content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Eigenvalues and Eigenvectors
April 1st 2010, 08:47 PM
mybrohshi5
Eigenvalues and Eigenvectors
Given that $V_1 = \begin{bmatrix}3\\1\end{bmatrix}\: and\: \: V_2 = \begin{bmatrix}8\\3\end{bmatrix}$ are Eigenvectors of the matrix
$A = \begin{bmatrix}-21&48\\-6&13\end{bmatrix}$
Find the Eigenvalues
I... | 4 | [
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Unicity of Meromorphic Function Sharing One Small Function with Its Derivative
International Journal of Mathematics and Mathematical Sciences
Volume 2010 (2010), Article ID 507454, 11 pages
http://dx.doi.org/10.1155/2010/507454
Research Article
Unicity of Meromorphic Function Sharing One Small Function with Its Deriv... | 5 | [
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[SOLVED] Hyperbola 3
April 16th 2010, 05:06 PM #1
Junior Member
Joined
Apr 2010
Posts
29
[SOLVED] Hyperbola 3
Hello.
Prove that the locus of midpoints of parallel chords of xy = c^2 is a diameter.
Is anyone able to give me some hints on how to do this question?
Hello UltraGirl
Consider... | 4 | [
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0.0... | 20,802 | 20802 | |
Simple derivative
June 26th 2013, 11:54 PM #1
Newbie
Joined
Jul 2012
From
unknown
Posts
21
Simple derivative
Hi I need to find the derivative of $\frac{1}{\sqrt{1-x^2}}$.I found it as:
$\frac{d}{dx} (\frac{1}{\sqrt{x^{2}-1}})ewline$
$\frac{d}{dx} (x^{2}-1)^{-\frac{1}{2}}=-\frac{1}{2}(x^{2}-1)... | 5 | [
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volume of a sphere
Author Message
TAGS:
volume of a sphere [#permalink] 07 Oct 2009, 19:53
00:00
B
C
... | 4 | [
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My first attempt at proofs, from Understanding Analysis
February 18th 2011, 10:17 PM
drgonzo
My first attempt at proofs, from Understanding Analysis
Hey all,
This is my first attempt at any sort of a proof in mathematics. I'm reading through the book 'understanding Analysis' by Abbott. Can you take a look a... | 5 | [
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tangent lines
September 27th 2007, 10:42 PM #1
Banned
Joined
Aug 2007
Posts
52
tangent lines
For what values of a and b are y = a b^x and y = 1 + x tangent at x = 0.
how do i start this one??
Let f(x) = y = a*b^x -------------(i)
And g(x) = y = 1 +x
If f(x) and g(x) are tangent at x=0,... | 4 | [
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Solve using the Chinese Remainder Theorem
June 15th 2013, 03:27 PM #1
Junior Member
Joined
Feb 2013
From
Charlotte, NC
Posts
50
Solve using the Chinese Remainder Theorem
An old woman goes to market and a horse steps on her basket and crashes the eggs. The rider offers to pay for the damages and asks ... | 5 | [
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How to find the time for a curved path ?
Sdtootle
The only acceleration is due to gravity when the car is going down the ramp.. As soon as it is on the straight section, the velocity is constant (no acceleration)
This is for Path AD
i used the equation
a^2 = b^2 + c^2
To find the distance from A TO D
like this
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Patent US6781681 - System and method for wavefront measurement
FIELD OF THE INVENTION
The present invention relates generally to systems and methods for measuring phase characteristics of electromagnetic wavefronts.
BACKGROUND
Measuring how a wavefront deviates from perfectly diffraction-limited has many application... | 4 | [
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Trigonometry/Power Series for Cosine and Sine
Applying Maclaurin's theorem to the cosine and sine functions, we get
$\displaystyle \cos(x) = 1 - {x^{2} \over 2!} + {x^{4} \over 4!} - \cdots = \sum_{n=0}^{\infty} \frac{(-1)^nx^{2n}}{(2n)!}$
$\sin(x) = x - {x^{3} \over 3!} + {x^{5} \over 5!} - \cdots = \sum_{n=... | 4 | [
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Triple integrals
The "innermost" integral will be with respect to z (dz) and will have limits z= 0 to z= 6- 2x- 3y.
"projecting" down to the x,y plane (z= 0) gives the line where the plane 2x+ 3y+ z= 6 crosses the x,y plane: 2x+ 3y= 6. We need to integrate over the triangle with edges x=0, y=0, 2x+ 3y= 6.
Solving for... | 4 | [
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... | 20,811 | 20811 | |
Need helping setting up equation to this problem
October 29th 2012, 01:45 PM #1
Junior Member
Joined
Dec 2009
Posts
30
Need helping setting up equation to this problem
A farmer wants to enclose a rectangular field by a fence and divide it into two smaller rectangular fields by constructing another fence ... | 4 | [
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Di
Sort by:
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Now showing results 41-50 of 79
In this problem set, learners will analyze the Keeling Curve showing carbon dioxide concentration in the atmosphere since 1985 to answer a series of questions. Answer key is provided. This is part of
Earth Math: A Brief Mathematical Guide to Earth... (View More)... | 4 | [
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Positive Solutions for Nonlinear Differential Equations with Periodic Boundary Condition
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 528719, 13 pages
http://dx.doi.org/10.1155/2012/528719
Research Article
Positive Solutions for Nonlinear Differential Equations with Periodic Boundary Condition
^1Col... | 5 | [
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Patent US20020013797 - Apparatus and method for modifying an M-sequence with arbitrary phase shift
[0001] This application claims priority to the provisional patent application entitled, “Apparatus and Method for Augmenting an M-sequence with Arbitrary Phase Shift,” Ser. No. 60/178,817, filed Jan.
28, 2000.
BRIEF DESC... | 4 | [
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Patent US5247587 - Peak data extracting device and a rotary motion recurrence formula computing device
This is a continuation of co-pending application Ser. No. 381,106, filed Jul. 17, 1989, and now abandoned.
BACKGROUND OF THE ART
1. Technical Field of the Invention
This invention relates to a peak data extracting ... | 4 | [
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Urgent: Differential equation.
February 6th 2008, 12:35 PM #1
Newbie
Joined
Feb 2008
Posts
4
Can anyone give me any pointers with this differential equation.
I seriously have no clue what I am doing with it (More detail the better
Find the particular solution of:
x^3 dy/dx = y^3 - 3yx^2 , y(... | 5 | [
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Centre of an arc
February 18th 2006, 02:43 AM
ragsk
Centre of an arc?
Can ne 1 help me how to find the centre (Xc,Yc) for an arc having end points A(x1,y1)[say (2,5)] and B(x2,y2)[say (6,2)]?.........
I tried to calculate the centre imagining those end points of an arc as the end points of the diagonal of ... | 4 | [
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Images formed by mirrors
The purpose of most optical instruments is to produce an image. Images can be formed by reflection and refraction.
What is an image?
We see objects, because they either emit or reflect light. We visually identify objects by the pattern of light that they emit or reflect. We gather some portio... | 4 | [
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Dynamic Crack Propagation Problems of Fibre-Reinforced Concrete
Advances in Civil Engineering
Volume 2012 (2012), Article ID 971472, 10 pages
http://dx.doi.org/10.1155/2012/971472
Research Article
Dynamic Crack Propagation Problems of Fibre-Reinforced Concrete
^1School of Resources & Civil Engineering, Northeastern ... | 4 | [
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Existence of Oscillatory Solutions of Singular Nonlinear Differential Equations
Abstract and Applied Analysis
VolumeΒ 2011Β (2011), Article IDΒ 408525, 20 pages
http://dx.doi.org/10.1155/2011/408525
Research Article
Existence of Oscillatory Solutions of Singular Nonlinear Differential Equations
Department of Mathema... | 5 | [
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How to prove that root n is irrational, if n is not a perfect square. Also, if n is a
VietDao29
Can you show us what you tried, so that we may know where you got stuck, and help you? It's against the forums' policies to provide help, unless you show us that you did put some efforts in solving
the problem. So, just g... | 4 | [
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Several simple exponent problems, Please help.
September 23rd 2012, 01:19 PM #1
Junior Member
Joined
Sep 2012
From
Trinidad
Posts
49
Several simple exponent problems, Please help.
Hi, I am new to the forum. I have been stuck on a few math problems involving exponents for a while now and i don't know ... | 4 | [
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Strange equation
September 21st 2005, 09:58 AM #1
Newbie
Joined
Sep 2005
Posts
2
Strange equation
I have come across this equation in a puzzle and I don't even know what it is, never mind the answer. Can any one help me, please?
Here it is: -
sum = 0
Do n = 123 To 321 Step 3
sum = sum + ... | 4 | [
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Nonlinear Dynamic Model-Based Adaptive Control of a Solenoid-Valve System
Journal of Control Science and Engineering
Volume 2012 (2012), Article ID 846458, 13 pages
http://dx.doi.org/10.1155/2012/846458
Research Article
Nonlinear Dynamic Model-Based Adaptive Control of a Solenoid-Valve System
Department of Mechanica... | 4 | [
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Patent US6678844 - System and method for determining bit-error rates
The present application claims the benefit under 35 USC §119(e) of copending provisional application No. 60/171,854, filed Dec. 22, 1999. This application is also related to copending U.S. patent
application Ser. No. 09/591,026, which is hereby incorp... | 4 | [
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Squeeze Theorem
How would I use the squeeze theorem to evaluate for: $lim_{n\to\infty}\{\frac{1}{\sqrt{n^2+1}} + \frac{1}{\sqrt{n^2+2}} + ... + \frac{1}{\sqrt{n^2 + n}} \}$
$\frac{n}<br /> {{\sqrt {n^2 + n} }} \leqslant \sum\limits_{k = 1}^n {\frac{1}<br /> {{\sqrt {n^2 + k} }}} \leqslant \frac{n}<br /> {{\sqrt {n^2 +... | 5 | [
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0.0673828125,
-0.0732421875,
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-0.01... | 20,827 | 20827 | |
The
The Dome: A Simple Violation of Determinism in Newtonian Mechanics
John D. Norton
Department of History and Philosophy of Science, University of Pittsburgh
Pittsburgh PA 15260. Homepage: www.pitt.edu/~jdnorton
This page is available at www.pitt.edu/~jdnorton/goodies
This page is based on Section 3 "Acausality in... | 4 | [
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Math Help
August 23rd 2012, 10:36 AM #1
Newbie
Joined
Aug 2012
From
Brasilia
Posts
5
Unit
Hello Forum! I have the following problem, which is related to the ring of quaternions, I tried but I had no luck in making it, I hope I can help:
Let I be the ring of integers Hamilton quaternions and de... | 5 | [
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... | 20,829 | 20829 | |
number of real roots?
October 23rd 2006, 10:33 PM #1
Senior Member
Joined
Jul 2006
Posts
364
number of real roots?
The number of real solutions to $x^4 - x^3 = cosec^2(x) - cot^2(x)$ is?
-- ok, so i figured that cosec^2(x) = 1 + cot^2(x), so that brings it to
$x^4 - x^3 = 1$ if i am right?
... | 4 | [
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help pls and hurry my test is tomorrow quadratic
December 7th 2006, 10:33 AM #1
Newbie
Joined
Dec 2006
Posts
4
help pls and hurry my test is tomorrow quadratic
help pls and hurry my test is tomorrow,
im having issues with solving quadratic equations (paralobas)
the problem is x^-2x-8=0 i have ... | 4 | [
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... | 20,831 | 20831 | |
Patent US4754421 - Multiple precision multiplication device
BACKGROUND AND SUMMARY OF THE INVENTION
The present invention relates generally to computing devices, and more specifically to a single chip high-speed multiplication device.
High speed multiplication of binary numbers generally involves the use of an array ... | 4 | [
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Physics Forums - View Single Post - Supersonic ping pong ball cannon
Video:
http://www.youtube.com/watch?v=I9zBGgpzl0I
Description:
http://arxiv.org/ftp/arxiv/papers/1301/1301.5188.pdf
So I though I would do a back-of-envelope check if that was even possible. I decided to model that as adiabatic expansion from the... | 5 | [
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TI-83 Plus... Primes
July 14th 2008, 07:07 PM #1
Junior Member
Joined
Jun 2008
Posts
27
TI-83 Plus... Primes
Hey guys,
I heard some of the other TI calculators can check whether a number is prime, and if it's not, give the prime factorization for that number. I don't know more than that, I only know... | 4 | [
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geometry test
November 26th 2008, 06:29 PM #1
Junior Member
Joined
Apr 2008
Posts
25
hello i have a major test in a couple of days and i want to go over some geometry.
q1) how far apart are Adelaide 35S, 139E and Tokyo 36N, 139E?
answer in Naautical miles.
add the latitute so 35S plus 36 N=71
... | 5 | [
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Dirac Notation, Observables, and Eigenvalues, OH MY!
cosmic dust
I’m having a problem with my tex, so I will outline what you have to do in order to prove it.
Problem solved! Let me show you what I mean. Consider the eigen-values equation for operator the A: [tex]A{{\psi }_{n}}={{a}_{n}}{{\psi }_{n}}[/tex]
Assumin... | 4 | [
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Calculating autocorrelation function
PhilDSP
Because of the local nature of the data in the windows used with the FFT or DFT, periodicity of the original data is neither assumed nor implied. The values of either the original data or the
extension of the Fourier series outside of each data window at each iteration ar... | 4 | [
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On Thermodynamics of Charged and Rotating Asymptotically AdS Black Strings
Advances in High Energy Physics
Volume 2013 (2013), Article ID 371084, 7 pages
http://dx.doi.org/10.1155/2013/371084
Research Article
On Thermodynamics of Charged and Rotating Asymptotically AdS Black Strings
^1Institute of Theoretical Physic... | 4 | [
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Patent US5300930 - Binary encoding method with substantially uniform rate of changing of the binary elements and corresponding method of incrementation and decrementation
BACKGROUND OF THE INVENTION
1. Field of the Invention
The field of the invention is that of binary encoding, namely the representation of data of a... | 4 | [
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Patent US7046811 - Stereo demultiplexer
BACKGROUND OF THE INVENTION
(1) Field of the Invention
The present invention relates to a method and a device to demultiplex a frequency modulated stereo-multiplex signal, in particular to an improvement of the signal to noise ratio of a transmitted
audio signal.
(2) Descripti... | 4 | [
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Patent US7110383 - Single user detection
This application claims priority to U.S. Provisional Patent Application No. 60/246,947, filed on Nov. 9, 2000.
BACKGROUND
The invention generally relates to wireless communication systems. In particular, the invention relates to data detection in a wireless communication syste... | 4 | [
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Domain/Function Notation/Symmetry...
November 12th 2009, 05:24 PM
anni88
Domain/Function Notation/Symmetry...
Please help! I hit a snag while attempting these, and will try to explain why, but it might just be easier to compare my answer to others. And I dont know how to do symbols so I will try to
explain i... | 4 | [
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Another Surface Area question
April 17th 2008, 07:12 PM #1
Newbie
Joined
Feb 2008
Posts
6
Another Surface Area question
we have $z=1+3x+2y^2$ and I am to find the part of the surface that lies above a triangle with vertices at (0,0),(0,1),(2,1).
So far:
$dS=\sqrt{1+(\frac{dz}{dx})^2+(\frac{dz}{dy... | 4 | [
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A Proton is orbiting a metal ball
1. The problem statement, all variables and given/known data
A proton orbits a 1.0-cm-diameter metal ball 1.90 mm above the surface. The orbital period is 1.50 [tex]\mu s[/tex].
What is the charge on the ball?
2. Relevant equations
[tex]F_{cp} = \frac{m v^2}{r}[/tex]
[tex]F_c = \f... | 4 | [
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0... | 20,844 | 20844 | |
Prove Orthogonality Condition For Sines (Integral)
aargghh why haven't you posted the solution
EDIT: nevermind, I found it here:
http://www.mathreference.com/la-xf-four,orth.html
and I'm copying it below for reference:
Consider two functions f = sin(mx) and g = sin(nx). Here m and n are distinct positive integers. ... | 4 | [
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Patent US5987138 - Identification and/or signature process
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority from French Application No. 9604406 filed Apr. 9, 1996.
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to an identification and/or signature process.
... | 4 | [
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-0... | 20,846 | 20846 | |
Arithmetic Tutorial
3.2 Arithmetic Tutorial
In this section, we explore the arithmetic and scientific functions available in the Calculator.
The standard arithmetic commands are +, -, *, /, and ^. Each normally takes two numbers from the top of the stack and pushes back a result. The n and & keys perform change-sign ... | 5 | [
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-0.1093... | 20,847 | 20847 | |
Triangle find angles
November 29th 2006, 09:42 AM
qbkr21
Triangle find angles
If $a=7$, $b=4$, $c=9$; Find the angles A, B and C. Give your answer in degrees to at least 3 decimal places.
A=?
B=?
C=?
November 29th 2006, 10:23 AM
Soroban
Hello, qbkr21!
Given three sides of a triangle, you... | 4 | [
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... | 20,848 | 20848 | |
SAT Math Counting Problem
September 3rd 2010, 10:09 PM #1
Newbie
Joined
Sep 2010
Posts
3
SAT Math Counting Problem
John went to dinner and had a bill of 2010 dollars. He only has 1,2,5, and 10 dollar bills. How many different ways can he pay for dinner.
Here is one way.
How many ways can we spe... | 4 | [
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... | 20,849 | 20849 | |
Geography problem
August 10th 2011, 06:14 AM
explodingtoenails
Geography problem
The latitude of Jackson, Mississippi is 32degrees17minutes N, and the latitude of St. Louis, Missouri, is 38degrees37minutes N. The radius of Earth is about 4000 miles.
a) About how far apart are the two cities?
b) If Eart... | 4 | [
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... | 20,850 | 20850 | |
Particular integral, Matrix method
April 29th 2010, 07:06 AM #1
Junior Member
Joined
Jan 2009
Posts
69
Particular integral, Matrix method
Hi
I have found the complementary function but I am not sure how to work out the particluar integral. Here are the equations
$<br /> \dot{x}=3x+8y-2t <br />$... | 4 | [
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0.10302734375,
-0.0471... | 20,851 | 20851 | |
find the area shaded by the circles
January 19th 2010, 02:33 PM #1
Junior Member
Joined
Jan 2009
Posts
71
find the area shaded by the circles
find the area shared by the circles r=2cos(theta) and r=2sin(theta).
i know the general formula for finding the area, but i don't know which is the outside on... | 5 | [
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0.0289306640625,
-0.0... | 20,852 | 20852 | |
Hot Topic Propagation Model and Opinion Leader Identifying Model in Microblog Network
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 893961, 13 pages
http://dx.doi.org/10.1155/2013/893961
Research Article
Hot Topic Propagation Model and Opinion Leader Identifying Model in Microblog Network
School of In... | 4 | [
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Patent US4525797 - N-bit carry select adder circuit having only one full adder per bit
Technical Field
This invention relates generally to computer arithmetic and, more particularly, to arithmetic circuits performing carry select addition.
BACKGROUND ART
Arithmetic logic units (ALUs) having n-bits, where n is an int... | 4 | [
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Patent US6826723 - Multi-rate reed-solomon encoders
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to Reed-Solomon encoders. More particularly, it relates to a Multi-Rate Reed-Solomon encoder.
2. Background
Reed-Solomon codes are block-based error correcting codes with a wide... | 4 | [
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-0.0194091796875,
-0.00616455078125,
-0.072265625,
0.06... | 20,855 | 20855 | |
Patente US20020103559 - Systems and methods for optimizing a production facility
TECHNICAL FIELD
[0001] The present invention relates generally to optimization, and relates specifically to optimization of print shop facilities.
BACKGROUND OF THE INVENTION
[0002] Production facilities are frequently faced with proble... | 5 | [
-0.068359375,
0.024169921875,
-0.06982421875,
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0.0224609375,
0.00340270... | 20,856 | 20856 | |
Help with proving limits using Epsilon-Delta definition
shirewolfe
I am having trouble proving the limits of quadratic functions such as the following. (I used "E" to represent epsilon and "d" for delta)
lim [(x^2)+1]
x->1
I found the limit, L, to equal 2 and have proceeded through the following steps:
First of all... | 5 | [
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0.038330078125,
-0.02160... | 20,857 | 20857 | |
2 Questions
May 23rd 2007, 07:12 PM #1
2 Questions
These two questions are ones that I am just stuck on...
#1. I found that
f(x) = -5x
but I need some help finding what
a = ?
Thanks for the help!
-qbkr21
Re:
#2.
Re:
#2 (continued)...
Re:
#2 (continued)...
#2.... | 5 | [
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0.017578125,
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0.056396484375,
0.04638671875,
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... | 20,858 | 20858 | |
Direction derivative of Ricci scalar w.r.t. killing field
Register to reply
by WannabeNewton
Tags: derivative, direction, field, killing, ricci, scalar
C. Spirit 1. The problem statement, all variables and given/known data
... | 4 | [
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-0.0625,
0.04150390625,
-0.0581... | 20,859 | 20859 | |
Confused - Radical Expression
May 15th 2010, 12:42 PM #1
Newbie
Joined
Nov 2009
From
California, United States
Posts
21
Confused - Radical Expression
Hello, everybody :]
I'm a little confused as to the solution of a radical expression. My goal is to simplify it as much as I can. Here is the expr... | 4 | [
0.0224609375,
-0.0303955078125,
-0.0240478515625,
0.01373291015625,
-0.03955078125,
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0.00909423828125,
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0.03125,
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0.00113677978515625,
0.10302734375,
0.054931640625,
0.177734375,
-0.054443359375,
0.02... | 20,860 | 20860 | |
Maths method 11 Linear equation problem solving
June 28th 2008, 03:30 AM #1
Maths method 11 Linear equation problem solving
Hello I've received holiday homework from my text book and i cant seem to work ou these questions. anyone know the working outs?i saw the answer from the back of the book but i don't just wa... | 4 | [
0.0306396484375,
0.07177734375,
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0.0042724609375,
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0.061767578125,
0.03369140625,
-0.00927734375,
0.033935546875,
-0.11865234375,
0.004608154296... | 20,861 | 20861 | |
Patent US5774835 - Method and apparatus of postfiltering using a first spectrum parameter of an encoded sound signal and a second spectrum parameter of a lesser degree than the first spectrum parameter
BACKGROUND OF THE INVENTION
This invention relates to a postfilter and, more particularly, to the one used for reprod... | 4 | [
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0.0133056640625,
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0.09716796875,
0.068359375,
-0... | 20,862 | 20862 | |
Converting Sigma notation...
Pranav-Arora
Like the binomial expansion can be written to (a+b)^n, i want to write the given expression in the form as we compress the sigma notation to (a+b)^n.
(Would you please tell me how to make the "n" before "C" in Superscript?)
I hope you get it now.
Oh ok I see, well then sin... | 4 | [
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0.08251953125,
-0.00... | 20,863 | 20863 | |
Number of choices
October 11th 2013, 08:42 PM #1
Member
Joined
Oct 2009
Posts
82
Number of choices
This one is from Hogg & Tanis, 1.3-21.
A manufacturer makes storage files, which are made up of a top, a base, and up to six storage modules. There are four bases to choose from and two tops, and the s... | 4 | [
0.033203125,
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0.00042724609375,
0.1015625,
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0.040771484375,
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0.03466796875,
0.08935546875,
-0.023193359375,
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0.0576171875,
-0.11669921875,
-0.03808... | 20,864 | 20864 | |
Distance problems
December 22nd 2010, 10:58 AM #1
Junior Member
Joined
Dec 2010
Posts
30
Distance problems
Hello,
These are some SAT prep problems that I'm not sure about...
How long would a 1000 mile trip take if I was traveling at 50 mph for the first 500 miles and 60 mph for the rest of the ... | 4 | [
0.005157470703125,
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0.052001953125,
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0.04736328125,
-0.047851... | 20,865 | 20865 | |
[SOLVED] Partial fractions integral
July 19th 2008, 01:39 PM #1
[SOLVED] Partial fractions integral
I'm betting I have to solve it using partial fractions : $\int \frac{2x^3+3x^2+2x+4}{(x^2+1)^2}dx$. So I found $A$, $B$, $C$ and $D$ and I reached to that the solution must be equal to $\int \
frac{2x+3}{x^2+1}... | 5 | [
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0.009033203125,
-0.07568359375,
0.01483154296875,
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0.033935546875,
-0.051513671875,
0.0096435546875,
0.0673828125,
... | 20,866 | 20866 | |
Math Help
I have 2 hexagons with a ratio of similarity of 3/4. If I have 3a+b and a+2b, what is a/b?
3a+b is on one hexagon and a+2b is on the other
since you neglected to give the diagram, i will assume that the relationship is meant to be: $(3a + b) \mbox { : } (a + 2b) = 3:4$ $\Rightarrow \frac {3a + b}{a + 2b} =... | 4 | [
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0.01092529296875,
0.0022735595703125,
-0.0274658203125,
0.052490234... | 20,867 | 20867 | |
Any ideas on how to show this?
February 28th 2009, 09:14 AM
KZA459
Any ideas on how to show this?
f is continuous and
$<br /> f:[a,b] \rightarrow ]0,\infty[<br />$
Show that the supremum of f(x) on [a,b] equals
sup f(x) = lim{n->infinity} (1/(b-a) * int[(f(x))^n])^1/n
The integral is from a to... | 4 | [
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-0.08691406... | 20,868 | 20868 | |
Moment Generating function
April 25th 2011, 08:14 AM #1
Junior Member
Joined
Dec 2008
Posts
70
Moment Generating function
Hi,
I'm just need to work out a step taken in the answer to the following question:
A random variable U has the uniform distribution on the range (0, 1). Find the moment
... | 5 | [
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0.0194091796875,
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-0... | 20,869 | 20869 | |
Using quotient and chain rules for derivatives
September 30th 2009, 10:10 PM
commerce-calc
Using quotient and chain rules for derivatives
Hey so I have a calculus assignment and im not wrapping my head around many of the concepts for derivatives.
My quotient rule question:
a) Use the definition of the ... | 5 | [
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0.00579833984375,
0.080078125,
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0.021484375,... | 20,870 | 20870 | |
In a triangle ABC, value of angle C?
July 31st 2008, 05:12 AM #1
In a triangle ABC, value of angle C?
In a triangle ABC, a = 2, b = 3 and tan A = √(3/5) then the value(s) of C are:
A)√(10)
B){√(10)}/2
C){3√(10)}/2
D){√(10)}/3
Did you mean get the value(s) of c? If your notation is to be cons... | 4 | [
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-0.049560546875,
0.08056... | 20,871 | 20871 | |
Ancient mathematics
February 27th 2009, 02:17 PM #1
Junior Member
Joined
Sep 2008
Posts
44
Ancient mathematics
Hello everyone,
Could someone please help me on this ancient mathematics problem?
Solve by the method of your choice: 1-third of a school of fish and 3 times the square root of the rem... | 4 | [
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0.0242919921875,
... | 20,872 | 20872 | |
Find, in terms of k... [Arithmetic series]
May 5th 2009, 02:55 AM #1
Find, in terms of k... [Arithmetic series]
The first term of an arithmetic series is (5+3k) where k is a positive integer. The last term is 17(1+k) and the common difference is 2. Find, in terms of k,
(i) the number of terms,
(ii) the s... | 4 | [
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0.004730224609375,
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-... | 20,873 | 20873 | |
Patent US6563928 - Strengthened public key protocol
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation of U.S. patent application Ser. No. 08/649,308 filed on May 17, 1996, now issued as U.S. Pat. No. 5,933,504.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relat... | 4 | [
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0.0644... | 20,874 | 20874 | |
The Use of Phase Lag and Amplification Error Derivatives for the Construction of a Modified Runge-Kutta-Nyström Method
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 910624, 11 pages
http://dx.doi.org/10.1155/2013/910624
Research Article
The Use of Phase Lag and Amplification Error Derivatives for the C... | 5 | [
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0.02... | 20,875 | 20875 | |
Antiderivative Example
November 8th 2009, 11:39 AM #1
Junior Member
Joined
Nov 2006
Posts
38
Antiderivative Example
Hello,
I was doing the antiderivative of:
f'(x) = (x^2-1)/x
Am I allowed to separate this into x^2/x - 1/x? Or do the brackets prevent me from doing so?
If not, how do I ... | 4 | [
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0.04150390625,
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0.0186767578125,
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0.03173828125,
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0.03564453125,
-0.1240234375... | 20,876 | 20876 | |
[Haskell] Typeful symbolic differentiation of compiled functions
oleg at pobox.com oleg at pobox.com
Wed Nov 24 04:05:12 EST 2004
Jacques Carette wrote on LtU on Wed, 11/24/2004
] One quick (cryptic) example: the same difficulties in being able to
] express partial evaluation in a typed setting occurs in a CAS
] [co... | 5 | [
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-0.0147705078125,
... | 20,877 | 20877 | |
derivative of an integral
April 17th 2008, 07:05 AM
DINOCALC09
derivative of an integral
d/dx of the integral from 0 --> x^2 of sin^2t * dt
can you guys understand that. i don't know how to do that fancy synthax.
and the question i have about this was whether there was some kind of trick to this proble... | 5 | [
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0.044189453125,
0.002578735351562... | 20,878 | 20878 | |
Physics Forums - Why does a^x = e^(x(lna))
-
General Math
(
http://www.physicsforums.com/forumdisplay.php?f=73
)
jessepye Apr4-12 01:25 PM
Why does a^x = e^(x(lna))
Hi every one, first post, so let me know if I'm not following any of the rules.
I'm studying Calculus, looking at the rules for deriving the f... | 5 | [
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0.0152587890625... | 20,879 | 20879 | |
Using the force constant in equations
Baez posted some facts about Titan on SPR today including at what altitude the atmosphere was coldest----in natural units terms it was
surface temp 3.33E-30
lowest temp 2.48E-30 (at altitude 6.2E38)
let's look at the indicated gradient 0.85E-30/6.2E38 =1.4E-69
this was for a ma... | 4 | [
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-0.0185546875,
-0.0104370117... | 20,880 | 20880 | |
Find a number
July 18th 2006, 01:30 AM #1
Newbie
Joined
Jul 2006
Posts
10
urgent!! please help~~~~
When a positive integer N is written in base 6 , it is a four digit number such that all its four digits are the same. When N is written in base ten, it is a three digit number such that all its
three d... | 4 | [
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0.0084228515625,
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0.1064... | 20,881 | 20881 | |
European Option Pricing with Transaction Costs in Lévy Jump Environment
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 513496, 6 pages
http://dx.doi.org/10.1155/2014/513496
Research Article
European Option Pricing with Transaction Costs in Lévy Jump Environment
^1School of Science, Donghua University, ... | 5 | [
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0.125,
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-0.07275390625,
-0.... | 20,882 | 20882 | |
The Strong Convergence of Prediction-Correction and Relaxed Hybrid Steepest-Descent Method for Variational Inequalities
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 515902, 10 pages
http://dx.doi.org/10.1155/2013/515902
Research Article
The Strong Convergence of Prediction-Correction and Relaxed Hybri... | 5 | [
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Convergence and Divergence
March 6th 2010, 06:26 PM #1
Junior Member
Joined
Dec 2008
Posts
33
Convergence and Divergence
Show that the series ((ln n)^q)/n^p from n = 1 to infinity converges if p>1 where q is any real number.
I said that
((ln n)^q)/n^p = ((ln n)^q)/n X 1/(n^(p-1)) < 1/n^(p-1)
... | 5 | [
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How does GR handle metric transition for a spherical mass shell?
At the risk of hijacking the thread (which seems hopelessly confused anyway), I do have a specific problem along the lines of boundary conditions - one I think I solved correctly, that I presented
earlier. I think there was some questions raised about it,... | 4 | [
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Combinatorics Problem; Due Friday...
January 16th 2008, 03:42 PM #1
Newbie
Joined
Jan 2008
Posts
4
Combinatorics Problem; Due Friday...
I just can't seem to get this problem, and time is running out.
The problems on this page all deal with hands taken from a deck of 32 cards:
the 7, 8, ... , Q, ... | 4 | [
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Patente US5737345 - Method for arithmetic decoding
BACKGROUND INFORMATION
U.S. Pat. No. 5,025,258 describes a method for arithmetic decoding, in which there is a change in the distribution density function of the transmitted data during transmission. For this purpose, an
adaptive probability estimate, that is to say a... | 4 | [
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Math Help
November 15th 2011, 12:14 PM #1
Mod 2011
Hi guys, I'm new at number theory. So, Could you help with the following congruence equation.
$x^2+x+1676 \equiv 0 \mod 2011$
Regards!
Re: Mod 2011
I think that this equation has no solutions. I started by writing it as $x^2 + x - 335\equiv0\pm... | 5 | [
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Limits on graphs (epsilon, thelta).
Last edited by FullBox; September 20th 2010 at 05:03 PM. Reason: I solved the first problem, so I removed it.
I managed to solve the first problem, which I removed from the first post for neatness/lack of clunkiness. I also made progress on the second problem, though I'm not sure if... | 4 | [
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Subtracting from a negative fraction. (Signs in cross multiplication)
February 23rd 2011, 01:27 AM
alyosha2
Subtracting from a negative fraction. (Signs in cross multiplication)
$-1 - \frac{1}{3}$
$- \frac{1 * 3}{1 * 3} - \frac{1}{3} = - \frac{3}{3} - \frac{1}{3} = - \frac{-3 - 1}{3} = - \frac{-4}{3} = ??$
... | 4 | [
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Projectile Motion- Fixed initial velocity show the particle cant move beyond a curve
December 29th 2009, 04:00 AM #1
Junior Member
Joined
Aug 2009
Posts
36
Projectile Motion- Fixed initial velocity show the particle cant move beyond a curve
A boy throws a ball at a constant speed V for every throw, show ... | 5 | [
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Conjugacy class
October 19th 2009, 12:03 AM #1
Member
Joined
Nov 2008
Posts
76
Conjugacy class
I'm stuck on this problem. Hope someone can give me help.
Let H be a normal subgroup of G, show that if $x \in H$ then $ord(x^H)=ord(x^G)$ or $ord(x^H)=\frac{1}{2}ord(x^G)$
I think I need to construct a... | 5 | [
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Parametric equations to rectangular equations.
April 5th 2009, 09:23 PM #1
Parametric equations to rectangular equations.
I know how to change a rectangular equation into a parametric one but can't do it vice versa.
An example is: (x+2)^2/25-(y-5)^2/12=1
I'm flabbergasted!
Hello cheet0face
Ther... | 4 | [
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Patent US6269172 - Method for tracking the motion of a 3-D figure
FIELD OF THE INVENTION
This invention relates generally to motion tracking systems, and more particularly to tracking the motion of 3-D figures.
BACKGROUND OF THE INVENTION
There are many applications in computer graphics, athletic performance analysi... | 4 | [
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Patent US6609140 - Methods and apparatus for fast fourier transforms
RELATED APPLICATIONS
This application claims priority from U.S. Patent Application Serial No. 60/168,027, filed Nov. 30, 1999, and No. 60/192,639, filed Mar. 27, 2000, both of which are hereby incorporated by reference.
BACKGROUND
Fast Fourier tran... | 4 | [
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Patent US20060052991 - Method for creating a non-linear, stationary or dynamic model of a control variable of a machine
The invention relates to a method for creating a non-linear, stationary or dynamic model of a control variable of a machine, in particular of a combustion engine or of a partial system thereof,
prefer... | 4 | [
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area and volume bounded by y axis
March 25th 2009, 04:07 PM
frog09
area and volume bounded by y axis
Let area A be the region bounded by y=(2^x)-1, y=-2x+3, and the y axis.
a) find the exact value for the area of region A.
b) set up, but DONT integrate, an integral expression in terms of a signle varia... | 5 | [
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joint pmf
March 18th 2009, 10:27 AM
jojo_jojo
joint pmf
Let Joint pmf of X and Y be defined as f(x,y) = (x + y)/32 x=1,2, y=1,2,3,4
Find (i)P(X > Y) (ii)P(Y=2X) Thanks
March 18th 2009, 10:41 AM
Moo
Quote:
$P(X>Y)=P(X>Y,Y=1)+P(X>Y,Y=2)$$+P(X>Y,Y=3)+P(X>Y,Y=4)$
but since X=1 or 2, it is not po... | 5 | [
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How to solve for c and d?
October 30th 2009, 12:08 AM #1
Member
Joined
Apr 2008
Posts
123
How to solve for c and d?
Use the law N = c(t)^d
at t = 1, N = 1.7
at t = 2, N = 2.4
at t = 3, N = 2.9
at t = 4, N = 3.4
Solve for c and d.
I've been trying to do this for a while, but not... | 4 | [
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