content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Differential Equation Mixing Problem
April 30th 2010, 06:40 AM #1
Newbie
Joined
Apr 2010
Posts
2
Differential Equation Mixing Problem
I'm having a bit of trouble with some questions, I'm not sure whether it is from deficiancies in D.E or integration and would like some help if possible.
so here's an... | 5 | [
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... | 34,500 | 34500 | |
Matrix equation
October 19th 2012, 07:33 AM #1
Junior Member
Joined
Sep 2012
From
Toronto
Posts
36
Matrix equation
Given the matrix equation
$X^{-1}A^{T} + B^{-1}C = 0$
Where $A,B,C,$ and $X$ are 2 x 2 invertible matrices. Solve for $X$ in terms of $A,B,C$.
ii) Find X when $A = \begin{... | 5 | [
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Minimum value of this particular trigonomterical function : really interesting
May 26th 2011, 05:50 AM
souro11
Minimum value of this particular trigonomterical function : really interesting
First take a look at the problem :
Find the minimum value of the trigonometrical function : $y = 4{\sin }^{2 }x + 9{\(... | 5 | [
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Optimal Investment Strategies for DC Pension with Stochastic Salary under the Affine Interest Rate Model
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 297875, 11 pages
http://dx.doi.org/10.1155/2013/297875
Research Article
Optimal Investment Strategies for DC Pension with Stochastic Salary un... | 4 | [
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I need help to prove this in Linear Algebra
March 19th 2013, 12:17 PM
TrystanandEmma1
I need help to prove this in Linear Algebra
If The linear transformation x → Ax maps Rn onto Rn.
then
The columns of A span Rn.
I proved the other way...but in order for this proof to be complete...I need to prove... | 4 | [
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Construct the series
September 24th 2012, 09:06 PM #1
Member
Joined
Sep 2010
Posts
149
Thanks
3
Construct the series
$f(z) = \sum_{n=0}^{\infty}\frac{a_n}{z^n}$ for the function $\frac{z-1}{z+1}$
so i have that $\frac{z-1}{z+1} = 1 - \frac{2}{z+1}$
does that mean i expand the function at $z... | 5 | [
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Trig Question - Urgent
March 5th 2008, 09:25 PM
sqleung
Trig Question - Urgent
Sorry for bothering you again but this is rather (very?) urgent. I have one question that I want to ask and if you could help me, it would be greatly appreciated. Also, would you be able to do
them in radian measure and give the e... | 5 | [
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Homework Help
Posted by Amy on Friday, June 1, 2012 at 4:05am.
A carpenter wants to cut an 18-foot board into two pieces so that one piece is 3 feet shorter than twice the shorter piece. Where should he make the cut?
---?--- ft from one end
• Math - Bosnian, Friday, June 1, 2012 at 4:28am
L = length of board ... | 4 | [
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scipy.optimize.leastsq
Minimize the sum of squares of a set of equations.
x = arg min(sum(func(y)**2,axis=0))
y
func : callable
should take at least one (possibly length N vector) argument and returns M floating point numbers.
x0 : ndarray
... | 4 | [
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Ugh! Circle problems
October 9th 2008, 05:36 PM #1
Member
Joined
Apr 2008
Posts
107
Ugh! Circle problems
1) Find an equation with center on the line y =3x and tangent to y-axis with coordinates (0,2).
2) Find an equation for the tangent of a circle (x-3)^2 + (y+2)^2 = 13 on the points (0, -4).
... | 4 | [
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Concavity
April 13th 2010, 09:16 AM #1
Newbie
Joined
Apr 2010
Posts
19
Concavity
Short problem. Determine where the given function is concave up and where it is concave down.
f(x)= 10x^3 - 3x^5
Thanks.
Concavity is shown by the second derivative. Find the second derivative and go from ther... | 4 | [
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8.6 Vector Bundles and regular schemes
Next: 8.7 Action of correspondences Up: 8 Algebraic Schemes for Previous: 8.5 The category of
Most of the examples of vector space schemes that we have seen so far are vector bundles; these are vector space schemes that are ``locally'' isomorphic to ^n for some fixed n. In ot... | 4 | [
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Homework Help
Posted by Christine on Sunday, June 17, 2012 at 5:21pm.
If you know that the period of a pendulum is 1.87sec. What is the length of that pendulum? (gravity 9.81m/sec squared)
• Physics - Damon, Sunday, June 17, 2012 at 5:53pm
F = m A
m g sin theta = m a = -m d^2 x/dt^2
g sin theta = -d^x/... | 5 | [
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Equation help
Can someone help me to solve this equation for x and y? $5x^2+5y^2+8xy+2y-2x+2=0$
OReilly Hello, the bad news first: I cann't show you how to solve this equation. I only can give you the solution, which I found by trial and error: x = 1; y = -1. Your equation describes how to get
the zeros of an elliptic... | 5 | [
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Math Help
April 1st 2010, 11:43 PM #1
Junior Member
Joined
Mar 2010
Posts
60
Spheres
I'm very sory for asking another question, but I'm just preparing a final exam, which means that i solve something like 20 Problems a day, so I get confused from time to time
The Sphere S intersects the plane P in ... | 4 | [
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Engineering Economy
Posted by John on Monday, September 24, 2007 at 10:35am.
A realtor sold a house on August 31, 1997 for $150k to a buyer in which a 20% down payment was made. The buyer took a 15yr mortgage on the property with an effective interest rate of 8% per annum.
The buyer intends to pay off the mortgage owe... | 5 | [
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LilDragonfly's Regression Q2
June 12th 2006, 11:05 PM #1
Grand Panjandrum
Joined
Nov 2005
From
someplace
Posts
14,972
Thanks
4
LilDragonfly's Regression Q2
This is posted on behalf of LilDragonfly.
Below is a data set called "Ice-cream data". It gives the sales in
millions of dollars o... | 5 | [
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Basis and Eigenvalues
March 16th 2009, 07:34 PM #1
Member
Joined
Oct 2008
Posts
130
Basis and Eigenvalues
V is an n dimensional vector space over F. A is a linear transformation from V to itself.
Prove that if V has a basis of eigenvectors for A, then the matrix representing A with respect t this ba... | 4 | [
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factor
November 29th 2010, 03:30 PM
IDontunderstand
factor
1-2sin^2x+sin^4x
I believe the answer is cos^4x
I want to say that 1-2(1+sin^2x)(sin^2x) if I move it around I get
I do not know where to go next or how it is cos^4x
November 29th 2010, 03:37 PM
dwsmith
Double angle formulas may hel... | 4 | [
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Integration
July 30th 2009, 09:18 AM #1
Integration
Hi i am completely stuck trying to integrate the following function.
f(x) = (x + 2)(1 - e^ -x/3).
Do i try and expand the brackets before i start?
I tried doing it as a substitution using 1-e^-x/3 as u and
du = 1/3 e^ -1/3x but that isn't one con... | 5 | [
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Homework Help
Posted by Anonymous on Sunday, February 21, 2010 at 8:04am.
In the sequence: x+4y ; 2y+2 ;x ;y-1, (consisting of 4 terms) the first three terms form an arithmetric progression, while the last three tern form a geometric sequence. Calculate the values of x and
y. Answer(s) can be left in surd form.
• m... | 4 | [
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Temperature
Thermometers are used to measure temperature according to well-defined scales of measurement, which use pre-defined reference points to help compare quantities. The three most common temperature
scales are the Fahrenheit, Celsius, and Kelvin scales. A temperature scale can be created by identifying two easi... | 4 | [
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Homework Help
Posted by julia on Sunday, January 24, 2010 at 6:38pm.
how do I solve : 1/2 + 2/x =3/4.
thanks for helping!
• math - Judy, Sunday, January 24, 2010 at 7:15pm
x+2.2=3/4
over 2x
x+4=3/4
over 2x
2x+2.4=3x
2x+8=3x
answer: 8=x
• math - julia, Sunday, January 24, 2010 at ... | 4 | [
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How are these two items equal?
August 31st 2010, 08:39 PM #1
Newbie
Joined
Aug 2010
Posts
1
How are these two items equal?
Can someone show me how
$Sqrt(x)/x$
is equal to $1/Sqrt(x)$?
I know I can flip the denominator to:
$1/X * Sqrt(x)$
But I still can't understand how it gets to... | 4 | [
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A General Algorithm to Calculate Third Order Intermodulation Product
many intermodulation products lie within the system bandwidth. Intermodulation distortion
... | 4 | [
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A plane flies horizontally at an altitude of 5 km
Posted by yolana on Monday, March 14, 2011 at 8:00pm.
A plane flies horizontally at an altitude of 5 km and passes directly over a tracking telescope on the ground. When the angle of elevation is π/3, this angle is decreasing at a rate of π/4 rad/min.
How fast is the p... | 4 | [
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Two Conic equations!
March 4th 2007, 02:42 PM #1
Newbie
Joined
Dec 2006
Posts
10
Two Conic equations!
Well the teacher didn't get to this section and teaching myself did not work well lol.. I partly understand to an extent.
The first example goes like
Sketch the graph of the equation r = 3/(2-2s... | 4 | [
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Journal of the Brazilian Society of Mechanical Sciences and Engineering
Services on Demand
Article
Indicators
Related links
Share
Print version ISSN 1678-5878
J. Braz. Soc. Mech. Sci. & Eng. vol.32 no.spe Rio de Janeiro Dec. 2010
http://dx.doi.org/10.1590/S1678-58782010000500001
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-0.01031494140625,
0.015869140625,
0.03173828125,
-0.0712890625,
0.009765625,
-0.016845703125,
-0.044189453125,
-0.0224609375,
-0.043212890625,
-0.000637054443359375,
... | 34,527 | 34527 | |
Statistical probility, baye's theorem
December 22nd 2011, 01:14 AM
brentvos
Statistical probility, bayes' theorem
Hi,
I am looking for a solution to the following problem, which according to the question can be solved using bayes' theorem:
The same event occurs a 1000 times
Every time, the chance o... | 5 | [
-0.05029296875,
0.08544921875,
0.023193359375,
-0.091796875,
-0.012451171875,
-0.0167236328125,
0.05517578125,
0.05126953125,
0.03125,
0.07421875,
0.07763671875,
-0.002593994140625,
0.0439453125,
0.03857421875,
-0.0703125,
-0.00592041015625,
0.04248046875,
-0.011962890625,
-0.055... | 34,528 | 34528 | |
Solving Inequality
September 23rd 2009, 07:09 AM #1
Junior Member
Joined
May 2009
Posts
51
Solving Inequality
$\frac {-4x^2} {2-x} < 2-4x$
im not sure about my result.
as far i can see i must look at 2 cases. 1st: x > 2 and 2nd x < 2
the first would give me the solution: $-\frac {2} {3} < ... | 4 | [
-0.00018215179443359375,
-0.040771484375,
0.049072265625,
-0.0274658203125,
-0.059326171875,
-0.06640625,
-0.078125,
0.07666015625,
0.03662109375,
-0.033203125,
-0.0162353515625,
-0.031494140625,
0.068359375,
0.005950927734375,
0.044677734375,
0.06396484375,
0.09814453125,
-0.11181... | 34,529 | 34529 | |
3 Calculus Questions
March 22nd 2007, 04:24 PM
turtle
3 Calculus Questions
If anybody could please help me with the following problems I'd greatly appreciate it.
1. A point moves along the curve y = x^2 + 1 so that the x-coordinate is increasing at the constant rate of 3/2 units per second. The rate, in uni... | 5 | [
-0.040283203125,
-0.0390625,
0.076171875,
-0.07666015625,
0.0546875,
-0.03271484375,
-0.0230712890625,
0.048583984375,
0.05126953125,
0.0301513671875,
0.04248046875,
-0.03271484375,
0.038818359375,
0.04296875,
-0.06591796875,
-0.0380859375,
-0.03369140625,
-0.064453125,
-0.077148... | 34,530 | 34530 | |
Homework Help
Posted by Tammie on Saturday, October 8, 2011 at 9:04pm.
Could someone show me how to solve these two problems-I have 10 of each kind to do this weekend and I'm really lost
1. Find product of 8(cos pi/2 + i sin pi/2) * 1/2(cos pi/6 + i sin pi/6)
2. Same problem but find quotient instead of product
Ple... | 4 | [
-0.1357421875,
0.046630859375,
-0.0098876953125,
0.0167236328125,
-0.011474609375,
-0.00836181640625,
0.00360107421875,
0.0281982421875,
0.03369140625,
-0.04736328125,
0.10302734375,
-0.1279296875,
0.0269775390625,
0.053955078125,
0.04052734375,
-0.039306640625,
-0.0947265625,
0.06... | 34,531 | 34531 | |
Linear math help
November 18th 2008, 05:11 AM #1
Newbie
Joined
Jan 2008
Posts
21
Linear math help
I'm trying to show that if $AB - I_n$ is invertible then:
$B(AB-I_n)^{-1}A - I_n = (BA-I_n)^{-1}$
I have no idea where to start...?
Yes that's an interesting exercise:
Let $R$ be a ring, $... | 5 | [
-0.10400390625,
0.027099609375,
-0.017578125,
0.030517578125,
-0.03759765625,
-0.05615234375,
0.09228515625,
-0.03564453125,
-0.09716796875,
-0.08984375,
-0.06982421875,
0.005859375,
0.0693359375,
-0.043701171875,
-0.0272216796875,
0.0439453125,
0.06982421875,
0.0250244140625,
-0... | 34,532 | 34532 | |
Proof - Definite Integral, Power Rule
January 25th 2010, 05:18 PM #1
Newbie
Joined
Jan 2010
Posts
14
Proof - Definite Integral, Power Rule
Preface
This is a problem from Courant and Robbins' What is Mathematics?, Chapter 8: "The Calculus", page 409-410.
Also, I apologize if the format of this po... | 5 | [
-0.039794921875,
0.09375,
0.00665283203125,
-0.005096435546875,
0.0235595703125,
-0.052978515625,
0.09326171875,
-0.005889892578125,
0.020263671875,
-0.003387451171875,
-0.0390625,
-0.0166015625,
0.10009765625,
0.050048828125,
-0.03369140625,
0.053955078125,
0.0242919921875,
0.0179... | 34,533 | 34533 | |
Application of calculus
January 29th 2011, 04:55 AM #1
Junior Member
Joined
Jan 2010
Posts
65
Application of calculus
Could someone please tell me how to calculate the following...?
The angular displacement Θ radians of a flywheel varies with time $"t"$seconds and follows the equation Θ $= 9t^2 - 2t... | 5 | [
-0.051513671875,
0.0042724609375,
0.034912109375,
-0.0194091796875,
-0.005706787109375,
0.0260009765625,
-0.05224609375,
0.11376953125,
0.0189208984375,
0.017578125,
0.09619140625,
-0.01318359375,
-0.004913330078125,
0.03369140625,
-0.068359375,
0.042724609375,
-0.08251953125,
0.04... | 34,534 | 34534 | |
Accumulation point proof. Need assistance.
October 12th 2013, 12:13 PM #1
Junior Member
Joined
Apr 2013
From
Green Bay
Posts
68
Thanks
16
Accumulation point proof. Need assistance.
Problem: Prove that a real number s_0 is an accumulation point of a set S if and only if there exists some sequence... | 5 | [
-0.09326171875,
0.00360107421875,
0.04150390625,
-0.04052734375,
0.0693359375,
0.09619140625,
0.08056640625,
0.056884765625,
0.056884765625,
-0.06884765625,
0.034423828125,
-0.02587890625,
0.09765625,
0.01116943359375,
0.01104736328125,
-0.0380859375,
0.0771484375,
-0.0546875,
0.... | 34,535 | 34535 | |
Transformation using matrices (algebra help)
May 8th 2009, 10:25 PM #1
Transformation using matrices (algebra help)
I'm stuck on simplifying this:
$\frac{-1}{2}x' + \frac{\sqrt3}{2}y' = \frac{-\sqrt3}{2}x' - \frac{1}{2}y' + 4$
The negative is apart of the entire fraction, not just the numerator.
I ... | 5 | [
-0.006866455078125,
-0.03173828125,
-0.025634765625,
-0.050048828125,
0.0732421875,
-0.0296630859375,
-0.05029296875,
-0.0771484375,
0.026611328125,
0.03857421875,
0.10986328125,
-0.038330078125,
-0.026123046875,
0.0294189453125,
-0.0322265625,
0.025146484375,
0.0034637451171875,
0... | 34,536 | 34536 | |
Homework Help
Posted by AH on Friday, November 2, 2012 at 1:07pm.
A man starts walking north at 5 ft/s from a point P. Five minutes later a woman starts walking south at 4 ft/s from a point 500 ft due east of P. At what rate are the people moving apart 15 min after
the woman starts walking?
• Math - Reiny, Friday, ... | 5 | [
-0.0216064453125,
0.0478515625,
0.0034332275390625,
-0.05224609375,
0.040283203125,
0.06640625,
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0.048583984375,
-0.051513671875,
0.0281982421875,
0.08349609375,
-0.0361328125,
-0.01025390625,
0.0380859375,
-0.040771484375,
0.054931640625,
0.00701904296875,
-0.010559... | 34,537 | 34537 | |
Quick Matrices Help, if A⁻¹ B C D⁻¹ A = I, then C = ?
April 18th 2012, 01:21 AM #1
Newbie
Joined
Apr 2012
From
Sydney, Australia
Posts
3
Quick Matrices Help, if A⁻¹ B C D⁻¹ A = I, then C = ?
Hi guys,
My first post!
Just revising these matrices for an exam tomorrow. I can solve easy ones, li... | 4 | [
-0.11669921875,
0.022705078125,
-0.01611328125,
-0.0245361328125,
-0.004913330078125,
-0.031005859375,
0.0478515625,
-0.018798828125,
-0.00897216796875,
0.057373046875,
0.046875,
-0.07763671875,
0.041015625,
0.046142578125,
0.0140380859375,
0.09228515625,
0.0189208984375,
0.0520019... | 34,538 | 34538 | |
Find order of this element
October 4th 2010, 06:31 AM #1
Junior Member
Joined
Sep 2009
Posts
42
Find order of this element
Let G be a finite group that has the properties that it contains 2 elements a and b such that:
1. $a^5=e$
2. $aba^- ^1 =b^2$
3. a ≠ e
4. b ≠ e
Find O(b).
N... | 5 | [
-0.01239013671875,
0.054443359375,
0.0203857421875,
0.0966796875,
-0.038818359375,
-0.0498046875,
-0.00104522705078125,
-0.10546875,
0.0205078125,
-0.040283203125,
-0.004302978515625,
0.04541015625,
0.018310546875,
-0.0517578125,
-0.037841796875,
0.140625,
0.023193359375,
-0.025390... | 34,539 | 34539 | |
Doing a Cartesian Product/Direct Sum?
February 17th 2009, 10:25 PM #1
Newbie
Joined
Feb 2009
Posts
3
Doing a Cartesian Product/Direct Sum?
Let V = R^2 and W be the subspace generated by w=(2,3). Let U be the subspace generated by u=(1,1). Show that V is the direct sum of W and U. Can you generalize this ... | 5 | [
-0.032958984375,
-0.056884765625,
-0.06787109375,
0.03759765625,
0.02783203125,
0.000141143798828125,
0.06005859375,
-0.0869140625,
-0.0218505859375,
-0.07763671875,
-0.056884765625,
0.01531982421875,
0.037109375,
0.0284423828125,
-0.07958984375,
0.00113677978515625,
-0.05517578125,
... | 34,540 | 34540 | |
What is the relationship of the eigenvectors between 2 similar matrices?
April 28th 2010, 03:40 PM #1
Newbie
Joined
Mar 2010
Posts
18
What is the relationship of the eigenvectors between 2 similar matrices?
Let A and B be similar matrices. Prove that there is a nice relationship between the eigenvectors ... | 5 | [
-0.09521484375,
0.007232666015625,
-0.0238037109375,
-0.083984375,
-0.00311279296875,
0.0277099609375,
0.016845703125,
-0.08544921875,
-0.007232666015625,
-0.07958984375,
0.041748046875,
-0.037109375,
0.040283203125,
0.0128173828125,
0.03271484375,
0.032470703125,
-0.01519775390625,
... | 34,541 | 34541 | |
Simplification
I have been trying to figure out if this problem could be simplified more. $sqrt(cos^2(t) cos(2 sin(t))-sin^2(t))$ Thanks
AHHH, so when I square I take the negative with it, right? for $r'(t)=cost \cdot cos(sint) i - cost \cdot sin(sint) j- sint k$ for $|r'(t)|=\sqrt{(cost \cdot cos(sint))^2 +(-cost \cd... | 4 | [
-0.049560546875,
0.06298828125,
-0.0218505859375,
0.01556396484375,
-0.01519775390625,
-0.050537109375,
-0.0223388671875,
0.07470703125,
-0.00927734375,
0.109375,
0.033203125,
0.0294189453125,
0.08203125,
0.1025390625,
-0.03662109375,
0.006805419921875,
-0.00872802734375,
0.0424804... | 34,542 | 34542 | |
g: P(N)-->(0,1)
May 17th 2010, 05:03 PM #1
Banned
Joined
Sep 2009
Posts
502
g: P(N)-->(0,1)
I am reading the proof for the following theorem:
The sets $P(\mathbb{N})$and $\mathbb{R}$are numerically equivalent.
I understood the part where the author proved the existence of the one-to-one functio... | 4 | [
-0.10009765625,
-0.07568359375,
0.018798828125,
0.00121307373046875,
0.05859375,
0.056396484375,
0.1416015625,
-0.0380859375,
0.041015625,
-0.064453125,
-0.0830078125,
0.04052734375,
0.08837890625,
-0.0634765625,
-0.01092529296875,
-0.08984375,
0.0291748046875,
-0.0458984375,
0.0... | 34,543 | 34543 | |
Homework Help
Posted by Steven on Sunday, June 25, 2006 at 6:51pm.
I dont understand this.
Solve -5x - 6 = -6x^2
Rearrange to
6x^2-5x-6=0
(3x + 2)(2x - 3)= 0
Set each factor equal to zero and solve for x. I hope this helps.
Related Questions
Math - I dont understand this!!! If rstv=1 and stuv=0, which of the fo... | 4 | [
0.0252685546875,
-0.0390625,
0.0245361328125,
0.0167236328125,
0.0036468505859375,
0.10107421875,
0.033203125,
-0.040283203125,
-0.033203125,
-0.015380859375,
0.09765625,
-0.056396484375,
0.0225830078125,
-0.0179443359375,
-0.015625,
0.0966796875,
-0.0859375,
-0.0284423828125,
-0... | 34,544 | 34544 | |
Homework Help
Posted by Anonymous on Thursday, November 22, 2007 at 9:32pm.
please check my answer thanks :)
How much money must be deposited now at 6% interest compounded semiannually to yield an annuity payment of $4,000 at the beginning of each six-month period for a total of five years answer needs to
be rounded ... | 4 | [
0.04541015625,
0.07275390625,
0.0013580322265625,
0.01495361328125,
-0.00885009765625,
-0.041748046875,
0.064453125,
0.024658203125,
-0.05859375,
0.10791015625,
-0.0272216796875,
-0.046875,
-0.01312255859375,
-0.015869140625,
0.0078125,
0.05615234375,
-0.05078125,
-0.017578125,
-... | 34,545 | 34545 | |
Multiple Choice Exam & Jelly Beans in a Bag
February 4th 2010, 04:00 AM #1
Newbie
Joined
May 2009
Posts
16
Multiple Choice Exam & Jelly Beans in a Bag
Probability drives me crazy
I couldn't figure out how it solves
could you help me please
Multiple Choice Exam
Each question on a 5 questi... | 4 | [
0.048828125,
0.0693359375,
0.0458984375,
0.00274658203125,
-0.029296875,
0.0201416015625,
0.1220703125,
0.005340576171875,
0.031982421875,
0.05908203125,
0.0225830078125,
-0.0263671875,
0.07177734375,
-0.00640869140625,
0.0050048828125,
0.016845703125,
0.0086669921875,
-0.013366699... | 34,546 | 34546 | |
More Parametric Equations
March 26th 2008, 11:34 AM #1
Member
Joined
Nov 2007
Posts
83
More Parametric Equations
Find d^2y/dx^2 , as a fuction of t, for the given the parametric equations:
x = 3 - 8cos(t)
y = 5 + cos^3(t)
I don't understand this notation, please help!
It is the 2nd de... | 5 | [
-0.0751953125,
-0.0211181640625,
-0.00049591064453125,
0.026123046875,
-0.0458984375,
-0.02197265625,
-0.01318359375,
0.091796875,
0.032958984375,
-0.00274658203125,
0.08837890625,
-0.003875732421875,
-0.0177001953125,
0.01031494140625,
-0.02099609375,
0.040771484375,
-0.021362304687... | 34,547 | 34547 | |
proof by induction
June 2nd 2010, 11:27 AM #1
Junior Member
Joined
Jan 2009
Posts
46
pls i need help to proof the following by induction technique
(summation) from i=0 to n for x^i= [(1-x^(n+1)]/ [1-x]
where x does not equal to 1
first i substituted the letter i by a
then i thought abou... | 5 | [
-0.07275390625,
0.038330078125,
0.06201171875,
0.060546875,
0.036376953125,
-0.11767578125,
0.11962890625,
-0.0286865234375,
0.01153564453125,
0.04248046875,
-0.06787109375,
-0.08984375,
0.06494140625,
0.02001953125,
-0.0556640625,
0.02685546875,
0.00116729736328125,
-0.01953125,
... | 34,548 | 34548 | |
Homework Help
Posted by D on Thursday, November 11, 2010 at 5:13pm.
A particle moves in a straight line with velocity t^-2 - 1/9 ft/s. Find the total displacement and total distance traveled over the time interval [1,4].
I found out that the total displacement is .4116
But I cannot find the total distance traveled.
... | 5 | [
-0.0234375,
-0.00750732421875,
0.12060546875,
-0.01177978515625,
-0.035400390625,
0.051025390625,
-0.08837890625,
0.08447265625,
0.00164794921875,
-0.0224609375,
0.039306640625,
-0.024658203125,
-0.0157470703125,
0.06298828125,
-0.1240234375,
0.01031494140625,
0.01385498046875,
0.0... | 34,549 | 34549 | |
combn {utils}
Generate All Combinations of n Elements, Taken m at a Time
Description
Generate all combinations of the elements of x taken m at a time. If x is a positive integer, returns all combinations of the elements of seq(x) taken m at a time. If argument FUN is not NULL,
applies a function given by the argumen... | 4 | [
0.0029449462890625,
0.036865234375,
-0.04345703125,
0.0196533203125,
-0.061767578125,
-0.04150390625,
0.10107421875,
-0.0198974609375,
-0.0123291015625,
-0.0057373046875,
0.04052734375,
0.031494140625,
0.002288818359375,
-0.04052734375,
-0.01129150390625,
0.087890625,
-0.03271484375,... | 34,550 | 34550 | |
distinct permutations.............
January 15th 2007, 12:51 AM
m777
distinct permutations.............
hello,
plz try to do these questions.
(a) Find the number of distinct permutations that can be formed using the letters of the word “Mathematics”.
(b) How many integers from 1 through 1000 are mul... | 5 | [
0.039306640625,
-0.01318359375,
0.0098876953125,
-0.057373046875,
-0.05322265625,
0.06787109375,
0.125,
-0.00127410888671875,
0.07763671875,
0.0301513671875,
0.0020599365234375,
-0.0274658203125,
0.08349609375,
-0.00946044921875,
-0.03466796875,
0.03759765625,
-0.041259765625,
0.00... | 34,551 | 34551 | |
normal distribution -help!
February 3rd 2009, 04:46 AM #1
Newbie
Joined
Feb 2009
Posts
5
In a normal distribution 31% of the items are under 45 and 8% are over 64. Find the mean and S.D. of the distribution.
I need some help on the above number. Thanx.
$\Pr(X < 45) = 0.31$.
Find the value $... | 4 | [
0.016845703125,
0.06982421875,
0.08056640625,
-0.01708984375,
-0.07421875,
-0.0015411376953125,
0.036376953125,
0.07666015625,
-0.038330078125,
0.09375,
0.06396484375,
-0.0458984375,
0.11572265625,
-0.045166015625,
0.08251953125,
0.060546875,
0.002655029296875,
-0.06103515625,
-0... | 34,552 | 34552 | |
Number of paths
October 5th 2010, 12:39 AM
usagi_killer
Number of paths
http://img826.imageshack.us/img826/3527/graphk.jpg
a) Write down the adjacency matrix, F.
This part I can do. (Using the convention that loops count as 1 edge)
$F = \begin{bmatrix} 1 & 0 & 1 & 1 \\ 0 & 1 & 1 & 1 \\ 1 & 1 & 1 ... | 5 | [
0.055419921875,
-0.00762939453125,
-0.048583984375,
0.0079345703125,
0.048583984375,
-0.030517578125,
-0.08935546875,
-0.0196533203125,
-0.00885009765625,
0.03369140625,
-0.005645751953125,
0.0047607421875,
-0.03125,
-0.0128173828125,
-0.095703125,
0.0712890625,
-0.0712890625,
-0.0... | 34,553 | 34553 | |
Brazilian Journal of Physics
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Links relacionados
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versão impressa ISSN 0103-9733
Braz. J. Phys. v.34 n.1a São Paulo mar. 2004
http://dx.doi.org/10.1590/S0103-97332004000200029
Hadron-hadron interactions in Coulomb gauge QCD
Sérgio Szpigel^I; G. Krein^II; R... | 4 | [
-0.11865234375,
0.0380859375,
-0.046142578125,
0.10009765625,
0.00335693359375,
0.049072265625,
0.0111083984375,
0.060791015625,
0.0189208984375,
-0.0017852783203125,
0.04833984375,
-0.03369140625,
-0.0419921875,
0.091796875,
0.04833984375,
0.03515625,
-0.006500244140625,
0.0281982... | 34,554 | 34554 | |
Implicit Differentiation word problem
April 4th 2010, 09:05 AM
satx
Implicit Differentiation word problem
"A stone is dropped into a still pond. Concentric circular ripples spread out and the radius of the disturbed area increases at a rate of 16 cm/sec. At what rate does the area of the disturbed
region inc... | 4 | [
0.033447265625,
-0.0172119140625,
0.0299072265625,
0.00262451171875,
-0.00994873046875,
-0.059814453125,
-0.0576171875,
0.038330078125,
0.048583984375,
0.026611328125,
0.08935546875,
0.00592041015625,
0.06982421875,
0.150390625,
0.02880859375,
0.0281982421875,
-0.0172119140625,
0.0... | 34,555 | 34555 | |
Grade 8 Algebra
November 17th 2011, 12:36 AM #1
Junior Member
Joined
Jan 2011
Posts
41
Grade 8 Algebra
Hii!
I have this other piece of practice work that I don't understand.
The method I do understand is for calculating the final amount:
The amount to start with is 21 860
The interest ... | 4 | [
-0.023681640625,
0.123046875,
0.040771484375,
0.032470703125,
-0.037109375,
-0.019287109375,
0.036865234375,
0.039794921875,
-0.0458984375,
0.10693359375,
0.01080322265625,
-0.017822265625,
-0.047119140625,
0.0712890625,
-0.0140380859375,
0.0179443359375,
-0.126953125,
0.0225830078... | 34,556 | 34556 | |
Isomorphic Groups
September 5th 2010, 09:07 PM
demode
Isomorphic Groups
http://img651.imageshack.us/img651/6149/34264939.gif
This is what I've done so far. For the first part of the problem, we decompose 1350. into a product of primes as $3^3.2.5^2$. Then we have
$\mathbb{Z}_{3^3} \oplus \mathbb{Z}_{2}... | 5 | [
-0.10205078125,
0.0252685546875,
0.010498046875,
-0.00927734375,
0.04248046875,
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0.0247802734375,
-0.033935546875,
-0.1455078125,
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0.0419921875,
-0.0155029296875,
0.01324462890625,
-0.01220703125,
-0.05419921875,
0.0296630859375,
-0.05419921875,
0.013... | 34,557 | 34557 | |
High school math grades 9-12
WHAT THEY NEED TO KNOW
In high school, students will use a deeper understanding of mathematics to solve real-world problems. While in elementary and middle school, the math skills children need to know are organized by
grade level, in high school they are grouped by concepts — such as alge... | 4 | [
0.01068115234375,
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-0.08447265625,
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0.044921875,
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0.00970458984375,
-0.012939453125,
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0.0252685546875,
... | 34,558 | 34558 | |
Base Basics (Con't): Binary
Step 2: Base Basics (Con't): Binary
Binary (base-2)
As the name implies, a binary numbering system consists of two numbers: 1 and 0. Accordingly, this is referred to as base-2 and numbers look like 10010010
[2]
. In such a system, the representation of values are accomplished through a "... | 4 | [
0.050048828125,
0.01165771484375,
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0.10595703125,
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0.048095703125,
-0.024169921875,
-0.056884765625,
0.00006151199340820312,
-0.064941406... | 34,559 | 34559 | |
How to deduce ds/dx+ds/dy=0 from s_x(x)=0
November 26th 2011, 01:38 PM #1
Newbie
Joined
Nov 2011
Posts
3
Hello everyone,
I am stuck with the following problem and would really appreciate your help/hints/solutions:
Given that $s$ is smooth and that $y$ is near $x$, I want to obtain
$\frac{\p... | 4 | [
-0.04638671875,
-0.0196533203125,
0.0732421875,
-0.0294189453125,
0.0751953125,
0.0196533203125,
0.02685546875,
0.0400390625,
-0.0361328125,
0.04443359375,
0.10546875,
-0.0634765625,
0.00811767578125,
0.049560546875,
0.02392578125,
0.06005859375,
-0.03466796875,
0.0029449462890625,... | 34,560 | 34560 | |
Writing Algebraic Expression as a Single Fraction
September 28th 2010, 07:50 AM #1
Junior Member
Joined
Sep 2010
Posts
68
Writing Algebraic Expression as a Single Fraction
Need Help writing the following expression as a single fraction:
$\displaystyle \frac {10}{2x^2-3x-2}-\frac {2}{x-2}$
I've ... | 4 | [
-0.038330078125,
0.01495361328125,
0.040283203125,
0.003692626953125,
0.01202392578125,
0.050537109375,
-0.06640625,
-0.008544921875,
-0.0380859375,
0.015625,
0.04638671875,
-0.0986328125,
0.01263427734375,
0.02392578125,
-0.008544921875,
0.08349609375,
-0.00701904296875,
0.0556640... | 34,561 | 34561 | |
Maximal Ideal, Prime Ideal
September 28th 2008, 10:56 AM
roporte
Maximal Ideal, Prime Ideal
Let K a field, prove:
i) $\langle X,Y\rangle$ is a maximal ideal in $K[X,Y]$
ii) $\langle Y\rangle$ is a prime ideal in $K[X,Y]$ that not is maximal
Thanks!!!
September 28th 2008, 02:39 PM
ThePerfectHacke... | 5 | [
0.01611328125,
0.05419921875,
0.03271484375,
-0.0751953125,
-0.033203125,
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-0.045654296875,
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0.07177734375,
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-0.049072265625,
0.044189453125,
0.06640625,
0.0693359375,
-0.019287109375,
-0.... | 34,562 | 34562 | |
Family of Enriques surfaces and Grothendieck-Riemann-Roch
up vote 6 down vote favorite
7
Currently I'm studying the article Moduli of Enriques surfaces and Grothendieck-Riemann-Roch by Pappas.
I am particularly interested in how he applies the GRR.
Q1. What is meant by a "family of Enriques surfaces"? I was guessing... | 4 | [
-0.02392578125,
0.0203857421875,
0.01953125,
0.00860595703125,
0.1640625,
-0.0198974609375,
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0.1005859375,
0.023193359375,
-0.08203125,
0.08203125,
-0.0301513671875,
-0.041259765625,
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0.03662109375,
-0.0167236328125,
-0.11767578125,
-0.038330078125,
... | 34,563 | 34563 | |
how fast is the skier going, using kinetic friction and length.
November 1st 2007, 01:08 PM #1
Senior Member
Joined
Jan 2007
Posts
477
how fast is the skier going, using kinetic friction and length.
A skier slides horizontally along the snow for a distance of 27 m before coming to rest. The coefficient o... | 4 | [
0.049072265625,
0.01226806640625,
0.044677734375,
-0.0218505859375,
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0.04248046875,
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0.06494140625,
0.01226806640625,
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0.0751953125,
-0.03564453125,
0.06884765625,
-0.0308837890625,
0.091796875,
... | 34,564 | 34564 | |
Homework Help
Posted by Anonymous on Thursday, October 21, 2010 at 8:52pm.
a populatioin of bacteria has an initial size of 500. the population doubles every 7 hours.
a) how many bacteria will there be after 10 hours
b) when will there be 3000 bacter?
I keep getting answers that just don't make sense. Can someone d... | 4 | [
-0.05126953125,
-0.018310546875,
-0.00933837890625,
0.036376953125,
-0.0400390625,
-0.04833984375,
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0.10205078125,
0.01226806640625,
0.041748046875,
0.0272216796875,
-0.076171875,
0.0322265625,
0.11767578125,
-0.016357421875,
0.0311279296875,
-0.08203125,
-0.0825... | 34,565 | 34565 | |
coordinate geomoetry
Posted by Paige on Wednesday, July 12, 2006 at 12:54pm.
PLEASE SEND ME THE ANSWERS TO MY EMAIL ADDRESS
Find the midpoint of PQ if P(-7, 11) and Q(1, -4).
Find the area of the rectangle with vertices B(8, 0), T(2, -9), R(-1, -7) and C(5, 2).
Find the area of a triangle with vertices (0, 0), E(3,... | 4 | [
-0.0203857421875,
0.078125,
-0.002410888671875,
-0.10498046875,
0.022216796875,
0.03466796875,
0.0101318359375,
0.1357421875,
-0.0693359375,
-0.00811767578125,
-0.01123046875,
-0.037841796875,
-0.003326416015625,
0.020263671875,
-0.057861328125,
0.033447265625,
-0.0279541015625,
-0... | 34,566 | 34566 | |
Homework Help
Posted by jeff on Tuesday, July 8, 2008 at 4:24pm.
At noon, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing north at 25 km/h. How fast is the distance between the ships changing at 4:00 pm.
Find the intervals of increase or decrease
find the local maxiumum and m... | 4 | [
0.039794921875,
0.03076171875,
0.03466796875,
-0.0240478515625,
-0.0242919921875,
-0.078125,
-0.044921875,
0.08837890625,
-0.08740234375,
0.0439453125,
-0.052001953125,
-0.06201171875,
0.038330078125,
0.03466796875,
-0.0252685546875,
0.0869140625,
0.041259765625,
-0.01275634765625,... | 34,567 | 34567 | |
Taylor Polynomials
February 8th 2010, 09:53 PM #1
Newbie
Joined
Apr 2009
Posts
20
Taylor Polynomials
hi all,
I fear this will be long, but i'll try to keep it short.
the main question I am having trouble with is:
Evalutate f(0), f'(0), f''(0), f'''(0) for the function
$f(x) = (1+x)^{1/3}... | 5 | [
-0.0025482177734375,
-0.11767578125,
-0.0267333984375,
0.020751953125,
-0.003997802734375,
-0.0098876953125,
0.012451171875,
-0.00002658367156982422,
0.00335693359375,
0.057861328125,
0.07373046875,
-0.11474609375,
-0.028564453125,
-0.0361328125,
-0.0284423828125,
-0.00909423828125,
... | 34,568 | 34568 | |
A^-1 and a proof help
September 24th 2009, 01:23 AM
sleepiiee
A^-1 and a proof help
Hello guys, I've been trying to solve this problem all night and was wondering if I could get some help.
1. Suppose A is nxn nonsingular. Prove Det(A^-1) = 1 / Det(A)
I was trying to use the formula A^-1 = 1 / det(A) * a... | 4 | [
-0.08447265625,
-0.05615234375,
0.04833984375,
-0.00811767578125,
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-0.1396484375,
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-0.049072265625,
-0.000812530517578125,
-0.00099945068359375,
0.07666015625,
-0.031494140625,
0.0615234375,
0.006500244140625,
-0.0186767578125,
0.0224609375,
0.019531... | 34,569 | 34569 | |
Inner product space with orthonormal subset
April 4th 2008, 05:17 AM #1
Super Member
Joined
Mar 2006
Posts
705
Thanks
2
Inner product space with orthonormal subset
Let V be an inner product space, let $S = \{ v_{1},v_{2},...,v_{n} \}$ be an orthonormal subset of V. Prove that for any $x \in V$, we ha... | 5 | [
-0.0032806396484375,
0.0263671875,
0.06982421875,
-0.0537109375,
0.06689453125,
0.038818359375,
0.0264892578125,
-0.0283203125,
-0.0162353515625,
-0.010986328125,
-0.04736328125,
0.072265625,
0.050048828125,
-0.0595703125,
-0.052490234375,
-0.01446533203125,
0.08154296875,
-0.00138... | 34,570 | 34570 | |
[SOLVED] Dihedral Group D8
July 19th 2008, 12:30 PM #1
Member
Joined
Jun 2007
Posts
131
[SOLVED] Dihedral Group D8
Me again, How do I find the conjugacy classes of the attached? If someone could provide the answer and show me how its done so i can follow it, that would be great
The number of element... | 5 | [
-0.048583984375,
0.09326171875,
0.00701904296875,
-0.004119873046875,
-0.03271484375,
0.03564453125,
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0.1162109375,
-0.05859375,
-0.005828857421875,
-0.0537109375,
0.0234375,
-0.031982421875,
-0.025634765625,
-0.0703125,
0.00701904296875,
-0.0224609375,
-0.037109375,
-... | 34,571 | 34571 | |
Finding crritical points of a piecewise function
June 11th 2009, 08:34 PM
jimmyp
Finding crritical points of a piecewise function
Given:
$f(x)=\left\{\begin{array}{cc}-x^3+1 ,&\mbox{ if }<br /> x\leq 0\\-x^2 +2x, & \mbox{ if } x>0\end{array}\right.$
Find the critical numbers and open intervals on which... | 4 | [
-0.037353515625,
-0.0274658203125,
0.01446533203125,
0.005706787109375,
0.0145263671875,
-0.0732421875,
-0.0250244140625,
0.07080078125,
0.01080322265625,
-0.04833984375,
0.07763671875,
-0.047119140625,
0.07177734375,
-0.01171875,
0.0135498046875,
-0.029541015625,
0.0223388671875,
... | 34,572 | 34572 | |
Integrate cos(x)cos(4x) dx
February 14th 2013, 07:13 PM #1
Integrate cos(x)cos(4x) dx
I'm trying to integrate:
$\int\cos(x)\cos(4x) dx$
Could some one tell me what I should be seeing about this to help me solve it. I thought I needed to change the $4x$ into $x$ and tried doing that using the double angl... | 5 | [
-0.0322265625,
0.01336669921875,
0.053955078125,
-0.021240234375,
-0.026123046875,
0.047119140625,
0.0084228515625,
0.000171661376953125,
0.00830078125,
0.00274658203125,
0.018798828125,
-0.060791015625,
0.02490234375,
0.034912109375,
0.0289306640625,
0.01025390625,
0.047119140625,
... | 34,573 | 34573 | |
Finding the derivative
Determine the derivative of the function $f(x)=\frac{1}{\sqrt{x}}$ using first principles.
I don't know what you mean by first principles. Think of f(x) as $x^{-\frac{1}{2}}$. Now use the power rule.
Its been awhile since I've done these.. but I think be first principles it means using the form... | 5 | [
0.057861328125,
-0.0283203125,
0.031982421875,
-0.000782012939453125,
-0.02197265625,
-0.072265625,
-0.06396484375,
0.00439453125,
0.006195068359375,
0.05615234375,
0.1162109375,
0.008544921875,
0.0166015625,
0.05712890625,
0.0037841796875,
0.056640625,
0.0025177001953125,
-0.03271... | 34,574 | 34574 | |
solving 'exponential' equation
April 6th 2007, 03:56 AM #1
Member
Joined
Nov 2005
From
Wethersfield, CT
Posts
92
solving 'exponential' equation
Hi:
Is there an algebraic means by which to solve this equation and others like it? I can estimate via Newton's method but I would like to know how to ... | 5 | [
-0.06591796875,
-0.0123291015625,
0.0546875,
0.08544921875,
0.00138092041015625,
-0.07470703125,
-0.0079345703125,
-0.01361083984375,
-0.06689453125,
0.037109375,
0.072265625,
-0.15625,
-0.0091552734375,
0.0201416015625,
0.01263427734375,
-0.0284423828125,
-0.053466796875,
-0.03540... | 34,575 | 34575 | |
Tree-Based Backtracking Orthogonal Matching Pursuit for Sparse Signal Reconstruction
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 864132, 8 pages
http://dx.doi.org/10.1155/2013/864132
Research Article
Tree-Based Backtracking Orthogonal Matching Pursuit for Sparse Signal Reconstruction
^1School of Co... | 4 | [
-0.103515625,
0.027587890625,
0.00168609619140625,
-0.037353515625,
-0.0040283203125,
-0.033935546875,
0.004669189453125,
-0.05615234375,
-0.01007080078125,
-0.0322265625,
-0.01043701171875,
0.06005859375,
0.08251953125,
-0.04638671875,
-0.010498046875,
-0.037353515625,
-0.0187988281... | 34,576 | 34576 | |
solution set
July 30th 2012, 10:22 AM
rcs
solution set
can anyone tell me what solution i could use to find the solution set of:
1.) |7x| = 4 - x
2. (x^2 - 8x + 15) ( x^2 + 6x) <= 0
thank you
July 30th 2012, 10:25 AM
richard1234
Re: solution set
1. If $x \ge 0$, then $|7x| = 7x$ and $7x =... | 4 | [
-0.0732421875,
0.0390625,
0.0177001953125,
0.027587890625,
0.058349609375,
0.041259765625,
0.00136566162109375,
0.09765625,
-0.020751953125,
0.01507568359375,
0.04052734375,
-0.033203125,
0.11669921875,
0.058349609375,
0.0177001953125,
0.005126953125,
0.03857421875,
-0.0791015625,
... | 34,577 | 34577 | |
Drizzling and Chunking in IDL
QUESTION: Alright, you're so smart. I have one for you. What do you know about drizzling algorithms in IDL? (In case you don't know, these algorithms are used in the linear reconstruction of images
from u... | 5 | [
-0.1669921875,
0.01025390625,
0.0673828125,
0.0537109375,
0.03466796875,
-0.1259765625,
0.030029296875,
-0.020751953125,
-0.058349609375,
-0.0498046875,
-0.1455078125,
0.06005859375,
0.0308837890625,
-0.027099609375,
-0.046630859375,
0.025146484375,
-0.042724609375,
0.0257568359375... | 34,578 | 34578 | |
Mole Ratio Lab
Purpose
The purpose of this lab is to show how by using continuous variation, one can find the mole ratio of reactants in a reaction.
Data Tables:
Solution Temperature Change in Temperature from Average Temperature of Solution B and NaClO
50 mL Solution B 21°C --------------------
0 mL NaClO
45 m... | 4 | [
-0.0277099609375,
-0.0198974609375,
-0.052734375,
0.029296875,
0.0634765625,
-0.021728515625,
-0.00341796875,
0.040283203125,
-0.017333984375,
-0.01025390625,
-0.0281982421875,
-0.10595703125,
0.1044921875,
0.0693359375,
0.0172119140625,
0.0341796875,
-0.040771484375,
-0.0186767578... | 34,579 | 34579 | |
Linear transformation of the line
October 7th 2011, 06:52 AM #1
Newbie
Joined
Oct 2011
Posts
1
Linear transformation of the line
So I have this question:
Find linear transformations of R2 which satisfy the following conditions: Sends the line y = 4x to the origina, but isn't the zero map.
I kno... | 4 | [
0.01531982421875,
0.036376953125,
-0.09326171875,
-0.0478515625,
-0.0673828125,
-0.009765625,
-0.0125732421875,
0.005767822265625,
0.033935546875,
0.00665283203125,
0.0654296875,
0.0242919921875,
-0.064453125,
0.009765625,
-0.032470703125,
0.09130859375,
-0.06982421875,
-0.04785156... | 34,580 | 34580 | |
exponential family help
March 24th 2010, 12:21 PM #1
exponential family help
Q: Let $Y_{1},...,Y_{n}$ denote a random sample from the probability density function
$f(y|\theta)=\theta\\y^{\theta\\-1}$ for $0<y<1$, $\theta>0$ and 0 otherwise.
a) Show that this density function is in the (one-parameter) expo... | 4 | [
-0.125,
-0.049560546875,
0.035400390625,
-0.041259765625,
0.07080078125,
-0.0220947265625,
0.09619140625,
-0.058349609375,
0.0245361328125,
-0.0147705078125,
0.07470703125,
-0.008056640625,
0.01275634765625,
-0.019775390625,
-0.0224609375,
0.047607421875,
-0.0208740234375,
-0.10644... | 34,581 | 34581 | |
Finding the exact value of sin 3
November 13th 2008, 04:27 PM
username11111
Finding the exact value of sin 3
Question says if...
$cos 72 = \frac{\sqrt5 - 1}{4}$
then find the exact value of sin 3
How would one go about doing this?
November 13th 2008, 04:45 PM
mr fantastic
November 13th 2008, 04:... | 5 | [
-0.029052734375,
0.1064453125,
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0.01092529296875,
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Nearest and farthest point
November 18th 2009, 05:22 AM #1
Member
Joined
Oct 2008
Posts
206
Nearest and farthest point
The plane $x+y+2z=2$ intersects the paraboloid $z=x^2+y^2$ in an ellipse. Find the points on this ellipse that are nearest to and farthest from the origin.
What I did:
Let $f(x... | 5 | [
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-0.148... | 34,583 | 34583 | |
Quadratic function word problems
November 30th 2010, 03:11 PM #1
Junior Member
Joined
Sep 2008
Posts
71
Quadratic function word problems
Hey guys I need can someone me help get started on these two word problems.
An archway over a road is modeled by the quadratic function y < -.1x^2+12.
Can a ca... | 4 | [
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... | 34,584 | 34584 | |
peano arithmetic
July 24th 2006, 08:52 PM #1
Member
Joined
Mar 2006
Posts
82
PLease help me..i am losing all my hairss....
O is a natural number
For every natural number n, its sucessor Sn is a natural number.
For every natural number n, Sn is not equal to 0;
For every natural number n, for e... | 5 | [
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College Finite Math
Posted by Taymor on Thursday, April 9, 2009 at 11:41pm.
Involving a true-false test. Assume that 8 questions are answered by guessing.
What is the probability of at least 6 correct answers?
I know this a Burnoulli Trial problem and that N=8 and p=.5 and q=.5
I just don't know where to go from th... | 5 | [
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Calculus Trig Integration/substitution, by parts, improper integrals?
March 22nd 2013, 10:37 AM
goku900
Calculus Trig Integration/substitution, by parts, improper integrals?
) lower bound 2 upper bound 4 ∫ sqrt(9x^2-25)/ x^3 dx
2) lower bound 0 upper bound pi/4 ∫ sec^4xtan^4x dx
3) 0 to pi ∫ e^(cosx)si... | 5 | [
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... | 34,587 | 34587 | |
Thermodynamics
Posted by Janus on Saturday, March 6, 2010 at 11:53am.
5 pounds of an ideal gas with R=38.7 and K=1.668 have 300Btu of heat added during a reversible constant pressure change of state, initial temperature=80°F.
Determine:
a.)the final temperature
b.)change of internal energy
change of enthalpy
chan... | 4 | [
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... | 34,588 | 34588 | |
Recurrence relation
January 30th 2009, 07:45 PM #1
Newbie
Joined
Oct 2008
From
@home
Posts
17
Recurrence relation
Hello,
I am trying to understand how to solve this kind of problems but I am stuck in this.
It is given this recurrence relation:
$T(n) = 3T(n - 1) - 2T(n - 2), T(1)=1, T(2)=... | 5 | [
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Catmull-Clark Subdivision: The Basics
For a little under a year now, I’ve been using Modo to learn how to create 3D models. I’m doing this partly for fun, and partly to help me think about game engine features from the perspective of an
artist. Along with the traditional poly-modeling tools, Modo (like many other 3D to... | 4 | [
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0.... | 34,590 | 34590 | |
librarian
May 17th 2006, 07:33 AM
swoopesjr01
librarian
A librarian has estimated that 5% of the books that people sign out are resturned damaged in some way, while 1% of the books are never returned at all.
a) if 4 people each sign out one book and all are returned, what is the probability that exactly 2 o... | 5 | [
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[SOLVED] Decisions and Forcasting
February 27th 2008, 01:47 PM #1
EcceHomo
Guest
[SOLVED] Decisions and Forcasting
Hi everybody,
I am doing the quantitative methods project. It is mainly concerned with the forecasts and decisions. The only data that i have got were sales for 20 different time periods. I have... | 4 | [
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Homework Help
Posted by arielle on Tuesday, November 28, 2006 at 8:04pm.
gravational force
deimos, a satellite of amrs, has an average radius of 6.3 km. If the gravational force between deimos and a 3.0 kg rock at its surface is 2.5x10(-2)N..what is the mass of deimos ?
Use the Universal Law of gravitation:
Force= ... | 4 | [
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Solving an integral equation
June 12th 2011, 06:03 PM #1
Newbie
Joined
Jun 2011
Posts
2
Solving an integral equation
Hello everyone,
I am trying to solve a seemingly simple integral equation:
$g(z)=\int_{z-1}^{\infty}\frac{g(t)}{t}dt$
where $g(z)$ is known to be zero for $z\le 1$.
$g(z)... | 4 | [
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-0.07... | 34,594 | 34594 | |
linear systems of equations/ matrices
December 11th 2008, 08:02 PM #1
Newbie
Joined
Dec 2008
Posts
3
linear systems of equations/ matrices
solve this system for x,y, and z
x + 3y + z = -2
2x + 5y + 3z = -7
x + 4y - 3z = 4
if you could help me step by step a little bit that would be much... | 4 | [
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... | 34,595 | 34595 | |
Contest Explanation For Algebra Game
Games Three and Four: Algebra
Makes algebra fun!
Rules For Game Three: Algebra
You are given a formula... | 4 | [
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... | 34,596 | 34596 | |
complex number equation
February 11th 2010, 04:02 PM #1
complex number equation
Hi,
I would like some help with this.
The equation $p(z)=z^4-2z^3+4z^2-2z+3$ is given.
Show that one of the roots are i.
So i verified that i is indeed a root. And since complex roots are "mirrored", another root ... | 4 | [
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0... | 34,597 | 34597 | |
Finding the Two-Thirds Root of a Number Using Loops
July 8th, 2012, 03:30 PM #1
Junior Member
Join Date
Jun 2012
Posts
10
Thanks
0
Thanked 0 Times in 0 Posts
Hello everyone!
I am trying to create a program that can display the two thirds root of a number that I provide.
I have yet to fin... | 4 | [
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0.... | 34,598 | 34598 | |
Multivariate normal distribution and marginal distribution
October 2nd 2013, 03:57 PM
sunmalus
Multivariate normal distribution and marginal distribution
Hi everyone,
I have the following exercise:
Given $Y \sim \mathcal{N}_p(\mu,\Omega )$,
a) Consider the following decomposition $Y=(Y_1,Y_2)^T, \mu... | 4 | [
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