions March 11th 2007, 09:00 PM #1 Junior Member Joined Mar 2007 Posts 56 Inverse Functions So, I need to find (F^-1)'(a) of f(x) = 3 x^2 + tan(πx/2) , -1< x < 1, a=3 I have worked the problem to this point (f^-1)'(3) = 1/2x + sec^2(πx/2)π/2 = 1/2(0) + sec^2(π(0)/2)π/2 ...
5
[ -0.06396484375, 0.008544921875, 0.07568359375, 0.0111083984375, -0.0537109375, -0.00189208984375, 0.006988525390625, 0.0390625, 0.06591796875, 0.019775390625, 0.0859375, -0.05615234375, 0.046142578125, -0.027587890625, -0.018310546875, -0.03759765625, 0.01708984375, -0.07568359375,...
37,379
37379
Linear factors with complex numbers. April 29th 2013, 01:14 PM FatimaA Linear factors with complex numbers. I went through my completed pretest with a classmate and came across this problem: Factor x^4-4x^2-45 into linear factors allowing complex numbers. If you use your graphing calculator, be sure to expl...
4
[ -0.033203125, 0.0286865234375, 0.0245361328125, 0.040771484375, 0.00138092041015625, -0.00250244140625, -0.005523681640625, -0.020751953125, -0.01422119140625, -0.03125, 0.11767578125, -0.03857421875, 0.06298828125, 0.1181640625, -0.007476806640625, -0.0230712890625, -0.0634765625, ...
37,380
37380
Norm convergence of multiple ergodic averages for commuting transformations I’ve just uploaded to the ArXiV my paper “Norm convergence of multiple ergodic averages for commuting transformations“, submitted to Ergodic Theory and Dynamical Systems. This paper settles in full generality the norm convergence problem for s...
4
[ 0.048828125, -0.08203125, -0.018310546875, -0.0732421875, 0.103515625, 0.0113525390625, 0.07958984375, 0.0205078125, 0.01397705078125, -0.10302734375, 0.003173828125, 0.0546875, 0.0771484375, -0.04150390625, -0.01202392578125, -0.033203125, -0.0118408203125, 0.0120849609375, 0.03...
37,381
37381
Directional derivative February 4th 2011, 04:07 PM #1 Junior Member Joined Feb 2011 Posts 30 Directional derivative Find $a,b,c$ constants so that the directional derivative of $f(x,y,z)=axy^2+byz+cz^2x^3$ on $(1,2,-1)$ has a maximum value of $64$ on a parallel direction to the $z$ axis. I think we ...
5
[ 0.00634765625, -0.046142578125, -0.004730224609375, -0.08544921875, -0.09033203125, 0.00604248046875, -0.0306396484375, 0.032470703125, -0.0400390625, 0.057373046875, -0.00177001953125, 0.05224609375, 0.03466796875, -0.004302978515625, -0.024169921875, 0.04931640625, -0.068359375, ...
37,382
37382
FX Derivatives SWAPS Types and Valuation INTEREST RATE AND CURRENCY SWAPS Definition A swap is a contract between two parties to deliver one sum of money against another sum of money at periodic intervals. • Obviously, the sums exchanged should be ...
5
[ 0.004302978515625, -0.028076171875, -0.05126953125, -0.02490234375, -0.10107421875, 0.006866455078125, -0.0103759765625, 0.01953125, 0.07666015625, 0.0004425048828125, -0.01129150390625, 0.017578125, 0.0018310546875, 0.0184326171875, 0.0380859375, 0.021484375, -0.12109375, 0.009033...
37,383
37383
On reducible polynomials with positive coefficients, $1$ as constant coefficient and certain bounds on coefficients up vote 0 down vote favorite Given $a \in \mathbb{Z}$ with $a > 1$. Let $g(x) \in \mathbb{Z}[x]$ be a polynomial with $g(a)=\pm 1$. Let $h(x) \in \mathbb{Z}[x]$ be a polynomial with $h(a)= p$, a prime. L...
5
[ -0.005096435546875, 0.007720947265625, -0.0047607421875, 0.06396484375, -0.005401611328125, 0.031982421875, 0.052734375, -0.034912109375, -0.037353515625, -0.03466796875, -0.0498046875, 0.02587890625, 0.1083984375, -0.001129150390625, -0.0028533935546875, -0.0255126953125, 0.02478027...
37,384
37384
Sunday FunctionSunday Function There’s an interesting book I’m working on called The Fall of Rome: And the End of Civilization You can make a similar argument in a positive direction about the history of mathematics. Math has existed more or less forever, but I’d say there’s a definite new era that started at roughly ...
4
[ -0.062255859375, 0.0167236328125, 0.038330078125, -0.002227783203125, -0.042236328125, 0.0203857421875, -0.08447265625, 0.0146484375, -0.0234375, -0.004150390625, -0.024169921875, 0.0299072265625, -0.01312255859375, 0.072265625, -0.0157470703125, -0.1083984375, -0.1396484375, 0.036...
37,385
37385
Arithmetic Sequences - T5 = 3T2 and S6= 36, find the first three terms. October 26th 2008, 05:37 AM #1 Newbie Joined Oct 2008 Posts 1 Arithmetic Sequences - T5 = 3T2 and S6= 36, find the first three terms. Yo, some questions. As in how do u do these. Thanks. T5 = 3T2 and S6= 36, find the first ...
4
[ -0.1044921875, -0.06298828125, 0.037841796875, -0.09814453125, -0.047119140625, 0.054931640625, -0.0498046875, 0.0206298828125, -0.001983642578125, 0.0673828125, 0.08642578125, -0.0157470703125, -0.03759765625, -0.060546875, -0.00286865234375, -0.004974365234375, -0.037109375, 0.03...
37,386
37386
Calculus/parametric problem. I can't figure this out : ( January 19th 2009, 09:32 PM #1 Newbie Joined Jan 2009 Posts 2 Calculus/parametric problem. I can't figure this out : ( Hey all, here's the problem I've been struggling with: Cameron is located 2 miles due East of an intersection between two co...
5
[ -0.0220947265625, 0.000957489013671875, 0.044921875, -0.080078125, -0.004425048828125, -0.018798828125, -0.0228271484375, 0.0751953125, 0.0084228515625, 0.058349609375, 0.08154296875, -0.06201171875, 0.0038299560546875, 0.10107421875, -0.0361328125, 0.087890625, -0.027099609375, -0...
37,387
37387
Beyond the Ariel - Page 714 - diyAudio Here you go Elias, enjoy. The Tale of the Transfer Function Let’s revisit the “sinusoidal steady state” course notes and stick with the same notation: lower case for time domain signals, upper case for frequency domain; a system of impulse response h(t), transfer function (Frequ...
4
[ -0.0693359375, 0.01611328125, -0.02294921875, 0.04736328125, 0.0341796875, -0.006072998046875, -0.00506591796875, -0.03173828125, 0.027099609375, -0.0272216796875, 0.0341796875, 0.00848388671875, 0.0634765625, -0.0888671875, -0.034912109375, -0.02001953125, -0.07275390625, -0.00066...
37,388
37388
Proof/derivation of the trapezium rule error estimate November 16th 2012, 07:17 AM #1 Newbie Joined Nov 2012 From United Kingdom Posts 4 Proof/derivation of the trapezium rule error estimate Hi, I'm trying to derive the error estimate in the trapezium rule but can't find any derivations on the intern...
4
[ -0.000095367431640625, 0.044677734375, 0.08642578125, -0.042724609375, 0.0234375, -0.011474609375, -0.00958251953125, 0.0869140625, -0.0419921875, 0.05078125, 0.03466796875, -0.003326416015625, 0.10888671875, -0.08740234375, -0.0147705078125, 0.03271484375, -0.0279541015625, 0.0045...
37,389
37389
Integral of Rational Function September 29th 2010, 08:17 AM centenial Integral of Rational Function I got this question on an exam this morning and I didn't know how to answer it. I've been working on it the past hour trying to figure it out. Usually with rational functions, I factor to get it in a from that...
5
[ 0.028564453125, 0.0223388671875, 0.064453125, 0.06494140625, 0.07958984375, 0.006988525390625, -0.041748046875, -0.0179443359375, 0.006927490234375, -0.042724609375, -0.0274658203125, -0.0751953125, -0.0089111328125, 0.10498046875, -0.0634765625, -0.0145263671875, 0.10693359375, 0....
37,390
37390
Fourier transform and spectrum of PDOs in $L^p$ up vote 2 down vote favorite 1 Let $K$ be a compact subset in $\mathbb{R}^n$ with $m(K)=0$, Suppose $supp\hat{u}\subset K$ for some $u\in L^p$,where $2\leq p\leq \frac{2n}{n-1}$,can we get $u\equiv 0$ ? Motivation: If $K$ is a compact non-degenerate hypersurface,then it...
4
[ 0.032470703125, 0.028564453125, 0.0238037109375, -0.02587890625, 0.04931640625, 0.045654296875, -0.020751953125, 0.00860595703125, -0.09716796875, -0.032958984375, 0.0208740234375, 0.01324462890625, -0.0615234375, -0.033447265625, 0.040283203125, -0.04931640625, 0.00885009765625, -...
37,391
37391
Program to Convert Number Bases Date: 07/12/99 at 11:02:43 From: Mike Manson Subject: Easier way to convert base systems of numbers Hi, I've learned that you can convert the base system of a number using the following method: 12461 base 10 --> base 4 4|12461 3115 r 1 778 r 3 194 r 2...
4
[ 0.0123291015625, 0.061279296875, -0.05908203125, -0.0478515625, -0.060791015625, 0.0013580322265625, -0.02490234375, 0.1201171875, -0.008056640625, 0.01177978515625, -0.07666015625, -0.00811767578125, 0.0108642578125, 0.035400390625, 0.0172119140625, 0.00885009765625, -0.1083984375, ...
37,392
37392
Proof Adj characteristic Hi, How can I proof that adj(AB)=adj(B)*adj(A)? I tried to use with the characteristic of A*adj(A)=|A|*I Thanks. If A,B are invertible matrices the proof is very easy and short, but in the general case it is, imo, a very involved, long proof which uses, if I remember correctly, exterior produc...
5
[ -0.06640625, 0.0194091796875, -0.0269775390625, 0.00201416015625, 0.0301513671875, -0.0703125, 0.0986328125, -0.06396484375, -0.055908203125, 0.01031494140625, 0.00494384765625, -0.01483154296875, 0.04345703125, -0.002899169921875, 0.064453125, 0.10400390625, 0.025634765625, 0.0878...
37,393
37393
help with work May 2nd 2007, 03:17 PM ^_^Engineer_Adam^_^ help with work: Integral applications A hemispherical tank, placed so that the top is a circular region of radius 6ft, is filled with water to a depth of 4 ft. Find the work done in pumping the water to the top of the tank. Ans. 50,185 lb-ft October...
5
[ -0.026611328125, 0.099609375, -0.0269775390625, -0.04345703125, 0.00665283203125, -0.08837890625, -0.01422119140625, 0.036865234375, -0.024169921875, -0.044921875, -0.08935546875, -0.0240478515625, 0.019287109375, 0.028076171875, -0.00885009765625, -0.0172119140625, -0.064453125, -...
37,394
37394
Math Help March 15th 2011, 07:10 PM #1 ordered bases Let $S={\vec v_1, \vec v_2}$ and $T={\vec w_1, \vec w_2}$ be bases for $P_1$ where $\vec w_1 = t-1$ and $\vec w_2 = t+1$. If the transition matrix from T to S is $\left[ {\begin{array}{cc}<br /> 1 & 2 \\<br /> 2 & 3 \\<br /> \end{array} } \right]<br />$ de...
4
[ -0.0908203125, -0.01611328125, -0.09716796875, -0.052490234375, 0.05859375, -0.018310546875, -0.000667572021484375, 0.0260009765625, 0.0225830078125, -0.046875, 0.005950927734375, 0.00457763671875, 0.01544189453125, -0.02490234375, -0.10791015625, 0.0111083984375, -0.0281982421875, ...
37,395
37395
1980 1980 Applied Maths Higher Level Questions 1.  A boat has to travel by the shortest route to the point 4.25 j km and then return immediately to its starting point at the origin. ...
4
[ -0.0142822265625, 0.09033203125, 0.005859375, -0.006072998046875, -0.020263671875, -0.0196533203125, -0.027099609375, 0.10693359375, -0.10546875, -0.04345703125, 0.02978515625, -0.02685546875, -0.055908203125, 0.02099609375, -0.0380859375, 0.1259765625, -0.032470703125, 0.004028320...
37,396
37396
Please help with Composite Rule Part2.doc Can someone please help as I have tried this and have gone without sleep for 2 nights. Thank you. The composite rule is also known as the chain rule. Put simply, the derivative of the inside times the derivative of the outside. $\frac{dy}{dx}=\frac{dy}{du}\cdot\frac{du}{dx}$ W...
5
[ 0.034912109375, 0.015869140625, 0.02587890625, -0.0186767578125, -0.0028228759765625, -0.051513671875, -0.04931640625, -0.0118408203125, 0.0289306640625, -0.02587890625, 0.04931640625, -0.026611328125, 0.018798828125, -0.06396484375, 0.047607421875, -0.0262451171875, -0.039306640625,...
37,397
37397
Functionn of two random variables. Could anyone help me with this question please? Given X and Y are continuous random variables with the following joint probability density function: $<br /> <br /> f(x,y) =<br /> \begin{cases}<br /> {\theta}^2 e^{-{\theta} y} & 0 < x < y \\<br /> 0 & \text{otherwise}<br ...
4
[ 0.0186767578125, -0.0419921875, 0.0103759765625, -0.125, -0.0038299560546875, -0.01141357421875, 0.01116943359375, -0.0634765625, -0.027587890625, -0.046875, 0.0625, 0.038818359375, -0.004852294921875, 0.076171875, -0.01092529296875, -0.03955078125, -0.0033721923828125, -0.06640625...
37,398
37398
Radians. how to solve problem. September 29th 2009, 07:45 PM #1 Junior Member Joined Sep 2009 Posts 27 Radians. how to solve problem. 1) Give the exact value of the following: 4cos(π/4) 2) Evaluate the following expression when x is π/4. Use the exact value: 5cos(2x) 3) For the following e...
4
[ 0.005035400390625, 0.0252685546875, 0.045166015625, 0.00185394287109375, -0.06201171875, 0.0034942626953125, -0.0166015625, 0.040771484375, 0.0189208984375, 0.002471923828125, 0.0205078125, -0.0277099609375, 0.0224609375, 0.09765625, 0.0303955078125, 0.0224609375, 0.0228271484375, ...
37,399
37399