content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Boolean Algebra
Posted by Anonymous on Saturday, February 9, 2013 at 1:00pm.
I need help starting this, I don't want a plain answer just a what to do.
(bc'+a'd)(ab'+cd')-Simplify
My best guess is to use the distributive
property.
(a+b)(a+c)= a(b+c). But now that there is a 4th variable what do I do?
• Boolean A... | 4 | [
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0.10302734... | 33,200 | 33200 | |
Math Logic Proving Proofs
April 4th 2010, 11:42 AM
Bungkai
Math Logic Proving Proofs
Give a proof of
http://www.earlham.edu/%7Epeters/writing/syncon.gif A ^ (A V B) http://www.earlham.edu/%7Epeters/writing/matequiv.gif A.
I have an additional question. I do not really understand what http://www.earlham.... | 5 | [
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-0.004425048828... | 33,201 | 33201 | |
Expected Utility in Quantum States
Last semester, 14.04 — Intermediate Microeconomic Theory covered choice theory under uncertainty; at the same time, I was taking 8.05 — Quantum Physics II, where we had talked about 2-state systems
and the formalism of quantum states being complex vectors in a Hilbert space, and as ch... | 5 | [
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... | 33,202 | 33202 | |
Homework Help
Posted by Stacey on Tuesday, March 5, 2013 at 5:06pm.
The price of a home is $185,000. A down payment of 10% is required with 2 points at the time of closing. The home is financed over a 25 year period with a fixed rate of 4.5%. Find the monthly payment
and total interest paid?
• Math - Henry, Thursda... | 4 | [
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Generate binary data
October 17th 2006, 07:49 AM #1
ninaricci
Guest
generate binary data b_k using randint.
2. define the sampling time, and the data rate. For example, data rate can be R=10kbps, T=1/R, and sampling time Ts=T/40;
3. according to the above define your pulse shape (wave form of the different... | 5 | [
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-0.076171875,
-0.054... | 33,204 | 33204 | |
power series, w/ interval convergence
April 19th 2007, 02:32 PM #1
Senior Member
Joined
Jan 2007
Posts
477
power series, w/ interval convergence
express the function as the sum of a power series by first using partial fractions.
find the interval of convergence.
heres the function: f(x) = 3/(x^... | 5 | [
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0.04... | 33,205 | 33205 | |
Linear Regression: Mean square error (MSE)
May 20th 2009, 03:11 AM #1
Senior Member
Joined
Jan 2009
Posts
404
Linear Regression: Mean square error (MSE)
Simple linear regression model:
Y_i = β0 + β1*X_i + ε_i , i=1,...,n
where n is the number of data points, ε_i is random error
Let σ^2 = V(... | 4 | [
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-0.002777... | 33,206 | 33206 | |
A Proof for the Inequality of Arithmetic and Geometric Means
November 9th 2010, 07:48 AM
bkarpuz
A Proof for the Inequality of Arithmetic and Geometric Means
Dear friends,
while working on some computations, I figured out that my arguments supply a proof for
the arithmetic and geometric mean inequality ... | 5 | [
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Reducing straightening over an interval to straightening over a point
up vote 1 down vote favorite
Recall:
Let $FU_\bullet:Cat\to Cat_\Delta$ be the bar construction assigned to the comonad $FU$ determined by free-forgetful adjunction $F:Quiv\rightleftarrows Cat:U$. The restriction of $FU_\bullet$ to the
full subcate... | 4 | [
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Groups- Proof using on the defination of a group
October 6th 2009, 12:56 PM #1
Member
Joined
Oct 2008
Posts
82
Groups- Proof using on the defination of a group
Let G be a group and let a, b ∈ G. Using only the definition of a group show that the two equations xa = b and ay = b have unique solutions in G.... | 5 | [
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0.034912... | 33,209 | 33209 | |
Math Help
January 5th 2011, 02:00 AM #1
Newbie
Joined
Jan 2011
Posts
8
Supremum
Hi,
Could someone assist me in the right direction concerning the following problem:
Deduce the existence of a supremum from the principle of nested intervals.
I hope this will help...
Let $(a_n)$ be boun... | 4 | [
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0.0625,
0.005615234375,
... | 33,210 | 33210 | |
probability
June 28th 2008, 03:48 PM #1
Newbie
Joined
Jun 2008
Posts
1
probability
i'm horrible in mathemantics...can some help with this question. find the probability that in FOUR tosses of a fair die a 3 appears
a)exactly no (zero)time
b)exactly three times
The probability of getting a 3 ... | 4 | [
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CBSE Sample Paper of Mathematics for Class X
Design of Sample Question Paper Mathematics, SA-1 Class X (2010-2011)
Type of Question Marks per question Total No. of Questions Total Marks
M.C.Q. 1 10 10
SA-I 2 8 16
SA-II ... | 4 | [
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Calc III Vector Problems--Please help!!
November 25th 2007, 08:55 PM #1
Newbie
Joined
Oct 2006
Posts
15
Calc III Vector Problems--Please help!!
Hello,
Can somebody help me with the following two problems?
1. Find a value of a such that the vector <a, 1,1> makes an angle of 45 degrees with the v... | 5 | [
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Solutions to Wave Interference Exercises and Problems
(for use with Wave Interference program by Mike Moloney, marketed by Physics Academic Software).
Due to limitations of text, q stands for the angle theta, and l stands for the wavelength.
1. [50% Intensity and phase difference with two sources.]
a) The phasors s... | 5 | [
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-0.... | 33,214 | 33214 | |
Triangle with 0<a<1<b<2<c<3
January 9th 2010, 08:09 AM #1
Senior Member
Joined
Nov 2007
Posts
329
Triangle with 0<a<1<b<2<c<3
In a triangle with sides $a$, $b$, $c$ the following holds: $0<a\le 1\le b\le 2\le c\le 3$. What can be the maximum area?
Maximum area
.
Last edited by Henryt999; Janua... | 4 | [
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Homework Help
Posted by jennifer on Sunday, September 21, 2008 at 10:20am.
solve
(2s + 5)(s+1)=-1
am I on the right track?
2s^2 +2s=5s=5+-1
2s^2+7s+5=-1
2s^2+7s=-6
where do i go from here?
• MATH - drwls, Sunday, September 21, 2008 at 10:30am
You need to get zero one one side of the equation, and then tr... | 4 | [
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PLease check math
Posted by Anonymous on Thursday, December 4, 2008 at 10:00am.
1)FInd an equation of the line containting the given pair of points.
(-8,0) and (0,5)
MY ANSWEAR: (5/8)X+5
2)Find an equation of the line having the given slope and containing the given point.
m=6 (8,1)
MY ANSWEAR: 6X-47
• PLease c... | 4 | [
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-0.00555419... | 33,217 | 33217 | |
Degree of Approximation by Hybrid Operators
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 732069, 8 pages
http://dx.doi.org/10.1155/2013/732069
Research Article
Degree of Approximation by Hybrid Operators
^1Department of Applied Mathematics, Delhi Technological University (Formerly Delhi College of En... | 5 | [
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0.00267028... | 33,218 | 33218 | |
Solving a problem using linear equations
May 8th 2009, 04:01 PM #1
Member
Joined
Aug 2008
Posts
179
Solving a problem using linear equations
In an isosceles triangle, 2 sides of equal length are together 8 cm longer than the third side. If the perimeter of the triangle is 32 cm, what is the length of eac... | 4 | [
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0.03173828125... | 33,219 | 33219 | |
Kolmogorov-Smirnov Test for Normality
Hypothesis Testing
Definition 1: Let x[1],…,x[n] be an ordered sample with x[1] ≤ … ≤ x[n] and define S[n](x) as follows:
Now suppose that the sample comes from a population with cumulative distribution function F(x) and define D[n] as follows:
Observation: It can be shown that... | 5 | [
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A Quick Introduction to Subdivision Surfaces
Subdivision Surfaces
Subdivision surfaces are polygon mesh surfaces generated from a base mesh through an iterative process that smooths the mesh while increasing its density. Complex smooth surfaces can be derived in a
reasonably predictable way from relatively simple mes... | 4 | [
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0.002227... | 33,221 | 33221 | |
Prove Trig Identity
$\frac{sin^2x - tanx}{cos^2x - cotx} = tan^2x$ I've tried and cannot prove it
Last edited by Raj; November 8th 2008 at 12:21 PM.
Hi, This equality can be written $\sin^2x-\tan x =\tan^2x\left(\cos^2x-\cot x\right)$. You should try to use $\begin{cases}\tan x = \frac{\sin x }{\cos x}\\ \cot x =\fra... | 4 | [
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... | 33,222 | 33222 | |
Homework Help
The sides of a triangle form an arithmetic sequence with a common difference of 2. The ratio of the measure of the largest angle to that of the smallest angle is 2:1. Find the area of the triangle.
• Math - drwls, Monday, May 26, 2008 at 12:05pm
I found by using the "triangle solver" at
(Broke... | 4 | [
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0.008972167968... | 33,223 | 33223 | |
Revista de la Unión Matemática Argentina
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versión On-line ISSN 1669-9637
Rev. Unión Mat. Argent. v.48 n.1 Bahía Blanca ene./jun. 2007
The Boltzmann equation with Force Term near the Vacuum
Rafael Galeano Andrades
Abstract. We prove a t... | 5 | [
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-0.0200195... | 33,224 | 33224 | |
Solving Rational functions
December 2nd 2012, 10:25 PM #1
Junior Member
Joined
Sep 2012
From
canada
Posts
45
Solving Rational functions
Can someone explain this to me?
1. 2+ 5/x+3 = 1 - (x+1) /x
2. 6x/(x-3) +3x = 2x^2/(x-3) -5
how do i solve this multiple by x? i dont understand, i know... | 4 | [
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-0.035888671875,
... | 33,225 | 33225 | |
Get homework help at HomeworkMarket.com
Question
Submitted by
Pokes1587
on Tue, 2012-08-21 23:30
due on Sat, 2012-08-25 23:25
answered 8 time(s)
Hand shake with
neel
: In progress
Pokes1587 is willing to pay $25.00
The manager of Sensible Essentials conducted an excellent seminar explaining debt and equity fi... | 5 | [
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Homework Help
Posted by ali on Wednesday, May 2, 2012 at 12:52pm.
Water is leaking out of an inverted conical tank at a rate of 12200 cubic centimeters per minute at the same time that water is being pumped into the tank at a constant rate. The tank has height 15
meters and the diameter at the top is 65 meters. If the... | 5 | [
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0.09228515625,
-0.018310546875,
-0.04443359375,
-0.00885009765625,
-0.034423828125,
0.0257568359375,
0.08935546875,
0.0167236328125,
0.03173828125,
-0.09033203125,
0.02... | 33,227 | 33227 | |
Complex number algebra question
March 11th 2013, 10:21 PM
Vishak
Complex number algebra question
Hi, can someone please verify my answers to this question. Thanks heaps!!
Find all complex numbers w and z satisfying:
1/w + 1/z = 1/wz and 2wz - z^2 -1 = 0
- I got the answers z = 1/3 +(or)- (√2 / 3)... | 4 | [
-0.12158203125,
-0.000732421875,
-0.019287109375,
0.08642578125,
-0.0126953125,
-0.083984375,
0.01904296875,
0.03369140625,
0.0035858154296875,
-0.045166015625,
0.01251220703125,
-0.05322265625,
0.03466796875,
0.06298828125,
-0.05224609375,
0.00677490234375,
-0.03515625,
-0.0284423... | 33,228 | 33228 | |
To make a normal approximation for a binomial distribution
January 27th 2011, 11:16 AM #1
Junior Member
Joined
Oct 2010
Posts
56
To make a normal approximation for a binomial distribution
So we have a weapon with probability $p=0.95$ of working succesfully. We test $n$ weapons and the stockpile is replac... | 5 | [
0.09228515625,
0.08447265625,
0.006439208984375,
-0.0111083984375,
-0.04345703125,
-0.044677734375,
0.078125,
0.058349609375,
-0.000865936279296875,
0.09716796875,
0.0225830078125,
-0.03173828125,
0.051513671875,
0.01385498046875,
0.037841796875,
0.03466796875,
0.0211181640625,
-0.... | 33,229 | 33229 | |
Some calc questions
May 13th 2006, 12:55 PM #1
Newbie
Joined
Mar 2006
Posts
15
Some calc questions
I'm having problems with some definite intergral questions
Int2-1 (Ln(x)/x^2) dx
I got 1 as a result from that, but it's different from the answer, I'm wondering about how to do it?
Also
I... | 5 | [
-0.0205078125,
-0.0234375,
0.10693359375,
0.0045166015625,
0.01953125,
-0.07568359375,
-0.007568359375,
0.046142578125,
0.02294921875,
0.01055908203125,
0.0791015625,
-0.0078125,
0.016845703125,
0.01531982421875,
-0.060546875,
-0.040283203125,
-0.03662109375,
-0.076171875,
-0.088... | 33,230 | 33230 | |
Fundamental systems
December 8th 2010, 09:53 AM #1
Junior Member
Joined
Oct 2010
Posts
33
Fundamental systems
Hello
Once again I'm stuck: I need to calculate (explicitly) a (real) fundamental system of the following ODE:
$<br /> x'=\begin{pmatrix}<br /> 2 &1 &0 & 0 & 0\\ <br /> 0& 2 &0 & 0 & 0\... | 4 | [
-0.04541015625,
-0.01312255859375,
-0.05712890625,
-0.055419921875,
-0.016357421875,
-0.0218505859375,
-0.02734375,
0.0004367828369140625,
0.036376953125,
0.039794921875,
0.150390625,
-0.0546875,
0.001678466796875,
-0.0634765625,
0.0047607421875,
-0.00836181640625,
-0.05859375,
0.0... | 33,231 | 33231 | |
Edwards coordinates for elliptic curves
This is joint work of Daniel J. Bernstein and Tanja Lange, building on work by Harold M. Edwards.
Summary of results
Fix a non-binary field k. If c,d are in k and cd(1-dc^4) is nonzero then the Edwards curve x^2+y^2 = c^2(1+dx^2y^2) is birationally equivalent to an elliptic cu... | 4 | [
0.0067138671875,
0.058349609375,
0.00006389617919921875,
0.0031585693359375,
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0.04248046875,
-0.032470703125,
0.0654296875,
-0.06298828125,
0.0238037109375,
-0.038818359375,
-0.0556640625,
-0.0498046875,
-0.07275390625,
0.01953125,
-0.07177734375,
0.... | 33,232 | 33232 | |
Runge kutta matlab code (method)
November 25th 2010, 03:55 AM #1
Banned
Joined
Nov 2010
Posts
8
Hi guys,
I am having trouble implementing Runge Kutta to solve the following
Lotka-Volterra equations.
dx/dt=x(1-2y) t0=0, x(t0)=1
dy/dt=-y(1-2x) t0=0, x(t0)=2
Below I given what code I h... | 4 | [
-0.09521484375,
0.039794921875,
-0.09326171875,
-0.05517578125,
-0.037841796875,
-0.0771484375,
-0.01123046875,
0.052490234375,
-0.02099609375,
0.013916015625,
0.040771484375,
-0.01470947265625,
0.01708984375,
-0.050048828125,
-0.007293701171875,
0.0255126953125,
-0.0859375,
-0.061... | 33,233 | 33233 | |
Posts by
Total # Posts: 12
algebra
x<-2 or x>1
Pre-calc
Watch your signs! (x^2 -4x+4)-4(y^2 +6y+9)=36+4+36 should be (x^2 -4x+4)-4(y^2 -6y+9)=36+4-36 (x^2 -4x+4)/4-4(y^2 -6y+9)/4=4/4 ((x-2)^2)/4- (y-3)^2 =1 hyperbola, center at (2,3)
Physics
Thank you so much Elena! I forgot to divide 8.8 by two and, of course, kep... | 5 | [
0.043212890625,
-0.0277099609375,
0.00555419921875,
-0.048095703125,
-0.00022125244140625,
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-0.007568359375,
0.068359375,
-0.0172119140625,
0.0179443359375,
0.08642578125,
-0.00186920166015625,
-0.08642578125,
0.021484375,
0.0751953125,
0.11376953125,
-0.0230712890625... | 33,234 | 33234 | |
Delta and factorization of polynomials?
September 22nd 2009, 07:19 AM
kenny1999
Delta and factorization of polynomials?
I am wondering if Delta (b square minus 4ac) has any relation or can determine if a quadratic polynomial (with a degree of 2) can be factorized?
To put it simply, let say, a quadratic expr... | 4 | [
0.0101318359375,
-0.029296875,
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0.00250244140625,
0.045654296875,
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-0.0103759765625,
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0.022705078125,
0.000568389892578125,
0.015625,
0.03466796875,
0.072265625,
0.03515625,
0.034423828125,
0.084472... | 33,235 | 33235 | |
Differentiate and Simplify
January 7th 2012, 06:34 AM #1
Newbie
Joined
Jan 2012
Posts
3
Differentiate and Simplify
Differentiate the following functions and simplify:
a) (x^4+2x^1/2)(lnx)
b) x^(x^2)
c) sinx/x^6
d) (e^4x^2)-2.
N:B The parentheses is not in the question, I onl... | 5 | [
-0.0262451171875,
0.000507354736328125,
0.06591796875,
0.0244140625,
0.02587890625,
-0.043701171875,
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0.005401611328125,
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0.07958984375,
0.0771484375,
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-0.00125885009765625,
-0.0264892578125,
-0.0255126953125,
0.07568359375,
-0.0825195... | 33,236 | 33236 | |
Antiderivative's application.
April 17th 2007, 10:46 AM #1
Junior Member
Joined
Nov 2006
Posts
59
Antiderivative's application.
A car is traveling at 50 mi/h when the brakes are fully applied, producing a constant deceleration of 22 ft/s^2.
what is the distant traveled before the car comes to a stop?... | 4 | [
-0.018310546875,
0.046142578125,
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0.04052734375,
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-0.047607421875,
0.05419921875,
-0.053955078125... | 33,237 | 33237 | |
Mind-Bending Science In Thomas Pynchon's Mind-Bending Novel Against The Day: Part II - The Quaternion Wars
Interested in the strange, turn-of-the-century science and math in Thomas Pynchon's novel
Against The Day
? In part 2 of my primer on Pynchon's science read about the obscure conflict among mathematicians over q... | 4 | [
-0.0634765625,
0.03564453125,
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0.03369140625,
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0.059814453125,
-0.09228515625,
0.0703125,
-... | 33,238 | 33238 | |
Finding height and base of building with 2 given angles.
June 5th 2010, 01:20 AM #1
Newbie
Joined
Jun 2010
Posts
2
hey, ive been working on this question for a while now; i just cant seem to get it.
A building is in the shape of a square prism with base edge m and height h metres. It stands on level ... | 4 | [
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0.11865234375,
0.00093841552734375,
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0.044921875,
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0.08154296875,
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0.05419921875,
0.0279541015625,
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0.044677734375,
0.0184326171875,
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0.04638671875,
-0.0576171875,
0.077636... | 33,239 | 33239 | |
Horticultura Brasileira
Serviços Personalizados
Artigo
Indicadores
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versão impressa ISSN 0102-0536
Hortic. Bras. vol.30 no.2 Vitoria da Conquista abr./jun. 2012
http://dx.doi.org/10.1590/S0102-05362012000200009
... | 4 | [
-0.025146484375,
0.020751953125,
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0.023681640625,
0.04736328125,
0.0186767578125,
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0.076171875,
-0.036376953125,
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0.0703125,
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-0.1142578125,
-0.03271484375,
-0.05859375,
0.049072265625... | 33,240 | 33240 | |
Logistic Equation Help
May 8th 2008, 12:05 AM
aznstyles408
Logistic Equation Help
dy/dt = r(1-y/K)y - Ey
r, K, and E are constants.
This is a logistic model of fish population.
a) Show that if E < r, then there are two equilibrium points y1 = 0
and y2 = K(1 - E/r) > 0
b) Show that y = y1 ... | 4 | [
-0.042236328125,
0.0036468505859375,
-0.056640625,
0.0201416015625,
0.056396484375,
-0.05224609375,
0.0281982421875,
0.046875,
-0.048095703125,
0.076171875,
0.0211181640625,
-0.0038909912109375,
-0.002349853515625,
0.037841796875,
0.0299072265625,
0.08740234375,
-0.00457763671875,
... | 33,241 | 33241 | |
enoising
→ BibTeX
@article{ipol.2011.ys-dct,
title = {{DCT image denoising: a simple and effective image denoising algorithm}},
author = {Yu, Guoshen and Sapiro, Guillermo},
journal = {{Image Processing On Line}},
volume = {1},
year = {2011},
doi = {10.5201/ipol.2011.ys-dct},
}
% if ... | 4 | [
-0.06298828125,
0.0203857421875,
0.049560546875,
-0.01287841796875,
0.041748046875,
-0.0712890625,
-0.047607421875,
0.04931640625,
0.0157470703125,
0.00113677978515625,
-0.046142578125,
0.08935546875,
0.05810546875,
-0.0022430419921875,
-0.035400390625,
0.061279296875,
-0.05102539062... | 33,242 | 33242 | |
why is this equal to zero?
1. December 13th 2012, 05:51 PM #1
2. December 15th 2012, 11:49 PM #2
Re: why is this equal to zero?
You can solve it like this:
\begin{align*} \frac{d}{dy}\int_{\cos^{2}(y)}^{\sin^{2}(y)}\frac{ 1}{t} dt =& \frac{d}{dy}\left( \ln(t) \Big{|}^{\sin^{2}(y)}_{\cos^{2}(y)}... | 5 | [
-0.0439453125,
-0.0012664794921875,
0.007415771484375,
0.0250244140625,
0.07861328125,
-0.0223388671875,
-0.05419921875,
0.0108642578125,
0.054931640625,
0.056884765625,
0.06982421875,
0.07275390625,
-0.0140380859375,
-0.00142669677734375,
-0.02880859375,
-0.01483154296875,
-0.050048... | 33,243 | 33243 | |
Can any one explain this question to me, thxs.
April 3rd 2010, 09:29 AM #1
Newbie
Joined
Apr 2010
Posts
3
Can any one explain this question to me, thxs.
- From a box containing 3 white balls and 7 black balls, 30 balls are drawn with replacement. Find the probability of getting 9 and 10 white balls?
... | 4 | [
0.07275390625,
0.03857421875,
-0.007110595703125,
0.06103515625,
0.0206298828125,
0.05322265625,
0.08203125,
0.0201416015625,
0.0252685546875,
0.03076171875,
0.0047607421875,
-0.07275390625,
0.0069580078125,
0.030517578125,
0.053955078125,
0.11376953125,
-0.0145263671875,
-0.060546... | 33,244 | 33244 | |
Get just a few values of invertible matrix
December 10th 2008, 01:33 AM
bumcheekcity
Get just a few values of invertible matrix
$\left(\begin{array}{ccccc}4&1&0&0&0\\\end{array}\r ight) \left(\begin{array}{ccccc}s&-1&0&0&0\\0&s&-1&0&0\\0&0&s&-1&0\\0&0&0&s&-1\\0&0&4&4&s-1\\\end{array}\right)^{-1} \left(\begin{arr... | 5 | [
-0.0125732421875,
-0.0169677734375,
-0.1103515625,
-0.02099609375,
0.031982421875,
-0.060302734375,
-0.031005859375,
-0.026611328125,
-0.04833984375,
-0.00872802734375,
0.04296875,
-0.01068115234375,
0.035400390625,
-0.0155029296875,
-0.060791015625,
0.031494140625,
0.0308837890625,
... | 33,245 | 33245 | |
Rings of Fractions - Dummit and Foote Section 7.5 - elements of Q as r.d-1
November 10th 2012, 02:33 PM #1
Rings of Fractions - Dummit and Foote Section 7.5 - elements of Q as r.d-1
I am reading Dummit and Foote, section 7.5 Rings of Fractions. I am working through Theorem 15 on page 261 (see attachment)
I a... | 4 | [
-0.09228515625,
0.06689453125,
0.03955078125,
-0.015869140625,
0.04052734375,
-0.05126953125,
0.09033203125,
0.033935546875,
0.04736328125,
-0.04443359375,
0.002777099609375,
-0.010498046875,
0.07470703125,
-0.06201171875,
-0.0289306640625,
0.0169677734375,
-0.029052734375,
0.03442... | 33,246 | 33246 | |
Computational & Applied Mathematics
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versão On-line ISSN 1807-0302
Comput. Appl. Math. vol.30 no.3 São Carlos 2011
http://dx.doi.org/10.1590/S1807-03022011000300004
Closed balls for interpolating quasi-polynomials
Jiajin Wen^I; Sui Sun... | 5 | [
-0.078125,
-0.007049560546875,
0.023193359375,
-0.04541015625,
-0.0198974609375,
0.006988525390625,
0.07080078125,
-0.055419921875,
0.020263671875,
-0.0120849609375,
-0.0240478515625,
-0.0000667572021484375,
0.091796875,
0.0019683837890625,
0.0233154296875,
0.0206298828125,
0.0206298... | 33,247 | 33247 | |
Proving indentity..
sin^6 A + cos^6 A= 1 - 3sin^2 A.cos^2 A
Last edited by snigdha; February 21st 2010 at 07:07 AM. Reason: typing error!
Hello, snigdha! Prove: . $\sin^6\!A + \cos^6\!A\;=\; 1 - 3\sin^2\!A\cos^2\!A$ The left side is a sum of cubes. $\text{Factor: }\;\underbrace{(\sin^2\!A + \cos^2\!A)}_{\text{This is... | 4 | [
-0.041259765625,
0.08544921875,
-0.047607421875,
0.033935546875,
-0.052490234375,
0.07373046875,
-0.037109375,
-0.057861328125,
0.0189208984375,
0.02099609375,
0.0142822265625,
-0.005340576171875,
-0.01287841796875,
0.0181884765625,
-0.0031280517578125,
-0.02978515625,
-0.04663085937... | 33,248 | 33248 | |
Homework Help
Posted by Bryan on Thursday, January 26, 2012 at 9:04pm.
Assume that you have 6 different types of vegetables and 9 different types of fruit. A vegetable salad consists of a mixture of any 3 types of vegetables, and a fruit salad consists of a mixture of 3
kinds of fruit.
(1) In how many different ways ... | 4 | [
0.043701171875,
-0.0625,
0.046630859375,
-0.0079345703125,
0.028564453125,
0.06689453125,
0.0012969970703125,
-0.0576171875,
0.01611328125,
-0.043701171875,
0.0537109375,
-0.051513671875,
0.047119140625,
-0.07568359375,
0.0198974609375,
0.01092529296875,
0.0159912109375,
0.03320312... | 33,249 | 33249 | |
Homework Help
Posted by Anonymous on Wednesday, October 3, 2012 at 1:23am.
a trapezoid abcd has parallel sides ab and dc of lengths 8 and 22. If both diagonals AC and BD are of length 17, what is the area of the trapezoid
• fd - Steve, Wednesday, October 3, 2012 at 10:10am
the excess length of dc over ab is 22... | 4 | [
0.05126953125,
0.12158203125,
0.010986328125,
-0.043701171875,
0.026611328125,
-0.0018157958984375,
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0.0947265625,
-0.072265625,
0.0223388671875,
0.06787109375,
-0.031982421875,
-0.01544189453125,
-0.033203125,
-0.0023345947265625,
0.053466796875,
-0.04345703125,
-0.00... | 33,250 | 33250 | |
Questions about Dot Product (Vectors)
March 9th 2011, 10:14 AM #1
Newbie
Joined
Mar 2011
Posts
3
Questions about Dot Product (Vectors)
This is my first post here so I'm sorry if this isn't the right section (didn't see a vectors subforum). I am also not sure how to put arrows on top of letters, so assume... | 4 | [
-0.04931640625,
-0.0233154296875,
-0.109375,
-0.123046875,
0.00135040283203125,
0.09228515625,
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-0.0203857421875,
-0.0654296875,
0.0205078125,
0.04150390625,
-0.003997802734375,
0.0294189453125,
-0.01031494140625,
-0.000274658203125,
0.078125,
-0.06640625,
-0.0449218... | 33,251 | 33251 | |
Dividing Polynomials: Remainder.
September 18th 2010, 09:07 AM
anshulbshah
Dividing Polynomials: Remainder.
If the $X^4 - 6x^3 + 16x^2 -25x + 10$ is divided by annother polynomial is divided by another polynomial $x^2 - 2x + k$,the reaminder comes out to be $x+a$,find k and a:
please help at the earliest...h... | 4 | [
-0.0205078125,
0.09326171875,
0.0272216796875,
-0.00872802734375,
0.044189453125,
-0.004119873046875,
0.0322265625,
-0.0091552734375,
0.0196533203125,
0.037109375,
0.0830078125,
-0.0242919921875,
0.01422119140625,
0.04541015625,
-0.045654296875,
0.01177978515625,
-0.07958984375,
0.... | 33,252 | 33252 | |
Determine whether the function is a solution of the DE?
January 31st 2010, 04:34 PM #1
Determine whether the function is a solution of the DE?
Determine whether the function is a solution of the differential equation
y''' - 8y = 0
(a) y = cos(2x)
(b) y = e^(2x)
What exactly is one suppose to do ... | 4 | [
-0.06298828125,
-0.01531982421875,
0.0439453125,
0.0106201171875,
0.0294189453125,
0.08837890625,
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0.053466796875,
0.00191497802734375,
0.031982421875,
0.1005859375,
-0.125,
0.009521484375,
-0.0216064453125,
0.0498046875,
-0.0263671875,
-0.047607421875,
-0.020141601... | 33,253 | 33253 | |
RE: st: ranking with weights
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: st: ranking with weights
From "Nick Cox" <n.j.cox@durham.ac.uk>
To <statalist@hsphsun2.harvard.edu>
Subject RE: st: ranking with weights
Date Tue, 2 Dec 2008 21:59:45 -0000
My bias is to believe my ... | 4 | [
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problem solving, intro to circular functions.
July 5th 2008, 09:15 AM #1
Banned
Joined
Jul 2008
Posts
29
problem solving, intro to circular functions.
If a merry go round makes one revolution every 15 seconds, how far from the center does a person have to stand in order to travel at a linear speed of 5m/... | 4 | [
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Integral
February 18th 2010, 10:43 AM
naomi
Integral
Hi,
I am trying to solve ∫ln(t)^2 dt. I already solved part of the integral, however I don't know how to complete the exercise. Can someone help me? Thanks.
∫ln(t)^2 dt
u=ln(t)^2 dv=dt
du=2ln(t)*(1/t)dt v =t
t*ln(t)^2-∫t*2ln(t)*(1/t)dt
... | 5 | [
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Alternating Series - Converges or Diverges
July 16th 2009, 06:33 AM #1
Junior Member
Joined
May 2009
Posts
53
Alternating Series - Converges or Diverges
Question:
Test the series for convergence or divergence.
$<br /> sn = \sum (-1)^n \frac{2n-1}{5n+1}<br />$
My attempt:
This is an alt... | 5 | [
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Homework Help
Posted by greeny on Wednesday, October 3, 2012 at 12:25am.
solve for x in the interval zero to two pi.
2 sin 4x = 1
i got 5 pi/24 and pi/ 24 but my teacher said that there should be eight solutions. what would those be and how would i find it"
• PRECALC - Bosnian, Wednesday, October 3, 2012 at 7:35a... | 4 | [
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st: Question about Simulated MLE using d1 method
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index... | 4 | [
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... | 33,259 | 33259 | |
Proof by induction stuck on trigonometric sum :help:
December 15th 2008, 10:31 AM
ssadi
Proof by induction stuck on trigonometric sum :help:
How do I convert:
$tan(k+1)\theta cot\theta-k-1+tan(k+1)\theta tan(k+2)\theta$
$=tan(k+1)\theta[cot\theta+tan(k+2)\theta]-k-1$(As far as I could get)
Into:
... | 5 | [
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0.002410888671875,
... | 33,260 | 33260 | |
Euler Totient Function
June 3rd 2010, 03:01 PM #1
Euler Totient Function
This thread got me thinking...
Define $\varphi_0(n)=n,\; \varphi_1(n)=\varphi(n),\; \varphi_2(n)=\varphi(\varphi(n))$ and so on...
Now Define $I(n)$ to be the smallest integer such that $\varphi_{I(n)}(n)=1$.
I've found some b... | 5 | [
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-0.... | 33,261 | 33261 | |
Polynomial Division
August 26th 2008, 05:40 AM #1
MHF Contributor
Joined
Jul 2008
From
NYC
Posts
1,489
Polynomial Division
I divided (-4x^3 + x^2 - 4)/(x - 1) and got a totally different answer on three attempts than the book.
Here is the right answer:
-4x^2 - 3x - 3 remainder -7
How c... | 4 | [
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Homework Help
Posted by Stacey grahaM on Monday, May 3, 2010 at 11:50pm.
Tan theta 12/5 ,pi <theta<3pi/2
Find sin 2theta
• Trig - drwls, Tuesday, May 4, 2010 at 2:07am
Think of a 5,12,13 right triangle. The principle angle (to the -y axis) is arcsin 12/13
Theta is in the third quadrant, and therefore
... | 4 | [
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ASTB Mechanical Comprehension Test
ASTB Mechanical Comprehension Test
229 cards
IE or Firefox are the preferred browsers. For each question, select the option that is most nearly correct. If you answer the questions in order:the ASTB Study Supplement Book Math Skills start from
#208-228, consisting of questions form... | 4 | [
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Homework Help
Posted by anonymous on Thursday, February 10, 2011 at 11:03pm.
Pat Kan owns a factory that manufactures souvenir key chains. Her weekly profit (in hundreds of dollars) is given by P(x)=-2x^2+60x-120, where x is the number of cases of key chains sold.
a) what is the largest number of cases she can sell a... | 4 | [
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Evaluating integrals
May 5th 2009, 11:23 AM
bosmith
Evaluating integrals
Can someone please help me to evaluate these integrals
ò sin ^5 x dx
ò tan 3 x dx
Do I simply apply rule one for adding the the exponent and placing the same exponent in the denominator? Do I substitue -cos for sin? Do I substit... | 5 | [
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0.03369140625,
0.067871093... | 33,266 | 33266 | |
two series questions
February 26th 2008, 10:15 AM #1
Newbie
Joined
Oct 2007
Posts
23
two series questions
Hi all,
I had two questions
1. $\sum ^{\infty}_{i=1} \frac{1}{\left(i-1\right)!} \frac{d}{d\lambda} \left(\lambda^{i}\right)= \frac{d}{d\lambda} \sum ^{\infty}_{i=1} \frac{1}{\left(i-1\righ... | 5 | [
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rocket in my pocket
January 8th 2007, 09:21 AM #1
Newbie
Joined
Nov 2006
Posts
18
rocket in my pocket
How would you go about solving this?
A rocket is fired into the air and it's height in metres at any given time t seconds can be calculated by h(t)=225+ 49t-0.98t(squared). Find the maximum height o... | 4 | [
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cartesian inequality
May 15th 2008, 06:17 AM #1
Junior Member
Joined
Mar 2008
From
Perth
Posts
26
cartesian inequality
Find the Cartesian inequation for the region represented by
abs(z+9-9i)<=1/7*abs(z-3-2i)
Please put your answer in a "natural" form
What is the centre of that circle for... | 4 | [
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Percentage error.
August 4th 2010, 11:44 AM #1
Newbie
Joined
Aug 2010
Posts
4
Percentage error.
Please can anyone help solve this? Many Thanks
The side a of a triangle ABC is calculated from the following formula:
a/SIN (A) = b/ SIN (B)
where lower case refers to the sides and upper case r... | 5 | [
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sim equations
September 11th 2009, 08:42 PM #1
sim equations
Solve the following equations algebraically
2x + y = 0
−2x −3y = 8 im stuck i can do the easy ones when in the format y=mx+c
Thee's generally two ways to do these, but I'll hint towards the addition method because it is alreaddy set up
... | 4 | [
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-0.02026367... | 33,271 | 33271 | |
Error in the normal approximation to the binomial distribution
The binomial distribution can often be well approximated by a normal distribution. But how can you know when the approximation will be good? Most textbooks are vague on this point, saying “n should
be large” or “np should be large.” How large? Why?
These ... | 4 | [
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Homework Help
Posted by JESSICA on Monday, October 15, 2007 at 9:31pm.
I got this problem but its unrelated to any material that we worked on. Can some please help me to solve it and please explain it. Thanks
Problem states:
Given:
x+(1/x)= square root of 3
PROVE:
(x^13)+(1/(x^13))= square root of 3
• CALCULUS... | 5 | [
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Re: additional regular expression operators
torbenm@pc-003.diku.dk (Torben =?iso-8859-1?Q?=C6gidius?= Mogensen)
Fri, 17 Apr 2009 11:05:31 +0200
From comp.compilers
| Li... | 4 | [
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Factoring Binomials
March 25th 2007, 07:03 PM
Cait
Factoring Binomials
For college beginning algebra.
~Please explain every step because I'm mathmatically stupid~
Problem:
5k^3+40
The answer is SUPPOSIDLY 5(K+2)(K^2-2K+4)
but i dont see how they get it.
Here's the example they ... | 4 | [
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0.03442382812... | 33,275 | 33275 | |
Order statistics
June 18th 2013, 05:14 PM #1
Member
Joined
Feb 2011
Posts
83
Thanks
2
Order statistics
Let $Y_1, ... , Y_n$ be the order statistics of a random sample of size $n$ from a uniform distribution on the interval (0,2).
What is $P[Y_1 < \frac{1}{2} < Y_n]$
If $U_1, ... , U_n$ are ... | 5 | [
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0.0400390625,
0.0155029296875,
0.06396484375,
-0.1... | 33,276 | 33276 | |
inside-R
solve.bigz {gmp}
Solve a system of equation
Description
This generic function solves the equation a %*% x = b for x, where b can be either a vector or a matrix.
If a and b are rational, return is a rational matrix.
If a and b are big integers (of class bigz) solution is in Z/nZ if there is a common modul... | 5 | [
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-0.0026397705078125,
-0.049804... | 33,277 | 33277 | |
Vector Acceleration
March 19th 2011, 10:38 AM #1
Member
Joined
Oct 2009
Posts
80
Vector Acceleration
Find the acceleration vector in terms of ur and u x.
r = a(4 - cos x) and dx/dt = 6
v(t) = r' (t) = a(4 +sinx) + (4-cosx) (1)
ll v(t) ll = sqrt( a^2 + (4-cox)^2) = sqrt(a^2 + (16 - cos x)^4... | 4 | [
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-0.0751953125,
0.049072265625,
0.0194091796875,... | 33,278 | 33278 | |
.999... = 1?
April 4th 2005, 03:34 PM
Yankee77
.999... = 1?
I have heard that .999 with a repeating 9 equals exactly 1.
Can someone please discuss this here?
Why is it true?
April 4th 2005, 04:09 PM
Math Helper
Try this
Here is a cool way to come to terms with it though it is not a proof (I'll l... | 4 | [
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-0.03173828125,
0.038330078125,
0.03015... | 33,279 | 33279 | |
Intersections Q
October 23rd 2009, 11:26 PM
vuze88
Intersections Q
4 distinct parabolas and 3 distinct circles are drawn on a large sheet of paper. Find the maximum number of points of intersection of these curves. The answer is 78. Is there a better way than
drawing it out :S
October 24th 2009, 03:24 AM
H... | 4 | [
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-0.0439453125,
-... | 33,280 | 33280 | |
Laplace Transforms
2
discontinuity produces a delta function must be embraced fromthe outset. The subtitle of this article, “Troubles at the origin,”was inspired by Section 3-6 of [27], which identifies thenecessity of
distinguishing between
0
−
and
0
+
. However, thesubsequent reasoning in [27], which relies on ... | 5 | [
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0.08203125,
0.0130615234375,
0.12255859375,
-0.03857421875,
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0.033447265625,
0.01275634765625,
-0.146484375,
-0.043701171875,
-0.0103759... | 33,281 | 33281 | |
another root integral
February 9th 2013, 10:56 PM #1
Member
Joined
Aug 2011
Posts
76
Thanks
1
another root integral
Hi. As usual, struggling with basic integration stuff I'm already supposed to have mastered. Could somebody point me in the right direction with the following integral? I'm thinking may... | 4 | [
0.01312255859375,
-0.08349609375,
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0.0213623046875,
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0.006500244140625,
-0.0070800781... | 33,282 | 33282 | |
How do you solve a quadratic equation where b = the sum of square roots?
October 15th 2010, 02:03 AM #1
Newbie
Joined
Oct 2010
Posts
2
How do you solve a quadratic equation where b = the sum of square roots?
I understand the quadratic formula. I can derive the quadratic formula. I do not understand what ... | 4 | [
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... | 33,283 | 33283 | |
Homework Help
Posted by JP on Thursday, September 22, 2011 at 9:03pm.
Stan takes a trip, driving with a constant velocity of 81.5 km/h to the north except for a 22 min rest stop. If Stan's avg velocity is 66.80 km/h to the north, how long does the trip take?
• Physics - Steve, Friday, September 23, 2011 at 2:01pm
... | 4 | [
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Question regarding finding the tangent line to a point on a curve
September 30th 2011, 09:59 AM #1
Newbie
Joined
Sep 2011
Posts
11
Question regarding finding the tangent line to a point on a curve
So, I have been working problems finding the derivative of polynomial equations. I am having some problems, ... | 4 | [
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... | 33,285 | 33285 | |
integrate problem
hi just confused on this integration. $<br /> \int xcosx<br />$ how would i go about solving?
There are many techniques. One such is integration by parts. You'll find it done as an example somewhere in here: http://en.wikipedia.org/wiki/Integra...#More_examples.
$\frac{dy}{dx} = \sin x + x \cos x$ I... | 5 | [
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Maximum Value
January 4th 2009, 03:29 PM #1
Newbie
Joined
Jan 2009
Posts
13
Maximum Value
What is the maximum value of f(x)= (x^4) + (x^3) - ((17/4)x^2) + (1/2)x on the interval [-2,2] ?
I took the derivative of the function and then I set it to 0, and then I factored to get values for x. I got posi... | 4 | [
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Complex Number in its simplest form
July 21st 2010, 06:40 AM #1
Newbie
Joined
Jul 2010
From
Qatar
Posts
15
Complex Number in its simplest form
Hi all. Not sure whether this is correct or not and I would like some guidance! Thanks...
Given that z1 = 4-j5 and z2 = -3+j4, Find the compelx number z1... | 4 | [
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Solve using trig identities
October 28th 2010, 06:15 PM
inspire
Solve using trig identities
$sin(3t)=\frac{\sqrt3}{2}$
First off, let me just say that I know how to solve it by taking the arcsin and then dividing by 3, that isn't what I need to do.
It needs to be like this:
$sin(2t+t)$
I know ... | 4 | [
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0.... | 33,289 | 33289 | |
3. Simplest Radical Form
Before we can simplify radicals, we need to know some rules about them. These rules just follow on from what we learned in the first 2 sections in this chapter, Integral Exponents and Fractional
Exponents.
Expressing in simplest radical form just means simplifying a radical so that there are ... | 4 | [
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Latin American applied research
Servicios Personalizados
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versión impresa ISSN 0327-0793
Lat. Am. appl. res. v.36 n.2 Bahía Blanca abr./jun. 2006
On-line costate integration for nonlinear control
V. Constanza^1 and C. E. Neuman^2
^1 Instituto de Desarrollo Tec... | 4 | [
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Homework Help
Posted by Ann on Wednesday, October 19, 2011 at 10:39am.
Suppose you have a cookie stand, and when you charge $3 per cookie box you sell 250 boxes. But when you raise your price to $4 you only sell 120 boxes.
a. Write an equation for the number of boxes you sell as a function of the price you charge.
b... | 4 | [
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... | 33,292 | 33292 | |
Harmonics
February 16th 2008, 09:53 AM
Bajan
Harmonics
Hello friends!
Question is:
The harmonic mean of 2 numbers, a and b is
____2____
_1_ + _1_
a______b
The harmonic mean of 3 numbers, a, b and c, is
______3______
_1_ + _1_ + _1_
a______b____c
a) Simplify the expressi... | 4 | [
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0.0164794921875,
... | 33,293 | 33293 | |
Galois Theory Question
May 4th 2012, 02:09 PM #1
Galois Theory Question
Let E = Q(α,ω), α = 2^1/3, ω = e^2^π^i^/3, (Q is the field of rationals)
Is E a simple extension of Q?
My attempt:
Let β = α + ω, find a monic irreducible polynomial, p in Q[x] with root β.
p should have degree 6, implying E ... | 5 | [
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-0.017944... | 33,294 | 33294 | |
estimate integral
August 25th 2007, 12:36 PM #1
Junior Member
Joined
Aug 2007
From
Houston, TX
Posts
46
estimate integral
Estimate
ln 1.5 = (integral from 1 to 1.5) dt/t
using the approximation (1/2)[Lf(P) + Uf(P)] with
P = {1 = (4/4) , (5/4), (6/4) , (7/4) , (8/4), (9/4), (10/4) = (5/... | 5 | [
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regular category
Context
Regular and Exact categories
Category Theory
Concepts
Universal constructions
Theorems
Extensions
Applications
Contents
Idea
A regular category is a finitely complete category which admits a good notion of image factorization. A primary raison d’etre behind regular categories $C$ is t... | 4 | [
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Homework Help
Posted by Watermelon on Wednesday, November 30, 2011 at 11:25pm.
The 9th term of an arithmetic progression is 4+5p and the sum of the four terms of the progression is 7p-10, where p is a constant.
Given that common difference of the progression is 5, find the value of p.
• AP Calculus - Steve, Thursd... | 4 | [
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Proving an identity
October 12th 2009, 01:29 PM #1
Proving an identity
Let $S,W$ be subspaces of $V$ where $V$ is a vector space with inner product and $\dim V=n,$ show that $(S\cap W)^\perp=S^\perp+W^\perp.$
No idea how to show this!
Hi-Outlines of the proof.
1. $S^\perp+W^\perp \subseteq (S\cap W... | 5 | [
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First-order nonlinear ODE with a parameter
January 14th 2010, 06:22 AM
Ment
First-order nonlinear ODE with a parameter
Help me with this equation with a parameter $a$. I can not even guess how I begin to solve it.
$y^3dy - (y^2+ax)dx = 0$
Thanks!
January 14th 2010, 10:02 AM
DeMath
Quote:
$... | 5 | [
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