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Finding the Sum of a Power Series
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Finding the Sum of a Power Series
Asked by Khanh Son Lam, student, College de Maisonneuve on Ja... | 5 | [
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[SOLVED] Triangular matrix/determinant
September 15th 2008, 02:11 PM
arbolis
[SOLVED] Triangular matrix/determinant
The problem says "Reduce the following matrix into an upper triangular one in order to find its determinant".
I wonder why they ask me to reduce it since the calculus would only get more compli... | 5 | [
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Proposition 1
If a straight line is cut in extreme and mean ratio, then the square on the greater segment added to the half of the whole is five times the square on the half.
Let the straight line AB be cut in extreme and mean ratio at the point C, and let AC be the greater segment. Produce the straight line AD in a ... | 4 | [
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Problem in integration
December 14th 2010, 01:53 AM #1
Junior Member
Joined
Aug 2010
Posts
57
Problem in integration
$\int \frac{x^3}{(x^2+5)^2} dx <br />$
$<br /> u=x^2<br />$
$<br /> du = 2xdx.\frac{x^2}{x^2}<br />$
$<br /> \frac{udu}{2}=x^3dx<br />$
$\frac{1}{2}\int \frac {udu}{(u+5)... | 5 | [
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Finding the velocity from displacement
2 Answers
I like to use a filtered derivative to do that.
A transfer function in the form s/(tau*s+1)^2 with the right "tau" will give you something close to "s" for low frequency and close to "1" for high frequency, limiting that spike that you probably
see in your model.
You ... | 4 | [
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Wilcoxon test - File Exchange - MATLAB Central
Please login to add a comment or rating.
Comments and Ratings (24)
if you type: wilcoxon it will works showing the example.
in the other cases you have to write:
21 x1... | 4 | [
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Math Help
August 9th 2009, 05:28 AM #1
Newbie
Joined
Aug 2009
Posts
23
Stats
Q. If all the 1 pound cans of beans filled by a food processor have a mean weight of 16.00 ounces with a standard deviation of 0.02 ounces, at least what percentage of the cans must contain
between 15.80 and 16.20 ounces of... | 5 | [
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finding negative number N so that f(x) - L <e
August 1st 2012, 06:58 AM
zalar81957
finding negative number N so that f(x) - L <e
A positive number e and the limit L of a function f at -infinity are given. Find a negative number N such that ABS(f(x) -L) <e if x<N
lim
x approaches - infinty of 1/(x+19) =0... | 5 | [
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A Functional Analysis Framework for Modeling, Estimation and Control in Science and Engineering
Introduction to Functional Analysis in Applications
Example 1: Heat Equation
Some Preliminaries: Hilbert, Banach, and Other Spaces Useful in Operator Theory
Return to Example 1: Heat Equation
Example 2: General Transport Equ... | 4 | [
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Eight queens revisited
January 1, 2007 by Jared
Jon Harrop spotted that the Ocaml code was calling is_threatened 64515 times compared to the C++ calling is_threatened just 1915 times. I eventually spotted the bug in the C++ code: next_valid_posn
was not correctly iterating through the x positions. The fix was straigh... | 5 | [
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Telescoping Series
June 30th 2008, 05:06 PM #1
Junior Member
Joined
Jun 2008
Posts
46
Telescoping Series
$a_n = \sum^{\infty}_{n=1}\frac{-1}{2(n+2)(n+3)}$
It is known that limit of the terms is $0$ and that the series converges to $\frac{-1}{6}$.
I have a problem that asks for $c_n$ where $a_n ... | 5 | [
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On the Electromagnetic Mass of a Moving Electron
From Wikisource
On the Electromagnetic Mass of a Moving Electron (1907)
by
IN his discussion of the electromagnetic mass of a moving electron (Theorie der Elektrizität, ii. p. 205), Abraham raises an objection to the Lorentz conception of an electron as having, at... | 4 | [
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A subspace of a Hausdorff space is Hausdorff
September 24th 2011, 11:35 AM #1
MHF Contributor
Joined
Mar 2010
From
Florida
Posts
3,093
Thanks
5
A subspace of a Hausdorff space is Hausdorff
A subspace of a Hausdorff space is Hausdorff.
Let X be Hausdorff and $Y\subset X$
Since Y is a sub... | 5 | [
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Simulink
Wavelet Families
The Wavelet Toolbox™ software includes a large number of wavelets that you can use for both continuous and discrete analysis. For discrete analysis, examples include orthogonal wavelets (Daubechies'
extremal phase and least asymmetric wavelets) and B-spline biorthogonal wavelets. For continu... | 4 | [
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Percentage
Percentage Error
The difference between Approximate and Exact Values,
... | 4 | [
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Group Theory - Sylow and Conjugation
January 21st 2009, 09:30 AM #1
Newbie
Joined
May 2008
Posts
3
Group Theory - Sylow and Conjugation
A couple of questions I had hard time solving (and not succeeded).
1. We showed that for every p-sylow group P in G, the following is true:
$N_G(N_G(P)) = N_G(P... | 4 | [
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... | 5,215 | 5215 | |
How do I Define Zero Truncated distribution to find MLEs And How do I Calculate Loglikelihood value
Dear Support,
I needed an urgent help to work on my thesis project.
Could someone please help me out with Log-likelihood Calculations by MATLAB for the Lognormal, Gamma and Weibull distributions. Also, for Poisson and... | 5 | [
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ssumptions
Four Assumptions Of Multiple Regression That Researchers Should Always Test
Jason W. Osborne and Elaine Waters
North Carolina State University and University of Oklahoma
Most statistical tests rely upon certain assumptions about the variables used in the analysis. When these assumptions are not met the re... | 4 | [
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Factoring Quadratics
To "Factor" (or "Factorise" in the UK) a Quadratic is to:
find what to multiply to get the Quadratic
It is called "Factoring" bec... | 4 | [
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parametric equation
August 29th 2006, 01:02 AM
ling_c_0202
parametric equation
I don't know how to prove it...
(a) for parametric equations x = f(t) and y = g(t), where t is a parameter, show that
$<br /> \frac{d^2y}{dx^2}\:=<br /> \frac{\frac{d}{dt}(\frac{dy}{dx})} {\frac{dx}{dt}}$
(b) Given the ... | 5 | [
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Distance of a Point to a Plane
Here we present several basic methods for representing planes in 3D space, and how to compute the distance of a point to a plane.
Planes
A surface is that which has length and breadth only. [Book I, Definition 5]
The extremities of a surface are lines. [Book I, Definition 6]
A plane sur... | 4 | [
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Di
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This is an activity about measuring angular size and understanding the solar and lunar proportions that result in solar eclipses. Learners will use triangles and proportions to create a shoebox
eclipse simulato... | 4 | [
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... | 5,221 | 5221 | |
Fixed radius disjoint ball covering vs. open covering
November 22nd 2010, 05:33 AM #1
MHF Contributor
Joined
Nov 2010
Posts
1,763
Thanks
681
Fixed radius disjoint ball covering vs. open covering
My professor posted the following problem, and I'm at a loss for where to begin. This is an introduction R... | 4 | [
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0.015625,
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find the limits of the function
February 7th 2009, 04:35 PM #1
Junior Member
Joined
Oct 2008
Posts
34
find the limits of the function
consider the function
g(x) = [((x-8)^2)*((x-1)^3)] / [sqrt(x-5)]
i need to find the limits ..
x -> 8+
x-> 8-
x-> 5+
x-> 5-
x-> 1+
x-> 1-
... | 5 | [
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Adaptive PIF Control for Permanent Magnet Synchronous Motors Based on GPC
Open Access This article is
• freely available
• re-usable
Article
Adaptive PIF Control for Permanent Magnet Synchronous Motors Based on GPC
*
Author to whom correspondence should be addressed; E-Mail:
songbao@hust.edu.cn
; Tel.: +86-2... | 4 | [
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IVP using Leibniz formula
May 10th 2011, 02:22 PM #1
Junior Member
Joined
Oct 2008
Posts
70
IVP using Leibniz formula
How does one formulate this integral equation as an initial value problem?
u(t)=1 + integral from 0 to t (s ln (s/t) u(s) ds)
we're supposed to use Leibniz formula but I'm not s... | 4 | [
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... | 5,225 | 5225 | |
Think Back
Cole thinks of a number.
He then does the following operations:
Multiply by 2, subtract 2, multiply by 3 then add 18 (in that order).
He finds that the number he ends up with is 8 times his original number.
What was Cole's original number?
... | 4 | [
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0.05... | 5,226 | 5226 | |
Math Forum: 0! = 1
Why does 0! = 1 ?
Usually n factorial is defined in the following way:
n! = 1*2*3*...*n
But this definition does not give a value for 0 factorial, so a natural question is: what is the value here of 0! ?
A first way to see that 0! = 1 is by working backward. We know that:
1! ... | 4 | [
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Circular Curves | Simple Curves
Terminologies used in simple curve
• PC = Point of curvature. It is the beginning of curve.
• PT = Point of tangency. It is the end of curve.
• PI = Point of intersection of the tangents.
• T = Length of tangent from PC to PI and from PI to PT. It is known as subtangent.
• R =... | 4 | [
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0.09033203125,
0.01123046875,
-0.03955078125,
0.02978515625,
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-0.03686523... | 5,228 | 5228 | |
disproving an isomorphism
1. April 12th 2012, 05:29 PM #1
2. April 13th 2012, 03:53 PM #2
Re: disproving an isomorphism
the group $\mathbb{Z}_3 \oplus \mathbb{Z}_3 \oplus \mathbb{Z}_3$ is abelian, but in $\mathrm{SL}_3(\mathbb{Z}_3)$, if:
$A = \begin{bmatrix}1&1&0\\0&1&2\\0&0&1 \end{bmatrix}, B... | 5 | [
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0.02294921875,
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0.0... | 5,229 | 5229 | |
Cattus ex machina!
Let's get the idea of Schrodinger's cat right: It's a funky aspect of human perspectives. The math that goes with it is really easy, contrary to popular opinion, and entertaining, too!
(This article is about Schrodinger’s cat. If you thought it was about LOLCATS… well, it could be.)
When you’re stu... | 4 | [
0.034423828125,
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0.005615234... | 5,230 | 5230 | |
series convergent or divergent by ratio test
March 5th 2009, 09:27 AM
oceanmd
series convergent or divergent by ratio test
Please determine whether the series is convergent or divergent by ratio test.
Series (2n-1)/2^(3n)
First I solved that lim a(n+1)/an =1, so the test fails, now I am rethinking it and... | 5 | [
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... | 5,231 | 5231 | |
Pumping up the waterjet power
Want to maximize your waterjet's performance? Among the options for doing so are adding horsepower to the pump, by either running at higher pressure, or using a larger or two nozzles. This article
discusses the options and provides guidelines to help you decide what's best for your particu... | 4 | [
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0.... | 5,232 | 5232 | |
Math Help
April 2nd 2006, 06:35 PM #1
Newbie
Joined
Mar 2006
Posts
17
Urgent Please Help Cost
1. The following function represents the cots in hundreds of dollars for producing pens, where x represents 1000's of units
c(x)=.4x^2-16x+200 , 25 ≤ x ≤ 40
a) Estimate the cost for making the 36th 100... | 4 | [
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0.078125,
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0.09375,
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0.03369140625,
0.0002956390380859375,
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Generalising Gödel's Theorem with Multiple Worlds. Part II.
Introduction Last time
we looked at a method for testing whether propositions of provability logic were valid by looking at the consequences of propositions within nested collections of worlds. This lends itself naturally
to an algorithm that we can implement... | 4 | [
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Math Help
October 20th 2009, 12:07 PM #1
Newbie
Joined
Oct 2009
Posts
14
Derivative
going through practice problems for a test
Am I doing this correctly?
Find the differential:
$y=\sqrt{9-x^2}=(9-x^2)^\frac{1}{2}$
via power rule: $y'=\frac{1}{2}(9-x^2)^\frac{-1}{2}$
and so,
... | 5 | [
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Example 8.4.7 (a): Using Taylor's Theorem
To use a second-degree polynomial to approximate a function we need, according to Taylor's theorem, three derivatives of the function. So, let's go:
• f(x) = tan(x^2+1)
f(0) = 1.5574
• f'(x) = 2*(1+tan(x^2+1)^2)*x
f'(0) = 0
• f''(x) = 8*tan(x^2+1)*(1+tan(x^2+1)^... | 5 | [
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0.... | 5,236 | 5236 | |
normal subgroups proofs please help
October 17th 2010, 12:21 AM #1
Junior Member
Joined
May 2010
Posts
57
normal subgroups proofs please help
Let f: G -> K be an epimorphism of groups. If N is a normal
subgroup of G, show that f(N) := {f(n) | n e N} is a normal subgroup of K.
please note in this... | 5 | [
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0.000189781... | 5,237 | 5237 | |
Functions and Curve Sketching
November 27th 2008, 10:12 AM #1
Newbie
Joined
May 2008
Posts
9
Functions and Curve Sketching
A curve is given by the equation $y = \frac{ax^2 + bx + c}{dx^2 + ex + f}$ . The equations of the asymptotes to the curve are x = 1, x = 3 and y = 1. The curve passes through the poi... | 4 | [
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... | 5,238 | 5238 | |
[SOLVED] find the value of k
October 1st 2008, 06:27 PM #1
Member
Joined
Sep 2008
Posts
222
[SOLVED] find the value of k
Hey again,
This is on page 851 #15 on the SAT OG Book.
If $\frac{n}{n-1}$ multiply $\frac{1}{n}$ multiply $\frac{n}{n+1}$ = $\frac{5}{k}$
for positive integers n and k, wh... | 4 | [
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0.01019287109375,
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-0.01879882... | 5,239 | 5239 | |
The Effect of Inharmonic Partials on Pitch of Piano Tones :: Institutional Repository
The Effect of Inharmonic Partials on Pitch of Piano Tones
Piano tones have partials whose frequencies are sharp relative to harmonic values. A listening test was conducted to determine the effect of inharmonicity on pitc... | 4 | [
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0.0693359375,
0.0227050781... | 5,240 | 5240 | |
Matrix Multiplication and Solving for X?
February 11th 2013, 02:00 AM #1
Newbie
Joined
Feb 2013
From
Canada
Posts
22
Matrix Multiplication and Solving for X?
Find X if
[5 -8]X + [0 9] = [-3 6]
[8 -1].... [0 -8] ....[-1 -9]
X =?
My steps:
[5 -8]X + [0 9] = [-3 6]
[8 -1] ...... | 5 | [
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-... | 5,241 | 5241 | |
integration by parts''.
integrate by parts y^2(log(y)) between 1 and x thats int,y^2(multiplie by logy) between 1 and x in the form A(x)+{intB(y) between 1 and xwith respect to y},,,,,,,,,,,,the answer is ((x^3)/3)
multiplied by(logx)-((y^2)/2),,,,,,,sorry i dont quite have latex prrammed in my brain at the mom... | 5 | [
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0... | 5,242 | 5242 | |
Vibration Sensor Data Denoising Using a Time-Frequency Manifold for Machinery Fault Diagnosis
Open Access This article is
• freely available
• re-usable
Article
Vibration Sensor Data Denoising Using a Time-Frequency Manifold for Machinery Fault Diagnosis
^1
Department of Precision Machinery and Precision Instr... | 4 | [
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Relative Distance Lesson Plans & Worksheets | Lesson Planet
Relative Distance Teacher Resources
Find Relative Distance educational ideas and activities
Showing 1 - 20 of 6,439 resources
Students make several models of the solar system to learn the positions of the planets in the solar system as well as relative dist... | 4 | [
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0.0164794921875,
... | 5,244 | 5244 | |
In the figure, each side of square ABCD has length 1, the
Author Message
TAGS:
In the figure, each side of square ABCD has length 1, the [#permalink] 25 Sep 2008, 02:05
... | 4 | [
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Solving Simultanteous Congruences
November 7th 2010, 07:41 AM
chili5
Solving Simultanteous Congruences
Hi:
I'm having some issues trying to figure out how to solve this:
$<br /> [3][x] + [5][y] = [6]<br /> [5][x] + [7][y] = [14]<br />$
The modulus is 20. So these are equivalent to the congruences:... | 5 | [
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0... | 5,246 | 5246 | |
in
Math::Financial - Calculates figures relating to loans and annuities.
$calc = new Math::Financial(fv => 100000, pv => 1000); $calc->set->(pmt => 500, ir => 8);
$calc->compound_interest(find => 'fv');
This package contains solves mathematical problems relating to loans and annuities.
The attributes that are used ... | 4 | [
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0.0145874023437... | 5,247 | 5247 | |
Meditation, The Art of Exploitation
Bayes probability model
Bayes probability model is an important probability model to predict prior stage probabilities of a multi-stage probability model. Typically it's applied to a 2 stage probability model where the 2nd
stage is dependent on the events in the first stage.
Unlike... | 4 | [
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0.0625,
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0.01... | 5,248 | 5248 | |
Probability of NVP Help for Risk Analysis and - Transtutors
Probability of NVP
Example
Assume that a project has a mean of Rs 40 and standard deviation of Rs 20. The management wants to determine the probability of the NPV under the following ranges:
(i) Zero or less,
(ii) Greater than zero,
(iii) Between the range... | 5 | [
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-0.0244... | 5,249 | 5249 | |
Optimisation Problem - Ships
December 9th 2008, 08:48 AM
scherz0
Optimisation Problem - Ships
Hello everyone,
I am having trouble with this problem, and I have made my problem and work available at ImageShack - Image Hosting :: shipoptimisationprobbx7.jpg (The diagram is my own, not given by the
questio... | 5 | [
0.015625,
0.018310546875,
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0.0130615234375,
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0.016845703125,
-0.080... | 5,250 | 5250 | |
Pricing European and Discretely Monitored Exotic Options under the Lévy Process Framework
In this article we consider both European and discretely monitored exotic options (Bermudan and discrete barrier) in a market where the underlying asset follows a geometric Lévy process. First, we
briefly introduce this extended f... | 4 | [
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... | 5,251 | 5251 | |
Number Series Brain Teaser
Barbara sent in this doozy. I have yet to figure it out.
What is the missing number?
6, 9, 27, 54, ?, 2241
Anyone have any ideas?
When you’re nearly comatose from over consumption of Thanksgiving’s finest, figure this out to give your brain some exercise.
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» Permalink | Comm... | 4 | [
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Regression Line Calculation (SLOPE)
September 19th, 2000, 04:56 PM #1
Member
Join Date
May 1999
Location
Arizona, U.S.A.
Posts
101
Regression Line Calculation (SLOPE)
In Microsoft Excel there is a SLOPE function. What I need to do is translate the formula of this SLOPE function to work in a Visual C+... | 5 | [
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0.031494140625,
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0.1396484375,
-0.11279296875,
0.0073... | 5,253 | 5253 | |
Baker's Math: A tutorial
In October, 2008 I posted a formula for Greenstein's Jewish Sour Rye which converted his recipe, which was written in volume measurements, to ingredient weights. I have made this bread many times
since, but I've never bothered to calculate the baker's percentages for the formula. I decided to d... | 4 | [
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... | 5,254 | 5254 | |
Percents
March 12th 2010, 02:31 AM
donnagirl
Percents
A number is increased by 25% and the resulting number is then decreased by 20%. The final number is what percent of the original number?
I know the answer is 100 but how do I show it?
March 12th 2010, 02:54 AM
Sudharaka
Quote:
Dear donnagirl... | 4 | [
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Using Thermistors in Temperature Tracking Power Supplies
Using Thermistors in Temperature Tracking Power Supplies
© Nov 29, 2001, Maxim Integrated Products, Inc.
Abstract: This article provides a simple, intuitive tutorial on negative temperature coefficient (NTC) thermistors and how to make basic use of them in gen... | 5 | [
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Wiki
From Wikipedia, the free encyclopedia
In information theory, entropy is a measure of the uncertainty associated with a random variable. The term by itself in this context usually refers to the Shannon entropy, which quantifies, in the
sense of an expected value, the information contained in a message, usually in... | 4 | [
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0.0090942... | 5,257 | 5257 | |
Linear transformations and linear independance
March 9th 2013, 09:44 AM #1
Newbie
Joined
Feb 2013
From
Coventry
Posts
2
Linear transformations and linear independance
Hi,
I was curious as to whether this statement was true or not, If it's true then can anyone show me a hint for the proof of it.
... | 5 | [
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solving simultaneous equations
MATLAB and Simulink resources for Arduino, LEGO, and Raspberry Pi
Subject: solving simultaneous equations
From: Nicole
Date: 6 Oct, 2010 14:14:23
Message: 1 of 4
I'm having a little trouble solving these three equations for 3 unknowns (x,y,z) in MATlab:
F(1)= 47*y - 2*x + 29*z + 2*x... | 4 | [
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Extremely difficult induction proof problem
January 29th 2010, 12:38 PM
Runty
Extremely difficult induction proof problem
I dunno who thought up this one, but it is clearly for masochists.
Prove that for all $x > 0$ and all positive integers n
$e^x>1+x+\frac {x^2}{2!}+\frac {x^3}{3!}+...+\frac {x^n}{n!... | 5 | [
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st: xtmixed versus spss mixed; random intercept only model
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Th... | 4 | [
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Expected Value
Section 3.5
The expected value is the long-term average of an experiment.
Example 1:
In a Roulette game, bet $1.00 o... | 4 | [
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Global Extrema
On the last page you learned how to find local extrema; one is often more interested in finding global extrema:
We say that the function f(x) has a global maximum at x=x[0] on the interval I, if f(x) has a global minimum at x=x[0] on the interval I, if
If f(x) is a continuous function on a closed bound... | 5 | [
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[SOLVED] Equation of a plane - Given z intercept and parametric equation
May 23rd 2010, 10:05 AM
Kakariki
[SOLVED] Equation of a plane - Given z intercept and parametric equation
Hey,
I have been working on this question for the past couple days (searching the internet, searching for examples in textbook et... | 4 | [
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ge
Replies: 25
John E. Franklin wrote:
Is the back triangle slanted inward on the bottom, thus reducing the volume a little?
Is the front triangle side exactly vertical?
Hi,
thank you for asking.
Yes, the back triangle (back border "wall" of the volume to be determined) is slanted inward on the bottom.... | 4 | [
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Insulation Ratings: Calculating R Factor, K Factor & C FactorInsulation Ratings: R Factor, K Factor & C Factor
Insulation Ratings: R Factor, K Factor & C Factor
The R Factor, K Factor and C Factor of Insulation
Insulation terms can be quite confusing to anyone outside the industry. If you’ve ever bought insulation f... | 4 | [
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0.0603027... | 5,266 | 5266 | |
Triple integral
September 17th 2010, 06:10 AM #1
Senior Member
Joined
Apr 2009
Posts
306
Triple integral
Find the volume of the ellipsoid $\frac{x^2}{a^2}+\frac{y^2}{b^2}+\frac{z^2}{c^2}=1$ by solving the triple integral after making the transformation $x = au, y = bv$ and $z = cw$
I'm just a bit co... | 5 | [
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Geometric progression
and these question's answer is 40? In a Geometric progression : a5 is 24 more than a3. => a5-a3=24 if terms are Integer and positive. a3+a5=?
A geometric progression is one of the form $a, ar, ar^2, ar^3,\ldots$. So, suppose $a_0 = a, a_1 = ar, a_2 = ar^2, a_3 = ar^3, a_4 = ar^4, a_5 = ar^5$. The... | 5 | [
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Delta Transformer Calculations
Extracted from Mike Holt’s Illustrated Guide to Electrical Calculations
To correctly specify a transformer with delta winding connections, you need to know how to do the related calculations.
The names for transformers configurations such as delta and wye derive from the way the winding... | 4 | [
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Derivatives - Please Check my answers
October 18th 2007, 03:12 PM #1
Derivatives - Please Check my answers
1) Differentiate
Y = x^2sinxtanx
f(x) = sinx ; f'(x) = cosx
g(x) = tanx ; g'(x) = sec^2
So I get:
Y' = 2cosxtanx + x^2sinxsec^2
2) Find an equation of the tangent line to the cur... | 5 | [
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0.01153564453... | 5,270 | 5270 | |
Performance analysis and optimized design of backward-curved airfoil centrifugal blowers.
Link/Page Citation
INTRODUCTION
A blower is a gap pump that is capable of providing moderate to high pressure rise and... | 4 | [
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th
Physics[`*`] - generalized product that operates like a commutative, anticommutative, or noncommutative product depending on the parity of its operands
Physics[`^`] - generalized exponentiation
Calling Sequence
a * b * c ...
a ^ b ...
Parameters
a, b, c, ... - arbitrary algebraic expressions that typi... | 5 | [
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-0.... | 5,272 | 5272 | |
Hypothesis Testing For a Sample Mean
Hypothesis Testing For a Population Mean
The Idea of Hypothesis Testing
Suppose we want to show that only children have an average higher cholesterol level than the national average. It is known that th... | 5 | [
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... | 5,273 | 5273 | |
integral points
the number of integral points on the hyperbola{x}^{2}-{y}^{2}={2000}^{2} are can we factorize 2000 in 2 and 5 help
Hello, prasum! The number of integral points on the hyperbola $x^2-y^2\:=\:2000^2$ is __. We have: . $x^2 - y^2 \:=\:2000^2$ n . . $(x+y)(x-y) \:=\:4,\!000,\!000$ As ASZ pointed out, $2000... | 5 | [
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-0.... | 5,274 | 5274 | |
Items tagged with integer
If a function is differentiable at some point c of its domain, then it is also continuous at c. However here we extend the notion of differentiability to be valid for individual points on the real
number line, specifically positive integers.
f(n)=(-1)^n* n^(1/n)
THEOREM MRBK 8.0
f=f' / (I*P... | 4 | [
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3 Logit Models in Stata
Stata has several commands that can be used to fit logistic regression models by maximum likelihood. The basic commands are logit for individual data and blogit for grouped data. There is also a
logistic command that presents the results in terms of odd-ratios instead of log-odds and can produc... | 5 | [
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0.0039672... | 5,276 | 5276 | |
Commutative Algebra
Posets
A set $\Sigma$ is called a partially ordered set or a poset with respect to a relation $\le$ if for all $\sigma, \tau, \rho\in\Sigma$:
1. $\sigma\le\sigma$ (reflexivity)
2. $\sigma\le\tau\le\sigma\implies\sigma=\tau$ (antisymmetry)
3. $\rho\le\sigma\le\tau\implies\rho\le\tau$ (transiti... | 4 | [
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Help
dsolve - solve ordinary differential equations (ODEs)
Calling Sequence
dsolve(ODE)
dsolve(ODE, y(x), options)
dsolve({ODE, ICs}, y(x), options)
Parameters
ODE - ordinary differential equation, or a set or list of ODEs
y(x) - any indeterminate function of one variable, or a set or list of t... | 4 | [
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0.0168457031... | 5,278 | 5278 | |
Math Help
April 26th 2006, 04:58 AM #1
Newbie
Joined
Apr 2006
Posts
19
need help here
Q1) An oscillating signal voltage is given by E=125cos(wt-&)millivolts, where the angular frequency is w=123pi,phase angle is &=pi/2,and t= time in seconds. The triggering mechanism of an
oscilloscope starts the sw... | 5 | [
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... | 5,279 | 5279 | |
Use of the original von Bertalanffy growth model to describe the growth of barramundi, Lates calcarifer (Bloch).
Link/Page Citation
Abstract--In the original von Bertalanffy growth equation, the rate of change in body mass of an individual is assumed to result from two ... | 4 | [
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0.01336669921875,
-0.02... | 5,280 | 5280 | |
Airplane Engines
September 25th 2009, 01:31 PM #1
Junior Member
Joined
Sep 2009
From
Over there
Posts
30
Airplane Engines
"An airplane needs at least half of its engines working to stay airborne. If an engine independently functions with probability p, for what values of p is an airplane with three e... | 5 | [
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numpy.random.RandomState.gumbel
numpy.random.RandomState.gumbel¶
RandomState.gumbel(loc=0.0, scale=1.0, size=None)¶
Gumbel distribution.
Draw samples from a Gumbel distribution with specified location and scale. For more information on the Gumbel distribution, see Notes and References below.
... | 5 | [
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0.00503540039... | 5,282 | 5282 | |
Finding diagonalize matrix
November 5th 2010, 08:04 AM #16
Ok. In order to compute the eigenvalues, you set the following determinant,
$|A-\lambda I|=\left|\begin{matrix}17-\lambda &16 &16\\ 16 &17-\lambda &16\\ 16 &16 &17-\lambda\end{matrix}\right|,$
equal to zero. The equation you get is $-(\lambda-49)... | 5 | [
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Visualizing complex analytic functions using domain coloring
f ( z ) = f ( z[0] ) + f ′( z[0] ) ( z − z[0] ) + 1 2! f ′′( z[0] ) ( z − z[0] )^2 + …
Assume that
f ( z ) = a z + b c z + d ( ad − bc ≠ 0 ).
They have lots of interesting properties, such as mapping circles to circles (if we consider straight lines as c... | 4 | [
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0.04833984375,
0.046142578125,
-0.0693359375,
-0.046875,
-0.06298828125,
-0.08... | 5,284 | 5284 | |
Posts about AMCMC on Why?
Ratio-of-uniforms
This post is based on chapter 1.4.3 of Advanced Markov Chain Monte Carlo. Previous posts on this book can be found via the AMCMC tag.
The ratio-of-uniforms was initially developed by Kinderman and Monahan (1977) and can be used for generating random numbers from many stan... | 5 | [
-0.1025390625,
0.059326171875,
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-0.0162353515625,
0.055419921875,
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-0.0130615234375,
-0.04736328125,
0.020263671875,
0.006927490234375,
0.041748046875,
0.12060546875,
-0.0263671875,
0.0294189453125,
-0.05322265625,
0.043212890625,
... | 5,285 | 5285 | |
Centrifugal Pump
Centrifugal pumps are the most commonly used turbo machinery devices. They are used to raise the pressure or induce flow in a control volume. Centrifugal pumps are radial flow devices. Various kinds
of centrifugal pumps are available in the market with different construction details. But working princi... | 4 | [
-0.040771484375,
-0.00750732421875,
-0.035400390625,
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-0.01324462890625,
0.05322265625,
0.005035400390625,
-0.068359375,
0.031982421875,
0.05908203125,
0.064453125,
-0.05517578125,
0.003692626953125,
0.0186767578125,
-0.05419921875,
... | 5,286 | 5286 | |
Math Help
August 24th 2009, 11:05 PM #1
Junior Member
Joined
Aug 2009
Posts
62
Limit
Hi everybody,
i must calculate these following limits:
1)- $\lim_{x \to 0} \frac{1-coxcos2x...cosnx}{x^2}$
2)- $\lim_{x \to 0}\frac{1-cosxcos^2(2x)...cos^n(nx)}{x^2}$
Can you help me please?
And... | 5 | [
-0.0096435546875,
0.04638671875,
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0.064453125,
0.01416015625,
0.004974365234375,
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0.03271484375,
-0.0194091796875,
-0.0546875,
0.0059814453125,
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0.022216796875,
-0.0091552734375,
-0.003021240234375,
-0.06591796875,
0.02197265625,
-0... | 5,287 | 5287 | |
Test
The Z-Test is implemented as follows:
Two Sample Test
Assumptions
The assumptions/conditions needed when testing the difference between two percentages (proportions) using Maritz Stats include:
1. Measurement scale is at least nominal
2. Random samples
3. Weighting is not used
4. The random variables ar... | 4 | [
0.0267333984375,
0.0712890625,
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0.02685546875,
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0.0303955078125,
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0.08837890625,
0.026... | 5,288 | 5288 | |
ThetaML Language Reference
Welcome to THETAWIKI. If you like to create or edit a page please make sure to login or register an account. All registered users please make sure to provide a valid email address.
ThetaML Language Reference
From ThetaWiki
ThetaML
The design principle of ThetaML (Theta Modeling Language) ... | 5 | [
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0.064453125,
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0.046875,
-0... | 5,289 | 5289 | |
related rates with triangle
September 22nd 2011, 12:14 PM #1
related rates with triangle
basically I don't understand the suggestion on how this was set up
Let $\theta$ (in radians) be an angle in a right triangle, and let x and y, respectively, be the lengths of the sides adjacent to and opposite $\theta$ S... | 5 | [
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0.0751953125,
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0.0693359375,
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0.05322265625,
-0.051025390625,
-0.03125,
... | 5,290 | 5290 | |
Continuous Functions Lesson Plans & Worksheets | Lesson Planet
Continuous Functions Teacher Resources
Find Continuous Functions educational ideas and activities
Showing 1 - 20 of 80 resources
In this continuous function worksheet, students examine a graph. They determine a rate during an interval of time. This one-p... | 4 | [
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-0.000598907470703125,
-0.0186767578125,
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-0.08056640625,
0.078125,
0.07275390625,
0.047607421875,
0.07666015625,
-0.01287841796875,
0.023681640625,
0.08984375,
-0.026611328125,
0.00026702880859375,
-0.07470703125,
-... | 5,291 | 5291 | |
The German Tank Problem Revisited
I've written before about
The German Tank Problem
. Basically, it's a problem in which you try and estimate the number of tanks being produced by the enemy, based upon the serial numbers of the ones that were knocked out. This was a
real problem
from World War II, but is now often ... | 4 | [
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0.052734375,
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... | 5,292 | 5292 | |
prove: restriction of an operator to invariant subspace is diagolizable?
October 8th 2011, 11:38 AM
skybluesea2010
prove: restriction of an operator to invariant subspace is diagolizable?
Hi all,
Can you guys help me out with solving the following problems.
Here is the problem 1 that I wanted to prove:... | 4 | [
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0.... | 5,293 | 5293 | |
Need help with this differential equations please
May 8th 2013, 05:46 AM
Sunex
Need help with this differential equations please
Obtain the general solution of the differential equations by using the method of undetermined coefficients
y''' - 2y'' + 3y' - 5y = 5sin2x + 10x^2 - 3x - 7
y''' + y' - 5y = 4si... | 5 | [
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... | 5,294 | 5294 | |
The Research Kitchen
The Euler Method is a very simple method used for numerical solution of initial-value problems. Although there are much better methods in practise, it is a nice intuitive mechanism.
The objective is to find a solution to the equation
$$ \frac{dy}{dt} = f(t,y) $$
over a grid of points (equally sp... | 5 | [
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0.01953125,
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-0.053955078125,
-0.05419921875,
-0.0559082... | 5,295 | 5295 | |
Equivalence Classes
July 21st 2011, 11:26 AM #1
Member
Joined
Jul 2011
Posts
80
Equivalence Classes
How do you find the distinct equivalence classes of R?
A = {-4, -3, -2, -1, 0, 1, 2, 3, 4, 5}. R is defined on A as follows:
For all x, y elements of A, x R y <=> 3|(x-y).
I have the answer, ... | 4 | [
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0.083984375,
-0.10... | 5,296 | 5296 | |
PYTHAGOREAN THEOREM IN DAILY LIFE
Good morning all, my name is Nanda Putri Amalia from the International class of Mathematics Education.
Let me explain to you about the Pythagorean Theorem in daily life.
Open the Marsigits book page 153, look at the exercise.
1. The recommended distance to watch the television is 6... | 4 | [
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-0.05395507812... | 5,297 | 5297 | |
Trigonometry
May 27th 2006, 04:15 PM #1
Chuyin
Guest
Trigonometry
You are the captain of a yacht, the Beauty . A sudden storm rises and when it passes, you are far off the course. You radio for help, two lighthouses reply. Point Avery reports that your
direction is 138.44 degrees (north is 0 degrees) and the ... | 4 | [
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-0.0751953125... | 5,298 | 5298 | |
Math Help
April 10th 2007, 12:35 PM #1
Member
Joined
Oct 2006
Posts
88
slope
i have to find the slope of the tangent line at theta = pi/2 of the graph r=2 + 2cos(theta).
i did the x=rcos(Theta) and y=rsin(theta) thing then the dx/d(theta) dy/d(theta) thing, then dy/dx
i ended up with 4cos^2(th... | 5 | [
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0.052490... | 5,299 | 5299 |