content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Partial Fraction Decomposition
July 10th 2010, 09:10 AM #1
Newbie
Joined
Jun 2010
Posts
16
Partial Fraction Decomposition
$(8x+12)/x(x+4) =A/x+B/(x+4)$
Looking for some help.
This is how I'm approaching it so far and not sure I'm doing it correctly.
$8x+12=A(x+4)+B(x)$
$8x+12=(A+B)x+(... | 4 | [
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Coverage Optimization Algorithm Based on Sampling for 3D Underwater Sensor Networks
International Journal of Distributed Sensor Networks
Volume 2013 (2013), Article ID 478470, 12 pages
http://dx.doi.org/10.1155/2013/478470
Research Article
Coverage Optimization Algorithm Based on Sampling for 3D Underwater Sensor Net... | 4 | [
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-0.0100097656... | 28,001 | 28001 | |
Intersection of Circle and Line
May 11th 2007, 04:12 AM #1
Intersection of Circle and Line
tigerdivision
A yacht sails in a straight line; its position at time t is (-t+600, 2t-300). A man stands on an island at position (200,100). Due to mist he can see objects within a circle of radius 200 m
centred at... | 4 | [
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implicit Partial differentiation
January 3rd 2012, 04:19 PM #1
Newbie
Joined
Jan 2012
Posts
2
implicit Partial differentiation
Hi,
I have a problem that has to do with implicit partial differentiation. I was wondering how I could solve it using Jacobian determinants, if not possible, then a straight ... | 4 | [
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Simple and heuristic optimization
June 29, 2012
By arthur charpentier
This week, at the Rmetrics conference, there has been an interesting discussion about heuristic optimization. The starting point was simple: in complex optimization problems (here we mean with a lot
of local maxima, for instance), we do not necess... | 4 | [
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Fuzzy Approach for Group Sequential Test
Advances in Fuzzy Systems
Volume 2014 (2014), Article ID 896150, 9 pages
http://dx.doi.org/10.1155/2014/896150
Research Article
Fuzzy Approach for Group Sequential Test
Department of Statistics, Hacettepe University, 06800 Ankara, Turkey
Received 10 November 2013; Revised 26... | 5 | [
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... | 28,005 | 28005 | |
Fixed Points of Multivalued Contractive Mappings in Partial Metric Spaces
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 230708, 9 pages
http://dx.doi.org/10.1155/2014/230708
Research Article
Fixed Points of Multivalued Contractive Mappings in Partial Metric Spaces
^1Department of Mathematics and Stati... | 5 | [
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... | 28,006 | 28006 | |
Why can't I be a perfect square?
February 16th 2010, 09:14 PM #1
Newbie
Joined
Feb 2010
Posts
8
Why can't I be a perfect square?
why can't 5+3n ever be a perfect square? (n is an integer)
alternatively.
why isn't x^2-5 divisible by three? (x is an integer)
Hello,
why can't 5+3n ever be... | 4 | [
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Bayesian model selection
Tom Minka
The probability of the data given the model is computed by integrating over the unknown parameter values in that model:
which reduces to a problem of calculus. This quantity is called the evidence for model M. Specific examples of computing the evidence follow.
A useful property o... | 4 | [
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... | 28,008 | 28008 | |
The Fast Fourier Transform • /r/math
all 20 comments
[–]sakattackErgodic Theory25 points26 points27 points
sorry, this has been archived and can no longer be voted on
[–]FenringMathematical Physics3 points4 points5 points
sorry, this has been archived and can no longer be voted on
[–]ButterMyBiscuit6 points7 point... | 4 | [
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Anti-Derivatives
April 14th 2007, 07:14 PM #1
Junior Member
Joined
Mar 2007
Posts
56
Anti-Derivatives
I need help finding the anti-derivative of this function:
f(x) = the cubed root of x + 5/x^6
When I try to do the problem it comes out wrong:
f(x) = x^1/3 + 5(x^-6)
f(x) = x^(1 + 1/3)/... | 4 | [
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An example of a very strange sequence
August 11th 2011, 07:08 AM
Thommas
An example of a very strange sequence
Hallo everyone!
I hope, you can help me with the following problem:
Given the sequence (sin(n) )^n
Does is converge?
I already know, that the sequence sin(n)
(without the exponen... | 5 | [
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Low-Speed Control of Heavy-Load Transfer Robot with Long Telescopic Boom Based on Stribeck Friction Model
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 432129, 12 pages
http://dx.doi.org/10.1155/2012/432129
Research Article
Low-Speed Control of Heavy-Load Transfer Robot with Long Telescopic Boom... | 4 | [
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Video Genre Classification Using Weighted Kernel Logistic Regression
Advances in Multimedia
Volume 2013 (2013), Article ID 653687, 6 pages
http://dx.doi.org/10.1155/2013/653687
Research Article
Video Genre Classification Using Weighted Kernel Logistic Regression
^1Hunan University, Changsha 410082, China
^2Universit... | 4 | [
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What are the coordinates of A
December 8th 2012, 08:43 PM #1
What are the coordinates of A
A trapezoid ABCD has an area of 24 sq. units. There of its coordinates are
B(1,8) , C(2,3), and D(-6,3) . Find the coordinates of A.
can anybody help me on this problem above please.
Re: What are the coordinates o... | 4 | [
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... | 28,014 | 28014 | |
Novel Global Exponential Stability Criterion for Recurrent Neural Networks with Time-Varying Delay
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 540951, 7 pages
http://dx.doi.org/10.1155/2013/540951
Research Article
Novel Global Exponential Stability Criterion for Recurrent Neural Networks with Time-Va... | 5 | [
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Joint Optimal Pricing and Inventory Control for Deteriorating Items under Inflation and Customer Returns
Journal of Industrial Engineering
Volume 2013 (2013), Article ID 709083, 7 pages
http://dx.doi.org/10.1155/2013/709083
Research Article
Joint Optimal Pricing and Inventory Control for Deteriorating Items under Inf... | 5 | [
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Using R for Introductory Statistics, Chapter 5
Any good stats book has to cover a bit of basic probability. That's the purpose of Chapter 5 of Using R for Introductory Statistics, starting with a few definitions:
Random variable
A random number drawn from a population. A random variable is a variable for which ... | 5 | [
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A Geometry Exercise
This post was inspired by a problem I came across when studying for a math contest, namely problem 23 in the 2007 Cayley Contest.
I think this is an interesting problem because the solution is not so obvious, and there are several incorrect approaches that I’ve tried (and given up on). I’ve modifi... | 5 | [
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Stability Analysis of a Model for Foreign Body Fibrotic Reactions
Computational and Mathematical Methods in Medicine
Volume 2012 (2012), Article ID 809864, 11 pages
http://dx.doi.org/10.1155/2012/809864
Research Article
Stability Analysis of a Model for Foreign Body Fibrotic Reactions
^1Department of Mathematics and... | 4 | [
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Limit proof
July 18th 2011, 05:40 AM #1
Limit proof
Hi, I've to proof that:
$\lim_{ x \to 0} \int_{x}^{\frac{\pi}{2}} \frac{1-\cos(u)}{\sin^2(u)}du=1$
This is what I found:
$\lim_{ x \to 0} \int_{x}^{\frac{\pi}{2}} \frac{1-\cos(u)}{\sin^2(u)}du=\lim_{x \to 0} \left(\int_{x}^{\frac{\pi}{2}} \frac{du... | 5 | [
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N
January 6, 2006
This on-line tutorial is intended for everyone with an interest in centrifugal pumps. There is no math, just good, clear explanations of how it works. It follows the same approach as the pump
tutorial and if you are just starting in this field I recommend you read it first.
Here is the pdf ve... | 5 | [
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-Laplacian Equation with Multiple Constant Delays
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 760918, 8 pages
http://dx.doi.org/10.1155/2012/760918
Research Article
Periodic Solutions for Duffing Type -Laplacian Equation with Multiple Constant Delays
^1College of Mathematics and Computer Science, Hu... | 5 | [
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Existence of Solutions in Some Interpolation Spaces for a Class of Semilinear Evolution Equations with Nonlocal Initial Conditions
Journal of Function Spaces and Applications
Volume 2013 (2013), Article ID 451252, 11 pages
http://dx.doi.org/10.1155/2013/451252
Research Article
Existence of Solutions in Some Interpola... | 5 | [
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Eulers theorem
April 10th 2006, 03:51 PM #1
Junior Member
Joined
Apr 2006
Posts
39
Eulers theorem
Can some1 please help me with this
made another mistake its
please help me solve the following without using a calculator
9^7 mod 143 oops!!
thanks
Last edited by darren_a1; April 10th... | 5 | [
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Function and Geometry [Eleventh Grade]
February 28th 2008, 11:32 AM #1
bekridu19
Guest
Function and Geometry [Eleventh Grade]
The function defined on R by f(x)= (2/3)x+2
And cf his graphic representation in an orthonormal mark (o; i; j)
On the X axis, we consider points A, B and H of respective abscissa... | 4 | [
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b +/- x^2 = 0 (mod n) n-1/2 is odd
August 18th 2009, 10:18 AM #1
Newbie
Joined
Jun 2009
Posts
5
b +/- x^2 = 0 (mod n) n-1/2 is odd
For any integer b and odd prime n where b mod n is non-zero
b (mod n) is a member of the set {1,...,(n-1)}
b^2 (mod n) is also a member of the set {1, ...,(n-1)}
... | 4 | [
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A Quasi-ARX Model for Multivariable Decoupling Control of Nonlinear MIMO System
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 570498, 13 pages
http://dx.doi.org/10.1155/2012/570498
Research Article
A Quasi-ARX Model for Multivariable Decoupling Control of Nonlinear MIMO System
Graduate School o... | 4 | [
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-0.09765625,
0.048583984375,
-0.0218505859375,
0.059326171875,
... | 28,027 | 28027 | |
Tractable Approximation to Robust Nonlinear Production Frontier Problem
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 965835, 13 pages
http://dx.doi.org/10.1155/2012/965835
Research Article
Tractable Approximation to Robust Nonlinear Production Frontier Problem
^1Department of Economic Mathematics, So... | 4 | [
-0.0751953125,
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0.001708984375,
0.0400390625,
-0.048339843... | 28,028 | 28028 | |
Integrating fractions, help
June 12th 2010, 11:58 AM #1
Super Member
Joined
Sep 2008
Posts
607
Integrating fractions, help
$\int \frac{2x}{3-x} dx$
I have tired two methods, which both give me wrong answers, here my working , if anyone could tell me where I am going wrong, it would be greatly apprec... | 5 | [
-0.04736328125,
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0.01226806640625,
... | 28,029 | 28029 | |
Solving Equations by factoring
I believe that the you can not factor 4z(z^2 - z + 6) any further... Also you are missing a negative sign before 4z
There is no reason to believe there was an "= 0" to be omitted! The difficulty is that asilvester635 has not told us what the problem is or what he is trying to do.
I did ... | 4 | [
-0.0054931640625,
0.057373046875,
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0.0... | 28,030 | 28030 | |
cos32 + cos58 + cos20 + cos70
February 19th 2006, 08:13 PM #1
Newbie
Joined
Feb 2006
Posts
2
cos32 + cos58 + cos20 + cos70
I ran into this problem on a worksheet:
Simplify and Evaluate: (without using a calculator)
cos32 + cos58 + cos20 + cos70
I have tried using difference of sine and dif... | 4 | [
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0.080078125,
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0.038330078125,
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0.03930... | 28,031 | 28031 | |
Calc. Word Problems
heya, I absolutely horrible with Calculus Word Problems and was wonder if anyone could help me with these.
#148 We are told that $\frac{\,dV}{\,dt}$ is inversely proportional to the square of $t+1$ This tells us that $\frac{\,dV}{\,dt}=\frac{k}{(t+1)^2}$, where $k$ is a constant of proportionality.... | 5 | [
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0.0859375,
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-0.115234375,
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0.0255126953125,
-0.0810... | 28,032 | 28032 | |
The Principle of Stationary Action in Biophysics: Stability in Protein Folding
Journal of Biophysics
Volume 2013 (2013), Article ID 697529, 7 pages
http://dx.doi.org/10.1155/2013/697529
Research Article
The Principle of Stationary Action in Biophysics: Stability in Protein Folding
^1Department of Physics and Astrono... | 4 | [
-0.10791015625,
-0.158203125,
0.0093994140625,
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0.07373046875,
0.0625,
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0.064453125,
-0.09765625,
0.03369140625,
-0.0556640625... | 28,033 | 28033 | |
Perturbation-Iteration Method for First-Order Differential Equations and Systems
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 704137, 6 pages
http://dx.doi.org/10.1155/2013/704137
Research Article
Perturbation-Iteration Method for First-Order Differential Equations and Systems
^1Department of Mathema... | 5 | [
-0.10791015625,
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0.0478515625,
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... | 28,034 | 28034 | |
Finding range of complex quadratic
May 19th 2013, 05:33 AM #1
Newbie
Joined
Apr 2013
From
Sydney
Posts
17
Thanks
2
Finding range of complex quadratic
Hi there,
I need to find the range algebraically of the following equation:
(x^2-6x+5)/(x^2+2x+1)
I know the answer is everything gr... | 4 | [
-0.087890625,
-0.026611328125,
0.031005859375,
0.03955078125,
-0.004638671875,
0.0380859375,
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0.038330078125,
0.01806640625,
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0.054443359375,
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0.03515625,
0.0927734375,
0.026611328125,
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0.0380859375,
-0.0140380859375,
... | 28,035 | 28035 | |
Virginia state standards of Learning Algebra problem
January 5th 2011, 03:17 PM #1
Virginia state standards of Learning Algebra problem
$f(x)=x^2-x-6$
$f(x)=0$
$x^2-x=6\Rightarrow\ x(x-1)=6$
The factors of 6 that differ by 1 are ?
There is a positive and negative solution.
Do you know how ... | 4 | [
-0.0198974609375,
-0.03271484375,
-0.06005859375,
0.046142578125,
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0.08935546875,
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-0.0125732421875,
-0.02197265625,
-0.018310546875,
0.0303955078125,
-0.056396484... | 28,036 | 28036 | |
Toeplitz Operators with Essentially Radial Symbols
International Journal of Mathematics and Mathematical Sciences
Volume 2012 (2012), Article ID 492690, 14 pages
http://dx.doi.org/10.1155/2012/492690
Research Article
Toeplitz Operators with Essentially Radial Symbols
^1Division of Mathematics, Faculty of Statistical... | 4 | [
-0.003936767578125,
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-0.0... | 28,037 | 28037 | |
Polar graph integration
May 12th 2013, 07:24 AM #1
Newbie
Joined
Apr 2013
From
United States
Posts
6
Polar graph integration
Question: What is the area bounded by one petal of the graph r = (1 - Cos(3theta))?
From plotting this in the polar and Cartesian plane I gathered that one petal occurs o... | 5 | [
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Finding absolute extrema of function on closed interval
June 9th 2009, 07:39 PM #1
Junior Member
Joined
May 2009
Posts
25
Finding absolute extrema of function on closed interval
Given:
$g(x) = 4(1+\frac{1}{x}+\frac{1}{x^2}), [-4,5]$
[-4,5] being the interval how can I find the absolute extrema ... | 4 | [
0.06591796875,
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0.078125,
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0.0201416015625,
0.12158203125,
-0.0644... | 28,039 | 28039 | |
Scale problem
June 3rd 2007, 05:52 AM #1
Scale problem
When you cut a piece of A4 paper in half (portraiot way up, cut across) youget two pieces of A5 paper.
Ignoring its thickness, A5 paper is similar to A4 paper.
Express the length of A5 paper as a percentage of the length of A4 paper.
OK, I ge... | 4 | [
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0... | 28,040 | 28040 | |
Quadratic equation by factorisation (without using the standard formula)?
March 31st 2010, 01:18 AM
Jay1001
Quadratic equation by factorisation (without using the standard formula)?
X2 -4x -165 = 0
must show that you have checked your answer by substituting the values obtained into the original expression
... | 4 | [
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Superresolution of Images Using Area Preserving Geometric Evolution Laws
ISRN Computer Graphics
Volume 2012 (2012), Article ID 846980, 5 pages
http://dx.doi.org/10.5402/2012/846980
Research Article
Superresolution of Images Using Area Preserving Geometric Evolution Laws
Department of Mathematics, Dresden University ... | 4 | [
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0.0228271... | 28,042 | 28042 | |
The Dual and Mirror Images of the Dunwoody 3-Manifolds
International Journal of Mathematics and Mathematical Sciences
Volume 2013 (2013), Article ID 103209, 7 pages
http://dx.doi.org/10.1155/2013/103209
Research Article
The Dual and Mirror Images of the Dunwoody 3-Manifolds
Department of Mathematics, Dong-eui Univer... | 4 | [
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... | 28,043 | 28043 | |
Need help for Proving Quadratic Equations
August 27th 2009, 10:51 PM
saberteeth
Need help for Proving Quadratic Equations
Hello people, (Happy)
How do i prove these?
1) If a, b and c are real, show that the roots of the following equations are real:
(i) (b+c)x^2 - (a + b + c)x + a = 0
(ii) (a ... | 4 | [
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0.02294921875,
-0.047119140625,
-0.0192871... | 28,044 | 28044 | |
Linear first order ODE question
December 29th 2010, 06:34 PM
Glitch
Linear first order ODE question
The question:
$x^2 \frac{dy}{dx} -xy = y$
I'm not sure where to start. I tried getting it in a form where I can calculate the integrating factor, but nothing I do seems to work. Any suggestions?
Decembe... | 4 | [
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-0.06689453125,
-0.0172119140625,
... | 28,045 | 28045 | |
Probability/Combinations - Question
November 27th 2008, 08:04 AM
cnmath16
Probability/Combinations - Question
A club consists of 25 married couples. Determine how many ways a committee of 7 people can be formed from these couples if..
c) at least one person must be a man
no answer for this question. C... | 4 | [
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-0.032958984375,... | 28,046 | 28046 | |
Spontaneous Emission of an Excited Atom in a Dusty Unmagnetized Plasma Medium
Advances in Materials Science and Engineering
Volume 2014 (2014), Article ID 746742, 4 pages
http://dx.doi.org/10.1155/2014/746742
Research Article
Spontaneous Emission of an Excited Atom in a Dusty Unmagnetized Plasma Medium
Plasma Physic... | 4 | [
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0.0371... | 28,047 | 28047 | |
functionfinding
June 28th 2012, 07:00 AM #1
Newbie
Joined
Jun 2012
From
Croatia
Posts
15
functionfinding
How to find function that have values:
f(0)=0, f(1)=0, f(2)=0, f(3)=0,... for period T=1
f(0)=0, f(1)=1, f(2)=0, f(3)=1,... for period T=2
f(0)=0, f(1)=1, f(2)=1, f(3)=0, f(4)=1, f(5)=... | 5 | [
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0.041259765625,
-0.017822265625,
-0.026611328125,
-0.158203125,
-0.025634765625,
... | 28,048 | 28048 | |
Homework Help
Posted by val on Tuesday, December 1, 2009 at 7:29pm.
A spherical water tank has a diameter of 10 feet. How much water does it hold when half full (use 3.14 for , and round to the nearest hundredth)?
• geometry - val, Tuesday, December 1, 2009 at 7:32pm
how will i get my answer
• geometry - No... | 4 | [
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0.1279296875,
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-0.055419921875,
-0.037841796875,
0... | 28,049 | 28049 | |
Physics Forums - Solve laplace's equation on semi infinite strip
nathangrand Feb14-12 01:40 PM
Solve laplace's equation on semi infinite strip
[itex]\nabla[/itex]^2(Z)=0
Z= 0 for x=0, y=0
Z= x(1-x) for y=0
Z=0 for y=infinity
Range 0<x<1 and y>0 (suppose strictly speaking should be x=1 and x=0 too)
So all I wa... | 5 | [
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0.00799560546875,
-0.03125,
-0.00811767578125,
-0.09716796875... | 28,050 | 28050 | |
Integration problem
April 21st 2008, 09:55 PM #1
Member
Joined
Sep 2007
Posts
198
Integration problem
The curve with equation $a^2 y^2 = x^2 (a^2 - x^2)$ has two loops.
Show, by integration, that the area enclosed by a loop is $\frac {2}{3} a^2$.
Please help me to do this.
solving the above... | 4 | [
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0.01116943359375,
0.0458984375,
-0.04541015625,
-... | 28,051 | 28051 | |
why does it work only when h tends to zero????
June 16th 2013, 11:50 PM
mpx86
why does it work only when h tends to zero????
$f(x + h) = xf(x)\\<br /> Ef(x) = xf(x)\\<br /> E = x\\<br /> \ln E = hD\\<br /> \ln x = hD\\<br /> f(x) = y\\<br /> y\ln x = hDy\\<br /> y\ln x = h\frac{{dy}}{{dx}}\\<br /> \int {} \ln xd... | 5 | [
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-0.1162109375,
0.01483... | 28,052 | 28052 | |
Starting Log and Ln Chapter 4 (Need Help)
April 18th 2006, 04:58 PM #1
Newbie
Joined
Mar 2006
Posts
10
Starting Log and Ln Chapter 4 (Need Help)
Hello,
In class I am breifing chapter 4 through 4.5 then we are jumping to 9 so I have to get 4 down quickly. In my homework are two questions I'm getting ... | 5 | [
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-0.0317382... | 28,053 | 28053 | |
Find remainder with congruence theorem
February 6th 2008, 01:09 PM #1
Super Member
Joined
Mar 2006
Posts
705
Thanks
2
Find remainder with congruence theorem
This is a problem we ran over in class, but I don't fully understand it.
Find remainder when $3^{1000000}$ is divided by 26.
Solution:... | 5 | [
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0.0021209716796875,
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0.0908203125,
0.034423828125,
0.06640625,
-0.040771484375,
-0.123046875,
0.031494140... | 28,054 | 28054 | |
New Type Continuities via Abel Convergence
The Scientific World Journal
Volume 2014 (2014), Article ID 398379, 6 pages
http://dx.doi.org/10.1155/2014/398379
Research Article
New Type Continuities via Abel Convergence
^1Department of Mathematics, Maltepe University, Marmara Eğıtım Köyü, Maltepe, 34857 İstanbul, Turke... | 5 | [
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0.00787353515625,
-0.0103759765625... | 28,055 | 28055 | |
finding the slope of a tangent line
September 16th 2012, 11:41 AM #1
Newbie
Joined
Sep 2012
From
United States
Posts
10
finding the slope of a tangent line
I have been stuck on this question for a while now. I need to find the slope of the tangent to the curve 5 over the square root of x (5/squareroo... | 4 | [
-0.08056640625,
-0.057373046875,
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0.072265625,
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0.1513671875,
-0.08935546875,
-0.0042114... | 28,056 | 28056 | |
A strange inequality
October 31st 2008, 05:48 PM #1
Newbie
Joined
Oct 2008
Posts
12
A strange inequality
I saw this one in an analysis text. The author didn't say where this inequality comes from or where it is used. I'd like to know more about it if anyone has information on it. Looks like some
kind... | 5 | [
0.0004444122314453125,
0.0556640625,
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0.059326171875,
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0.0400390625,
0.058837890625,
-0.0419921875,
-0.016357421875,
0.0888671875,
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0.099609375,
-0.005584716796875,
-0.031982421875,
0.050537109375,
-0.0145... | 28,057 | 28057 | |
Math Help
September 16th 2010, 07:20 PM #1
Junior Member
Joined
Sep 2009
Posts
32
Proof
Decide whether the following statement is true or false. If it is true, show that it is true, making your argument as general as possible. If it is false, disprove it by finding a counterexample.
For all integer... | 4 | [
-0.00396728515625,
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0.08642578125,
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-0.04052734375,
0.0146484375,
-0.0118408203125,
-0.041259765625,
0.06591796875,
0.10107421875,
0.04345703125,
-0.033203125,
-0.0140380859375,
0.... | 28,058 | 28058 | |
smallest element
September 30th 2012, 05:27 AM
Burcin
smallest element
Let u,v ∈ http://upload.wikimedia.org/math/3/f...cc2e7dd3cb.png \ {0} define A as A={a∈ N\{0} : u|a and v|a}
I want to prove two things
1) I want to show that A has a smallest element and call this b
2) Show that for every a∈ A f... | 5 | [
-0.006866455078125,
0.1044921875,
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-0.03515625,
0.017822265625,
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0.035400390625,
-0.0267333... | 28,059 | 28059 | |
the encyclopedic entry of complex variable
Complex analysis
, traditionally known as the
theory of functions of a complex variable
, is the branch of
mathematics
investigating
functions
of
complex numbers
. It is useful in many branches of mathematics, including
number theory
and
applied mathematics
, and ... | 4 | [
-0.0888671875,
0.057861328125,
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0.0... | 28,060 | 28060 | |
Coordinates of the midpoint of intersecting lines
August 21st 2010, 02:52 AM
Punch
Coordinates of the midpoint of intersecting lines
Find the coordinates of the mid-point of the straight line joining the points of intersection of the curve $x^2+2y^2+5x=68$ and the line $2y+3x=9$
August 21st 2010, 03:14 AM
Prov... | 4 | [
-0.0205078125,
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0.08837890625,
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-0.08935546875,
-0... | 28,061 | 28061 | |
Inventory Cost Problem
November 29th 2012, 06:09 PM
Shifletz
Inventory Cost Problem
I'm having issues finding the answer to anything relating to the $55 unit cost. Here is the full problem, including the answers that I've been able to find thus far:
Ergonomics Inc. sells ergonomically designed office chair... | 5 | [
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-0.0... | 28,062 | 28062 | |
Power series expansion proofs for the differential of sinx and cosx
February 17th 2011, 04:58 AM
maximus101
Power series expansion proofs for the differential of sinx and cosx
Let sin x and cos x be defined by their power series expansions
how can we use term by term differentiation to show that
$d/dx$... | 4 | [
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-0.0146484375,... | 28,063 | 28063 | |
Inequality :\
October 12th 2009, 01:04 PM #1
Junior Member
Joined
Dec 2008
From
London
Posts
45
Inequality :\
Stupid inequality i can't solve, we've been told to show a certain method when solving the question which i don't understand T_T
Question
$\frac{3}{3x-2}>\frac{1}{x+4}$
The meth... | 4 | [
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-0.0703125,
... | 28,064 | 28064 | |
Order statistics
February 9th 2010, 01:25 PM #1
Newbie
Joined
Feb 2010
Posts
2
Hey I am having difficulties with this problem, can anyone help please?
Let Y1, Y2,...,Yn be independent, uniformly distributed random variables on the interval [0, θ]. Find the joint density function of Y(j) and Y(k) whe... | 4 | [
-0.0306396484375,
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the encyclopedic entry of dihedral group
In mathematics, a dihedral group is the group of symmetries of a regular polygon, including both rotations and reflections. Dihedral groups are among the simplest examples of finite groups, and they
play an important role in group theory, geometry, and chemistry.
See also: Dihe... | 4 | [
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0... | 28,066 | 28066 | |
Integral help
Hello,This cannot be expressed in terms of simple functions. Integrate[E^(x^2 - x), x] == (Sqrt[Pi]*Erfi[-1/2 + x])/(2*E^(1/4)) http://reference.wolfram.com/mathematica/ref/Erfi.html
thanks. hmm. i probably did something wrong. here is the problem i am working on. we are supposed to use an integrating fa... | 5 | [
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Joint PDF of Cauchy - Integrating by partial fractions
February 6th 2010, 03:54 AM
maths3086
Joint PDF of Cauchy - Integrating by partial fractions
Hi MathHelpForum,
My question relates to the use of the "Jacobian" function to find the joint pdf of two cauchy random variables. I have searched previous posts... | 5 | [
-0.0322265625,
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-0.06103515625,
-0.0053100... | 28,068 | 28068 | |
Optimal Educational Investment: Domestic Equity and International Competition
ISRN Economics
Volume 2012 (2012), Article ID 909727, 4 pages
http://dx.doi.org/10.5402/2012/909727
Research Article
Optimal Educational Investment: Domestic Equity and International Competition
Department of Economics, Lancaster Universit... | 4 | [
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... | 28,069 | 28069 | |
integration problem
May 31st 2008, 11:20 PM #1
Newbie
Joined
May 2008
Posts
2
integration problem
Hi guys,
I'm super stuck with these two problems on one of my practice exams, can anyone help me out?
Find the integral between 4 and 3 of (u^2 + 1) / (u - 2)^2
and the antiderivative of cosxe^... | 5 | [
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0.0211181640... | 28,070 | 28070 | |
Abundant Exact Solition-Like Solutions to the Generalized Bretherton Equation with Arbitrary Constants
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 284865, 7 pages
http://dx.doi.org/10.1155/2013/284865
Research Article
Abundant Exact Solition-Like Solutions to the Generalized Bretherton Equation with ... | 5 | [
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... | 28,071 | 28071 | |
Horizontal asymptotes / infinite limits and natural log
June 23rd 2008, 08:33 PM #1
Newbie
Joined
Jun 2008
Posts
2
Horizontal asymptotes / infinite limits and natural log
Hi. This problem simply involves finding the horizontal asymptotes of the following function. While the calculator shows two (y = 0 wh... | 4 | [
-0.038330078125,
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-0.05908203... | 28,072 | 28072 | |
The Ornstein-Uhlenbeck-Type Model with a Hybrid Dividend Strategy
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 467948, 7 pages
http://dx.doi.org/10.1155/2013/467948
Research Article
The Ornstein-Uhlenbeck-Type Model with a Hybrid Dividend Strategy
School of Mathematical Sciences, Qufu Normal Univers... | 5 | [
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-0.0478515625,... | 28,073 | 28073 | |
Optimal Encoding of Bandlimited Signals
We now turn back to the encoding of signals. We are interested in encoding the set
B A (M)={f∈B A :|f(t)|≤M,t∈R}B A (M)={f∈B A :|f(t)|≤M,t∈R}
(1)
where
MM
is arbitrary but fixed. We shall restrict our discussion to the case where distortion is measured in
L ∞ [-T,T]L ∞ [-T,... | 4 | [
-0.07373046875,
-0.04248046875,
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0.08056640625,
-0.03173828... | 28,074 | 28074 | |
Find the definite integral using substitution
September 23rd 2009, 11:45 PM
The Power
Find the definite integral using substitution
Suppose I have this function where a = 0 and b = .5 not sure on the latex tags for that
$I(x) = \int \sqrt{t^4+1}$
and I let
$u = t^4+1$
and
$du = 4t^3dx$
... | 5 | [
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0.03125,
0.006134033203125,
0.0062561035... | 28,075 | 28075 | |
Response of Immunotherapy to Tumour-TICLs Interactions: A Travelling Wave Analysis
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 137015, 10 pages
http://dx.doi.org/10.1155/2014/137015
Research Article
Response of Immunotherapy to Tumour-TICLs Interactions: A Travelling Wave Analysis
School of Mathemat... | 5 | [
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0.01055908203125... | 28,076 | 28076 | |
The Field and Energy Distributions of the Fundamental Mode in the Solid-Core Photonic Crystal Fibers for Different Geometric Parameters
ISRN Optics
Volume 2013 (2013), Article ID 567501, 8 pages
http://dx.doi.org/10.1155/2013/567501
Research Article
The Field and Energy Distributions of the Fundamental Mode in the So... | 4 | [
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-0.09... | 28,077 | 28077 | |
trig integral 1/(1-sin(x)cos(x))
January 25th 2010, 07:15 PM
oblixps
trig integral 1/(1-sin(x)cos(x))
$\int_{0}^{\pi /2}{\frac{dx}{1-\sin (x)\cos (x)}}$
i saw this integral in a previous post and i'm curious on how to do it. i tried a wierstrauss substitution but that seems to make the problem extremely com... | 4 | [
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0.08251953125,
-0.0013... | 28,078 | 28078 | |
direct products problem
October 6th 2009, 07:30 AM
Chandru1
direct products problem
Suppose that G is a finite group such that for each subgroup H of G, there is a homomorphism $T:G \to H$such that [MATHT(h)=h[\MATH]for all $h \in H$. Show that G is a product of groups of prime
order.
October 6th 2009, 12:1... | 4 | [
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0.0155029296875,
... | 28,079 | 28079 | |
Disprove a statement
September 16th 2007, 07:41 AM #1
Newbie
Joined
Sep 2007
Posts
6
Disprove a statement
Disprove the statement “There is no positive integer n > 3 such that n^2 + (n + 1)^2 is a perfect square”.
Try n = 20: $20^2 + (20 + 1)^2 = 400 + 441 = 841 = 29^2$.
That's it for n less tha... | 4 | [
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-0.0162353515625,
-0.052490234... | 28,080 | 28080 | |
bra
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Now showing results 31-40 of 72
This is a booklet containing 36 problem sets that involve a variety of math skills, including scientific notation, algebra, geometry, and calculus. Each set of problems is contained on one page.
Learners will ... | 4 | [
0.00933837890625,
0.0390625,
0.044921875,
0.016357421875,
-0.031982421875,
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... | 28,081 | 28081 | |
Slope problems,
November 22nd 2010, 09:31 AM
vaironxxrd
Slope problems,
Ok so im a junior in high school and last year i failed geometry i don't want to be on the same path this year ETC...
Im doing slope stuff and i got different questions about this.
i understand that the equation is Y=Mx(slope)+B(Y,... | 4 | [
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0.044677734375,
0.02734375,
0.1474609375,
-0.1044921875,
0.013549804687... | 28,082 | 28082 | |
Learn about Junior Chemistry: The Mole 2
Male Speaker: Okay, now let's bring this back to the rule of chemistry okay. Let's say that we have 4.673 times ten to the eleven atoms of zinc and the question is how many moles do we have. Okay,
now listen, look at 4.673 times ten to the eleven atoms is a lot of atoms. Is it m... | 4 | [
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Cosmological New Massive Gravity and Galilean Conformal Algebra in 2 Dimensions
Advances in High Energy Physics
Volume 2011 (2011), Article ID 472718, 10 pages
http://dx.doi.org/10.1155/2011/472718
Research Article
Cosmological New Massive Gravity and Galilean Conformal Algebra in 2 Dimensions
Department of Science,... | 4 | [
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Math Help
October 18th 2009, 06:46 AM #1
Super Member
Joined
Aug 2008
Posts
903
A pide
Find a non-trivial solution in the first quadrant for:
$f+\frac{\partial f}{\partial x}+\frac{\partial f}{\partial y}=\int_{x}^{\infty}\int_{y}^{\infty} f(u,v)dvdu$
Hint: Can you think of a trial function of... | 5 | [
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-0.022583007812... | 28,085 | 28085 | |
[Calculus] Newton's Law of Cooling
March 1st 2009, 04:38 PM #1
Newbie
Joined
Mar 2009
Posts
6
[Calculus] Newton's Law of Cooling
In my assignment, my Calculus teacher was murdered.
The three suspects are:
An English Teacher (no alibi from 9:15-10:00AM)
The Principal (no alibi from 10:05-10:5... | 4 | [
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... | 28,086 | 28086 | |
Method for working out if subspace is closed under Vec+/Scal.x
September 13th 2010, 01:26 AM #1
Newbie
Joined
Apr 2010
Posts
18
Method for working out if subspace is closed under Vec+/Scal.x
Hi, I understand what these two ideas mean, but I'm a bit lost on how to actually sit down and work out algebraica... | 5 | [
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0.0115... | 28,087 | 28087 | |
Coordinate systems help!
Show that the line with equation y=2x+5 is a tangent to the ellipse with equation 9x^2+4y^2=36.
Hello, rednest! Show that the line with equation $y\:=\:2x+5\;\;{\color{blue}[1]}$ is a tangent to the ellipse with equation $9x^2+4y^2\:=\:36\;\;{\color{blue}[2]}$ First, find their intersection(s)... | 4 | [
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0.0116... | 28,088 | 28088 | |
Equation of Parabola
What is the equation of a parabola that goes through points (0,1), (–1,6),and (2,3)?
Substitute the given points into the model $y = ax^2 + bx + c$: $(0, \, 1) \Rightarrow 1 = c$. Update the model: $y = ax^2 + bx + 1$. $(-1, \, 6) \Rightarrow 6 = a - b + 1 \Rightarrow a - b = 5$ ....
(1) $(2, \, 3... | 4 | [
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some inequalities
March 25th 2007, 12:41 PM #1
Newbie
Joined
Sep 2006
From
Chile
Posts
10
some inequalities
started college and havent been doing so good and well i have this test soon and im having trouble with some questions... (i appologize in advance i have to translate from spanish... so if
... | 5 | [
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-... | 28,090 | 28090 | |
proof - binomial fraction simplifies to a constant
November 6th 2012, 02:44 PM #1
Newbie
Joined
Nov 2012
From
Ireland
Posts
17
proof - binomial fraction simplifies to a constant
Hi, just starting chapter review of Algebra 1. The first question is:
Show that the following simplifies to a constant... | 4 | [
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0.02160644531... | 28,091 | 28091 | |
More antiderivative questions
November 30th 2008, 06:33 PM
helppalusmath
More antiderivative questions
1) f(x) = -13/(1 +x^2 )
The question is to find the antiderivative. I'd assume it would be inverse tangent X -13. Am I correct?
2) (1 pt) Given that the graph of f(x) passes through the point (5,5) a... | 5 | [
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0.020751... | 28,092 | 28092 | |
Proof for Tautologies uisng equations
October 9th 2011, 11:38 AM #1
Junior Member
Joined
Oct 2011
Posts
27
Proof for Tautologies uisng equations
Hi all,
I looking for some explanation on how to prove a equation a tautolgies. I can quite easl do this using turth table. But when i try to do this using... | 4 | [
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-0... | 28,093 | 28093 | |
How to solve this best least squares fit problem
December 7th 2009, 09:52 AM
Computer Science guy
How to solve this best least squares fit problem
Hello,
I find myself needing to solve a number of best least squares fit problems, and honestly I don't remember the specifics of how it's done. Therefore I'm tr... | 4 | [
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-0.02038574... | 28,094 | 28094 | |
Solving an equation by iteration
April 18th 2011, 02:46 AM #1
Newbie
Joined
Apr 2011
Posts
1
Solving an equation by iteration
Hi!
I need to solve an equation for a course for psychology, but since I am studying psychology maths is not really my thing...
The equation I need to solve is:
xt+... | 4 | [
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A problem from "Introduction to Topological Manifolds"
August 5th 2011, 10:55 PM #1
A problem from "Introduction to Topological Manifolds"
Could anyone help me solve the following problem ?
Show that a covering map is proper if and only if it is finite-sheeted.
This is the problem 11-10 from "Introducti... | 4 | [
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Di
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In this problem set, learners will analyze a table of global electricity consumption to answer a series of questions and consider the production of carbon dioxide associated with that consumption.
Answer key is provided. This is part of Earth Math:... (View More)... | 4 | [
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Median from histograms - using proportinality method
October 23rd 2012, 08:18 AM #1
Newbie
Joined
Jun 2012
From
My Desk
Posts
11
Hi guys, there's a question in my practice papers
Time (m) minutes Frequency F.D.
0<20 20 1
20<30 30 3
30<40 45 4.5
40<60 60 3
60<100 48 1.2
I ... | 4 | [
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... | 28,098 | 28098 | |
Euler problems/151 to 160
From HaskellWiki
< Euler problems
(Difference between revisions)
(Added problem_152)
Newer edit →
Line 10: ... | 5 | [
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