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Finding this limit without l'Hospital's rule
October 24th 2009, 08:44 AM #1
Newbie
Joined
Oct 2009
From
New York City
Posts
9
Finding this limit without l'Hospital's rule
$<br /> \lim_{x\to0} \frac{1-cos(2x)}{x^2} <br />$
We haven't covered l'Hospital's rule yet so Wolfram Alpha's not all that h... | 5 | [
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Heisenberg-Robertson uncertainty relation vs. noise-disturbance measures
Finally I found the time to write my account on the interpretation of
the Heisenberg uncertainty principle vs. the question whether it can be
interpreted as Heisenberg did in his very first paper on the
subject. Although it is well known that t... | 4 | [
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Condition number of matrix after partial orthogonalization
up vote 13 down vote favorite
2
I'm wondering about which bounds one can put on the condition number of a $n\times n$ square matrix which is obtained from another $n\times n$ square matrix by orthogonalizing the first $m < n$
columns. Obviously, the condition ... | 4 | [
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An Ionospheric Es Layer Clutter Model and Suppression in HF Surfacewave Radar
International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 320645, 18 pages
http://dx.doi.org/10.1155/2013/320645
Research Article
An Ionospheric Es Layer Clutter Model and Suppression in HF Surfacewave Radar
Research... | 4 | [
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Physics Forums - View Single Post - 2nd order nonlinear differential equation
Well, I can't seem to find an error in my derivation and I can't decipher your writing, so I will assume the derivation I posted is correct. As someone already mentioned in this thread, it seems
impossible that the equation can be solved in ... | 5 | [
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Poynting Vector - Finding stored energy per unit length of a solenoid
1. The problem statement, all variables and given/known data
long solenoid of n turns per unit length is wound upon a cylindrical core of radius a
and relative permeability. The current I through the solenoid is increasing with time t at a
constant ... | 4 | [
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Math problem involving powers and smallest possible value
Author Message
TAGS:
Math problem involving powers and smallest possible value [#permalink] 24 Sep 2009, 09:53
... | 4 | [
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if f is continuous on [a,b]....
March 1st 2010, 02:00 AM #1
Member
Joined
Aug 2008
Posts
172
if f is continuous on [a,b]....
Prove that if f is continuous on [a,b] with $f(x) \geq 0 \ , \forall x \in [a,b]$ then there is $c \in [a,b] \ such \ that \ f(c)=[\frac{1}{b-a} \int_a^bf^2]$
This is fals... | 5 | [
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Trig factor formula proof help.
Register to reply
by tweety1234
Tags: factor, formula, proof, trig
P: 112 1. The problem statement, all variables and given/known data
I dont understand the example in ... | 4 | [
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Life on the lattice
First off, before I get to the substance of the post, let me welcome
Mark Trodden
to the physics blog world. He's part of the even more elite "Central New York physics" blog world.
This post is going to be an outline of how one computes a value for the strong coupling constant ($\alpha_{s}$) usin... | 4 | [
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Math Help
March 11th 2010, 02:28 AM #1
Senior Member
Joined
Jan 2009
Posts
381
matrix
Say i have a matrix ,
$\begin{bmatrix}{4}&{3}\\{-1}&{7}\end{bmatrix}+5$
is it correct if i do it this way ,
$\begin{bmatrix}{4}&{3}\\{-1}&{7}\end{bmatrix}+5\begin{bmatrix}{1}&{0}\\{0}& { 1}\end{bmatrix}$... | 4 | [
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Puttiing the cosine of a direction cosine in terms of Cartesian coordinates
June 22nd 2011, 12:26 PM #1
Puttiing the cosine of a direction cosine in terms of Cartesian coordinates
Here's the problem for what it is worth.
Diagram: Let there be a point charge of -q at the coordinates (x,y) = (a, 0), a point ch... | 5 | [
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Brevet US6366621 - Method of estimating pilot signal phase in a digitally modulated RF signal
BACKGROUND OF THE INVENTION
The present invention relates generally to a method of estimating the phase of an electrical signal and more specifically to estimating the phase of a pilot tone or sinusoid embedded in a wideband
... | 4 | [
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<Back
Verbal Arithmetic
Verbal arithmetic is a mathematic game, where letters stand in for numbers. The aim is to work out what number each letter stands for. Each letter represents a different digit, and the first digit of
a multi-digit number should not be zero.
In addition, there should ideally be only a single ... | 4 | [
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Misner-Thorne-Wheeler, p.92, Box 4.1, typo?
Thanks for the reply. However, if you look on page 88, you will see that the definition for [tex] \delta ^{\alpha \beta } _{\mu \nu } = \delta ^\alpha _\mu \delta ^\beta _\nu - \delta ^\alpha _\nu \
delta ^\beta _\mu [/tex] according to MTW does not carry the 1/2! factor that... | 4 | [
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real function?
May 31st 2009, 10:53 PM
the kopite
real function?
in the function f(x) = 1 + 1/x, when x= 0 does f(x) remain real? apparently not (seeing the graph), but why? shouldnt f(x) = 1? is my graph wrong?
May 31st 2009, 11:57 PM
mr fantastic
Quote:
It makes no sense to talk about the value of... | 4 | [
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Struggling with Latex - My Math Forum
November 8th, 2011, 06:59 AM #1
Joined: Nov 2011 Struggling with Latex
Posts: 10 If you know how to use Latex well i would love your advice?
How would i proce... | 4 | [
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Vector-big question
July 24th 2006, 01:38 AM
kingkaisai2
Vector-big question
The straight line L1 with vector equation r=a+tb cuts the plane 2x-3y+6z=6 at the right angles at the point (5,1,-1)
The Line L1= 5i+j-k+t(2i-3j+k). Another straight line, L2, has vector equation r=s(i+3j+2k)
Find the angle be... | 5 | [
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Explicit form
$1\times2+2\times3+3\times4+\ldots+(n-1)n$ $=2+6+12+20+\ldots+(n^2-n)$ $=2\left(1+3+6+10+\ldots+\frac{n^2-n}{2}\right)$ Inside the parenthesis is the sum of the first $n-1$ triangular numbers. This
can be given by the formula, $\frac{(n-1)(n)(n+1)}{6}$ Then, $2\left(1+3+6+10+\ldots+\frac{n^2-n}{2}\right)<... | 4 | [
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No idea how to prove this :)
$Give\ n\in N^*$
Prove:
$\sum_{k=0}^n \frac{C_n^k}{C_{n+k+2}^{k+1}}=\frac{1}{2}$
Just try to simplify $\frac{C_n^k}{C_{n+k+2}^{k+1}}$.
I came up with
$(n!(n+1)!)\sum_{k=0}^n \frac{(1+k)}{(n-k)!(2+k+n)!}$
Now just try to expand the sum, you'll notice someth... | 5 | [
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Nonlinear Evolution Equations for Broader Bandwidth Wave Packets in Crossing Sea States
International Journal of Oceanography
Volume 2014 (2014), Article ID 597895, 9 pages
http://dx.doi.org/10.1155/2014/597895
Research Article
Nonlinear Evolution Equations for Broader Bandwidth Wave Packets in Crossing Sea States
^... | 4 | [
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Propagation of Cross-Section Uncertainties in Criticality Calculations in the Framework of UAM-Phase I Using MCNPX-2.7e and SCALE-6.1
Science and Technology of Nuclear Installations
Volume 2013 (2013), Article ID 380284, 10 pages
http://dx.doi.org/10.1155/2013/380284
Research Article
Propagation of Cross-Section Unce... | 4 | [
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Urgent log functions
January 30th 2007, 02:01 PM #1
Junior Member
Joined
Jan 2007
Posts
35
Hi, i mixed up my log properties a bit and got these problems wrong.
1. find the inverse of the function y = logbase7(x + 3) + 7 <--- for this one i know that i have to interchange the x and y, but i dont know ... | 5 | [
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Patent US6601001 - Fault-detection for power lines
FIELD OF THE INVENTION
The invention relates to a fault-detection apparatus for detecting the presence of a fault in an electrical power line, and in particular, but not exclusively, a multi-phase underground-cable power
line and a composite line including an undergro... | 4 | [
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Hi I Need Urgent Help!!! geometric series
October 23rd 2006, 03:06 PM #1
Newbie
Joined
Oct 2006
Posts
3
A finite geomeric sequence has t1 = 0.1024 and t2 = 0.256. How many terms does sequence have, if its middle term has the value 156.25?
How do I do this question? I am little bit confused!
t1 =... | 5 | [
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Multivariable function notations
medwatt
So z=f(x,y) ...... is a function of three variables with x and y being independent
Nope, it's an equation in 3 variables. We really don't care too much about what's a function of what here.
u=F(x,y,z)=f(x,y)-z . . . all of a sudden it seems as though z has suddenly become i... | 5 | [
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convert to vertex form.
f(x)=3x^2+5x-4 please go through the steps to get to this: f(x)=3(x+5/6)^2- 73/12
Hello, bilbobaggins! For your taking care of the Ring for 60 years, I offer my humble help. f(x) = 3x^2 +5x -4 You want that, Sir, in its "vertex form", or in the form f(x) = a(x-h)^2 +k, where (h,k)
i its vertex.... | 4 | [
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Hybrid Bernstein Block-Pulse Functions Method for Second Kind Integral Equations with Convergence Analysis
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 623763, 8 pages
http://dx.doi.org/10.1155/2014/623763
Research Article
Hybrid Bernstein Block-Pulse Functions Method for Second Kind Integral Equation... | 5 | [
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0.01904296875,
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0.01818847656... | 20,327 | 20327 | |
EXAM 1 NAME____________________________
PHYS 2010 Sample Exam for CH's 7, 8, 9
1] A 0.150 kg object tied to a string is whirled in a horizontal circle at a constant angular speed
of 3.50 revolutions/sec. The tension in the string is 75.0 N. What is the length of the string?
ANSWER: 1.03 m
2] A wheel of diameter 0.80... | 4 | [
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0... | 20,328 | 20328 | |
Sunrise and Sunset Time
How to Calculate Sunrise and Sunset Times
The time of sunrise and sunset depends of the time of year and your latitude on Earth. During the summer solstice around June 21, the farther north you are, the earlier the sun rises and the later
the sun sets. The farther south you are, the later the... | 5 | [
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0.038330078125,
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0.0065917... | 20,329 | 20329 | |
help plz! tan^-1(s) = 1/1+s^2 how????
October 28th 2007, 07:47 AM #1
Newbie
Joined
Oct 2007
Posts
18
help plz! tan^-1(s) = 1/1+s^2 how????
I have a formula that I am trying to differentiate, but having lots of problems with it:
r(s)= tan^-1 s, root of 2 /2 log(1+s^2), s - tan^-1 s)
its derivates:... | 5 | [
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0.02783203125,
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0.025390625,
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0.04052734375,
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0.0262451171875,
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-0.... | 20,330 | 20330 | |
Fibonacci sequence proof
May 20th 2010, 06:36 AM #1
Newbie
Joined
May 2010
Posts
1
Fibonacci sequence proof
Hi,
I'm having trouble solving the following proof on my study guide for an exam:
Prove for the Fibonacci sequence F_k
F_k*F_k - F_(k-1)*F_(k-1) = F_k*F_(k+1) - F_(k+1)*F_(k-1)
... | 4 | [
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0.0111083984375,
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... | 20,331 | 20331 | |
Patent US6298462 - Data transmission method for dual diversity systems
FIELD OF THE INVENTION
The present invention relates to data transmission systems and methods for diversity systems used to combat multipath fading in mobile radio communications and, more particularly, to data
transmission methods for dual diversi... | 4 | [
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0.031494140625,
0.07275390625,... | 20,332 | 20332 | |
Diffrential Equations..
May 2nd 2009, 11:23 AM
change_for_better
Diffrential Equations..
The set of solutions of the initial - value problem:
http://www11.0zz0.com/2009/05/02/16/649131474.jpg
for x=0, when y=1 satisfy the equation :
choose one answer:
http://www11.0zz0.com/2009/05/02/17/... | 5 | [
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Sound Intensity Problem
May 20th 2009, 12:11 PM
skeske1234
Sound Intensity Problem
At a concert, the loudness of sound, L, in decibels, is given by the equation L=10log(I/I_o), where I is the intensity, in watts per square metre, and I_o, is the minimum intensity of sound
audible to the average person, or 1.... | 4 | [
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-0.00... | 20,334 | 20334 | |
need help in understanding a probably basic integration concept
March 8th 2013, 05:54 AM #1
Newbie
Joined
Mar 2013
From
Washington DC
Posts
3
need help in understanding a probably basic integration concept
I was reading a presentation on Ito's process. I read the following.
dx = a(x,t)dt
x(... | 4 | [
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0.029296875,
-0.00558471679687... | 20,335 | 20335 | |
Matrix Power
September 3rd 2008, 06:11 PM
Brokescholar
Matrix Power
If AB = BA and p is a nonnegative integer, prove that (AB)^ p = A^p B^p.
I've been sitting on this one for an hour and I'm just ridiculously confused!
September 3rd 2008, 06:22 PM
NonCommAlg
Quote:
by induction over p. if p = 1... | 5 | [
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0.0859375,
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0.02... | 20,336 | 20336 | |
Posts about adjusted yards per attempt on Code and Football
February 1, 2014
On the eve of the Super Bowl: What is the Peyton Manning contribution to Denver’s offense?
Posted by foodnearsnellville under Data, Denver Broncos, Seattle Seahawks, Statistics, Super Bowl | Tags: adjusted yards per attempt, Peyton Manning, ... | 4 | [
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0.11865234375,
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-0.0712890625,
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0.0174560546875,
-0.0344238... | 20,337 | 20337 | |
x and x^5 have the same final digit
February 17th 2009, 07:19 AM
mathisthebestpuzzle
x and x^5 have the same final digit
This seems as though it is a simple problem....but i'm stuck.
Prove that x and x^5 have the same final digit for any integer x.
is this done by induction?
February 17th 2009, 07:42 ... | 5 | [
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... | 20,338 | 20338 | |
Equation of a Circle
August 25th 2010, 03:07 AM #1
Junior Member
Joined
Apr 2010
Posts
42
Equation of a Circle
Find the equation of a circle whose centre falls on the line y = 6 - 2x and which passes through the points A(-2,0) and B(4,0)
Since the y-value of both points A and B are 0, I can gather f... | 4 | [
0.0673828125,
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-0.042236328125,
0.04345703125,
0.10107421875,
-0.06787109375,
-0.0109863281... | 20,339 | 20339 | |
Patent US7702485 - Method and apparatus for predicting remaining useful life for a computer system
BACKGROUND
1. Field of the Invention
The present invention relates to techniques for detecting impending problems in computer systems. More specifically, the present invention relates to a method and apparatus for predi... | 4 | [
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Simple question; solving a logarithmic equation without calc.
March 13th 2013, 10:50 AM #1
Newbie
Joined
Mar 2013
From
Stockholm
Posts
8
Simple question; solving a logarithmic equation without calc.
Hi! I've not done any mathematics in over a year and am soon to be studying again. I'm slightly embarr... | 5 | [
0.00127410888671875,
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0.04101562... | 20,341 | 20341 | |
Inclination of Equatorial North Pole relative to Galactic Equator
D H
You're not working two dimensional space. You can't simply add or subtract angles anymore.
One approach is to use cartesian coordinates as an intermediary.
On January 1, 2000, the galactic north pole had a right ascension ##\alpha## of 12
^h
5... | 5 | [
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0.0205078125,
... | 20,342 | 20342 | |
Sine and Cosine Fourier series
June 26th 2010, 04:44 AM #1
Newbie
Joined
Jun 2010
Posts
4
Sine and Cosine Fourier series
Hi!
Im asked to write sine AND cosine series of $sin(x) ; x \in <0,\pi)$
*what does that mean? i thought the fourier series can exist for the sine part being 0 OR the cosine b... | 5 | [
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-0.0198974609375,
0.03662109375,
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-0.033203125,
-0.049560546875,
0... | 20,343 | 20343 | |
Additive Hazard Regression Models: An Application to the Natural History of Human Papillomavirus
Computational and Mathematical Methods in Medicine
Volume 2013 (2013), Article ID 796270, 7 pages
http://dx.doi.org/10.1155/2013/796270
Research Article
Additive Hazard Regression Models: An Application to the Natural His... | 4 | [
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-0.... | 20,344 | 20344 | |
emitabsorb
I got bored, so I put on my “relativistic glasses.”
Cool!! Now everything looks relativistic to me…
Let’s take a look at a massless-plates capacitor with area $A$ and width $d$ such that $\sqrt{A}>>d$.
Now I charge the plates with $+Q$ and $-Q$, as a result there is an electric field $E=\frac{Q}{\epsilon_... | 5 | [
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-0.003967285... | 20,345 | 20345 | |
Matlab Please help me
November 5th 2008, 07:01 PM #1
Newbie
Joined
Nov 2008
Posts
6
Matlab Please help me
Can someone help me out please even my profosser don't help me so im asking anyone to help me out on matlab. i don't even know where to start and how to form the formula.
The first MATLAB funct... | 5 | [
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Soft Rough Approximation Operators on a Complete Atomic Boolean Lattice
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 486321, 11 pages
http://dx.doi.org/10.1155/2013/486321
Research Article
Soft Rough Approximation Operators on a Complete Atomic Boolean Lattice
Mathematics Department, Faculty o... | 5 | [
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0.01... | 20,347 | 20347 | |
Measure Theory - The completion of R^2 under a point mass measure
Hello;
1. The problem statement, all variables and given/known data
Let [tex]\mathcal{A}[/tex] be the [tex]\sigma[/tex]-algebra on [tex]\mathbb{R}^2[/tex] that consists of all unions of (possibly empty) collections of vertical lines. Find the completion ... | 5 | [
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0.00689697265625,
0.0322265625,
0.03686523... | 20,348 | 20348 | |
Parallel and Tangent Lines, finding an equation
February 10th 2008, 11:16 AM #1
Member
Joined
Sep 2007
Posts
140
Parallel and Tangent Lines, finding an equation
"Find an equation of the straight line that is tangent to the graph of f(x)=sqroot(x+1) and parallel to x-6y+4=0."
I've found so far that t... | 5 | [
-0.09765625,
-0.109375,
-0.04541015625,
-0.040283203125,
-0.0220947265625,
0.07861328125,
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0.04638671875,
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0.053955078125,
-0.146484375,
0.006011962890625,
-... | 20,349 | 20349 | |
Vector word problem
March 13th 2011, 07:06 AM #1
Vector word problem
Hi all...I have some homework that I'm having some problems with.
Here is the word problem that I'm confused about...
A ship travels 18.5 km on a course of 31.2° south of east, then 12.7 km due south, then 21.5 km on the course of 61.3... | 4 | [
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-0.05493164062... | 20,350 | 20350 | |
Confusing Result From System of ODEs...
August 14th 2013, 02:51 PM #1
Newbie
Joined
Aug 2013
From
Scotland
Posts
2
Confusing Result From System of ODEs...
Hi there.
I have the following system of ODEs to solve:
$\frac{dx}{dt} = \alpha x^{\frac{3}{2}}$
$\frac{dy}{dt} &=& \sqrt{\frac{\be... | 5 | [
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0.0286865234375,
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-0.041748046875,
-0.0... | 20,351 | 20351 | |
Patent US5625454 - Interferometric method for optically testing an object with an aspherical surface
BACKGROUND OF THE INVENTION
The present invention relates to a method for testing aspherical surfaces. The method is based upon the principle that an aspherical surface is composed of various spherical surfaces of diff... | 4 | [
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0.0625,
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0.0177001953125,
0.013000488281... | 20,352 | 20352 | |
Brevet US6700991 - Hidden digital watermarks in images
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a digital watermark; more specifically, the invention relates to a method of providing hidden digital watermarks in images.
2. Description of Related Art
Due to the rapid and... | 4 | [
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0.071289062... | 20,353 | 20353 | |
Classical Action for Harmonic Oscillator
1. The problem statement, all variables and given/known data
Hello. I am attempting to evaluate the classical action of a harmonic oscillator by using the Euler-Lagrange equations.
2. Relevant equations
The Lagrangian for such an oscillator is
L=(1/2)m([tex]\dot{x}[/tex]^2-[te... | 4 | [
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0.05517578125,
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0.0283203125,
-0.05126953125,
0.024169921875,
0.048828125,
0.00142669677734375,
0... | 20,354 | 20354 | |
So i have this polynomial.....
March 18th 2012, 11:03 AM #1
Newbie
Joined
Mar 2012
From
Trinidad
Posts
19
So i have this polynomial.....
p(x)= x^3 + ax^2 + bx + 6 i know (x-2) is a factor and when divided by (x-1) the remainder is 4, i have done the first part and solved for a and b
a=-4 and b=1
... | 4 | [
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0.031494140625,
-0.025390625,
0.051025390625,
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0.06494140625,
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-0... | 20,355 | 20355 | |
Gyroscopic precession
So, I've decided that the way to answer this question is to completely solve the gyroscope problem without using vector operations. This will take quite a while, but should make sense.
First I'm going to idealize the gyroscope: it has a stationary massless frame which contacts the pivot on the ... | 4 | [
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What is the largest area of an isoceles triangle with
What is the largest area of an isosceles triangle with the perimeter 1 cm?
Hello, I find $\color{red}\frac{\sqrt{3}}{36}$ cm. I give my solution after diner. :)
Hi Let a be the equal length of 2 sides and b the length of the 3rd side. The perimeter is p = 1 = 2a+... | 5 | [
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Fluid mechanics :fluid in motion
1. The problem statement, all variables and given/known data
a vertical, 1cm-diameter jet of water impinges upon a bathroom scale such that the latter exhibits a reading of 5 kg. Estimate the volume flow rate of the jet.
2. Relevant equations
p=F/A
Q(volume flow rate)=U*A(area where th... | 5 | [
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Connected Hausdorff spaces and graphs
March 11th 2010, 04:29 PM #1
Connected Hausdorff spaces and graphs
I came up with the following question, and would appreciate if I could get some validation/invalidation.
If $X$ is connected Hausdorff and $\varphi:X\mapsto Y$ continuous then is $\Gamma_\varphi\subseteq ... | 5 | [
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Bandwidth Enhancement of Antenna Arrays Utilizing Mutual Coupling between Antenna Elements
International Journal of Antennas and Propagation
VolumeΒ 2010Β (2010), Article IDΒ 690713, 10 pages
http://dx.doi.org/10.1155/2010/690713
Research Article
Bandwidth Enhancement of Antenna Arrays Utilizing Mutual Coupling betwe... | 4 | [
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Mongolia's province math competition 9th grade.
January 25th 2013, 02:59 AM #1
Newbie
Joined
Jan 2013
From
Beijing
Posts
3
1. 3^x+4^y=5^z find all natural x, y, z numbers
2. 2^2k+1+9*2^k+5=n^2 k=? k is an integer
3. If there's a point P inside the triangle ABC where PAB=10 PBA=20 PCA=30 PAC=40... | 5 | [
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Uncertainty of temperature trends.
This post follows a
previous one
. There have been intermittent controversies about quoted trends for temperature series. One from about four years ago was
well-described
by Hu McCulloch, with a good summary of the theory. The issue is that the simple OLS regression gives general... | 4 | [
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Magnetic and electric field between current carrying coaxial cables
1. The problem statement, all variables and given/known data
Two long concentric, cylindrical conductors of radii a and b (a<b), are maintained with a potential difference V and carry equal but opposite currents I.
An electron, with velocity u paralle... | 5 | [
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4. Network adjustment with
[ < ] [ > ] [ << ] [ Up ] [ >> ] [Top] [Contents] [Index] [ ? ]
4. Network adjustment with gama-local
Adjustment of local geodetic network is a classical case of adjustment of indirect observations. After estimation of approximate values of unknown parameters (coordinates of points) ... | 4 | [
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[Quantum Mechanics] Quantum Fisher Information for a Pure State
Hi everyone.
1. The problem statement, all variables and given/known data
We are given N spins 1/2. A rotation is defined as
[itex]\rho_\theta=e^{-i\theta J_n}\rho_\theta e^{i\theta J_n}[/itex]
on an Hilbert Space H, with
[itex]J_n=n_xJ_x+n_yJ_y+n_zJ_z\:,... | 4 | [
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Physics Forums - View Single Post - Pre-image open or not?
Jooolz
Hi all,
I am struggling with the following:
If X and Y are topological spaces. and f: X x Y → ℝ is a continuous function (product topology on X x Y, Euclidean topology on ℝ)
Let g: X → ℝ defined by g(x) = sup { f(x,y) | y in Y }
Then: If A=(r, ∞)... | 4 | [
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Interconverting Tibetan and Western Years
This note was found in January 2000 among the author's papers. It has not been published before. It was written c. 1977 in India and is presumably based upon the author's study of Tibetan
calendars published there. It is reproduced here without change.
Since a Tibe... | 4 | [
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Fourier series coefficients
zezima1
The expressions for the coefficients of a fourier series are valid for all integers [0;n].
Though sometimes when I evaluate the fourier series of an even function (composed only of cosines) I get an expression for the r'th coefficient, which has r in the demoninator. It could be f... | 5 | [
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0.004150390625,
0.001930... | 20,368 | 20368 | |
11.2. Estimating Valuation
A central issue with depreciation is to determine how you will estimate the future value of the asset. Compared to the often uncertain estimates one has to do where appreciation of assets is
concerned, we are on somewhat firmer ground here. Using sources listed below should make it fairly str... | 4 | [
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Calculating Radius of Spheres
October 14th 2006, 06:34 AM
carlito1
Calculating Radius of Spheres
Hey, I'm really confused and have no idea. Could someone please complete one of these questions and take me through it. Many thanks
Calculate the Radius of each Sphere:
1. Volume of Sphere -= 250cm^3
2.... | 4 | [
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Non-homogeneous 2nd order DE with constant coefficients.
April 8th 2010, 10:22 AM #1
Member
Joined
Apr 2010
Posts
135
Non-homogeneous 2nd order DE with constant coefficients.
$d^2y/dx^2-7 dy/dx +6y=36x$
given that when y=0 $,dy/dx=4$ and x=0
i would appreciate some help with this ones is all new... | 5 | [
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0.024414... | 20,371 | 20371 | |
Trignometric Identity Questions
November 8th 2008, 04:33 PM #1
Newbie
Joined
Nov 2008
Posts
3
Trignometric Identity Questions
I'm having trouble remembering the identites from the start of the course and am now thoroughly confused haha
If somebody could help me with these questions that would be gre... | 4 | [
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... | 20,372 | 20372 | |
Definite Intergrals problem
September 15th 2010, 02:21 PM #1
Member
Joined
Feb 2010
From
NYC
Posts
98
Definite Intergrals problem
I'm only posting here because I am not seeing any way to do this in my Text book and my two math help books.
Let $\(\displaystyle \int_{10}^{19} f(x) dx =7, \ \int_{... | 4 | [
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-... | 20,373 | 20373 | |
Modulo proof help
July 14th 2008, 04:48 PM #1
Newbie
Joined
Jul 2008
Posts
13
Modulo proof help
Let n be an odd integer not divisible by three. Prove that n^2 is congruent 1 mod 24.
I started by assuming that n is an odd integer divisible by three. So I want to show that n^2 is NOT congruent to 1 mo... | 5 | [
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Patent US8224506 - Method and device for determining a maximum stabilization height in the final flight phase of an airplane
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims priority to and the benefit of French Application No. 07 52895 filed on 26 Jan. 2007, the disclosure of which is incorporated by r... | 4 | [
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0.0038909912109375,
0.058349609375,... | 20,375 | 20375 | |
Word problem
July 5th 2007, 07:50 AM #1
Junior Member
Joined
Jul 2007
Posts
43
Word problem
Hello all,
Experiencing a brain freeze here. There are two related word problems in the book I am reading. The first one I solved, the second one is giving me fits. The first problem reads:
How much wate... | 4 | [
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Hard integral
I didn't success to solve the intgral of this function x(cos(x))/((sin(x))^3) dx
Start by integrating by parts: $u = x$ $du = dx$ $dv = \frac{\cos x}{\sin^3 x} dx$ $v = -\frac{1}{2 \sin^2 x}$ $\int \frac{x \cos x}{\sin^3 x} dx = -\frac{x}{2 \sin^2 x} + \int \frac{1}{2 \sin^2 x}
dx$
| 5 | [
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Simple Generator - Calculating N Loops
1. The problem statement, all variables and given/known data
A simple generator is used to generate a peak output voltage of 26.0 V . The square armature consists of windings that are 6.3 cm on a side and rotates in a field of 0.440T at a rate of 60.0 rev/s.
How many loops of w... | 4 | [
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0.... | 20,378 | 20378 | |
Synchronization of Switched Complex Bipartite Neural Networks with Infinite Distributed Delays and Derivative Coupling
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 728606, 16 pages
http://dx.doi.org/10.1155/2013/728606
Research Article
Synchronization of Switched Complex Bipartite Neural Networks with... | 5 | [
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Factorization Question 2
September 24th 2011, 03:36 PM
sparky
Factorization Question 2
For the question below, does anyone have a quick and easy method for finding the two numbers that when added together gives 11x, and when multiplied together gives -180? I know the numbers are 20
and -9 but it takes me for... | 4 | [
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0.08984... | 20,380 | 20380 | |
Finding a solution to this equation using Frobenius method
Using the standard convention of letting [itex]a_0=1[/itex], I get:
[tex]a_1=0[/tex]
[tex]a_2=-\frac{h a_0}{(2+c)(1+c)+1+m^2}[/tex]
with the remaining odd a_n=0 and even a_n equal to:
[tex]a_n=-\frac{a_{n-2}+a_{n-4}}{(n+c)(n+c+1)+1+m^2}[/tex]
with a simila... | 5 | [
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0.013671875,
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The Optimization on Ranks and Inertias of a Quadratic Hermitian Matrix Function and Its Applications
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 961568, 6 pages
http://dx.doi.org/10.1155/2013/961568
Research Article
The Optimization on Ranks and Inertias of a Quadratic Hermitian Matrix Function and ... | 5 | [
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Patent US20030110196 - Galois field multiply/ multiply-add/multiply accumulate
RELATED APPLICATIONS
[0001] This application claims priority of U.S. Provisional applications, entitled GF2-ALU, Stein et al., serial No. 60/334,662, filed Nov. 30, 2001 (AD-239J), GALOIS FIELD MULTIPLY ADD (MPA) USING
GF2-ALU, Stein et al.... | 4 | [
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-0.059326171875,
-0.032470703125,
0.05322265625,
-0.07470703125,
0.09375,
-0.1... | 20,383 | 20383 | |
[SOLVED] Trig Functions
December 2nd 2009, 11:40 PM #1
Junior Member
Joined
Nov 2009
From
Ornskoldsvik
Posts
33
Hello mates, I would like some help with these problems,
1. Solve tan(θ) + 1 = 0, 0 ≤ θ < 2pi
2. Solve tan(θ) − 3cot(θ) = 0, 0 ≤ θ < 2pi
3. Solve 2sin(θ) − √2tan(θ) = 0, 0 ≤ θ... | 4 | [
-0.050537109375,
-0.048095703125,
0.040771484375,
0.0230712890625,
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0.002471923828125,
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0.01446533203125,
-0.000690460205078125,
-0.036376953125,
0.08349609375,
-0.08544921875,
-0.026611328125,
0.0184326171875,
0.0272216796875,
0.0118408203125,
-0.05883... | 20,384 | 20384 | |
Brevet US4680775 - Device for coding-decoding a binary digital signal bit stream for an "OQPSK" digital modulator-demodulator with four phase states
BACKGROUND OF THE INVENTION
1. Field of the invention
The present invention concerns a device for coding-decoding a binary digital signal bit stream for an "OQPSK" digit... | 4 | [
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0.1025390625,
-0.08447265625,
-0.052978515625,
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0.05078125,
0.0177001953125,
-0.00183868408203125,
-0.07666015625,
-0.038818359375,
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0.08740234375,
-0.1044921875,
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0.04248046875,
-0.031005859375,
0.0402832031... | 20,385 | 20385 | |
Finding the real parts of this equation
November 6th 2012, 04:18 AM #1
Newbie
Joined
Oct 2012
From
Lancaster
Posts
20
Finding the real parts of this equation
Finding the real parts to both sides of this equation
I am really stuck trying to find the real parts to both sides of this equation.
1... | 5 | [
-0.166015625,
0.006591796875,
0.00113677978515625,
0.024169921875,
-0.0198974609375,
-0.0634765625,
0.004425048828125,
-0.056640625,
0.06884765625,
0.00098419189453125,
0.0732421875,
-0.087890625,
0.01446533203125,
0.0052490234375,
0.05615234375,
-0.033935546875,
-0.036865234375,
-... | 20,386 | 20386 | |
Inverse Laplace Transforn
September 24th 2006, 01:43 AM #1
Newbie
Joined
Sep 2006
Posts
7
Hello!
Could anyone help me solve the problem below? I've tried it all day but I have stuck. Thanks a lot!
Problem
Find the inverse Laplace transform of {(e^(-a/s))/Sqrt[s]}, a>0, knowing that InverseLap... | 5 | [
-0.05810546875,
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0.004241943359375,
0.0556640625,
0.04443359375,
0.12255859375,
-0.0174560546875,
0.04052734375,
0.00183868408203125,
-0.003631591796875,
-0.0517578125,
-0.03759765625,
... | 20,387 | 20387 | |
The Effects of Mixing, Reaction Rates, and Stoichiometry on Yield for Mixing Sensitive Reactions—Part II: Design Protocols
International Journal of Chemical Engineering
Volume 2012 (2012), Article ID 654321, 13 pages
http://dx.doi.org/10.1155/2012/654321
Research Article
The Effects of Mixing, Reaction Rates, and Sto... | 4 | [
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0.107421875,
0.01458740234375,
-0.03173828125,
-0.00885009765625,
-0.0224609375,
0.033447265625,
-0.064453125,
-0.0081787109375,
0.0177001953125,
0.053466796875,
0.021... | 20,388 | 20388 | |
Relationship between coefficients of linear and volume expansion
madmartigano
I'm assuming I need to set [tex]{V_1} = {L_1}{W_1}{H_1}[/tex] and [tex]{V_2} = {L_2}{W_2}{H_2}[/tex]
and attempt to extract [tex]\frac{{{L_2} - {L_1}}}{{{L_1}\left( {{t_2} - {t_1}} \right)}}[/tex] from [tex]\frac{{{L_2}{W_2}{H_2} - {L_1}{... | 4 | [
-0.068359375,
0.005340576171875,
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0.0107421875,
-0.055419921875,
-0.003448486328125,
-0.01324462890625,
-0.05810546875,
0.0703125,
-0.037353515625,
0.02685546875,
-0.0234375,
-0.0458984375,
0.09423828125,
-0.06982421875,
0.0688476... | 20,389 | 20389 | |
Complex Combination Problem
July 20th 2008, 05:53 PM #1
Newbie
Joined
Jul 2008
Posts
1
Complex Combination Problem
Hey guys... I've been doing logic questions all day and I'm stuck on this last one. Please lend me a hand and give me some help...
How many ways are there to pick a collection of 11 coi... | 4 | [
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-0.01153564453125,
0.045654296875,
-0.01483154296875,
-0.044921875,
0.00592041015625,... | 20,390 | 20390 | |
How do you write 2+3i in polar form?
The polar form has the general form $r(\cos\theta + i\sin\theta)$ Where r is the modulus of the complex number and theta the argument of the complex number.
The complex number 2+ 3i is represented by the point (2, 3) in the complex plane. The "modulus" unknown008 refers to is the d... | 4 | [
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... | 20,391 | 20391 | |
Ap Physics Question.
Originally posted by pezzang
Meanwhile here is part (b)
(b) a(tan) = (dv)/(dt) = r*(dw)/(dt) = r*alpha.
a(tanA) = a(tanB)
R*alpha = (2R)*alpha(B)
alpha(b) = (R*alpha)/(2R) = alpha / R.
thus, the answer is alpha / R.
PLEASE TELL ME PART (C) AND (D). I AM REALLY REALLY REALLY CURIOUS~!!!
You messe... | 5 | [
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-0.0947265625... | 20,392 | 20392 | |
Recursion
Introduction
In normal procedural languages, one can go about defining functions and procedures, and 'calling' these from the 'parent' functions. I hope you already know that. Some languages also provide the
ability of a function to call itself. This is called Recursion.
Factorial
Factorial is a mathemati... | 4 | [
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-0.0473632812... | 20,393 | 20393 | |
The Leverage of Trading Options -
Nov
21
In order to truly understand the leverage of an option, we must compare “dollar equivalent” exposure. For example, let’s assume the $75 call trading for $8.30 has a delta of 0.60. For the next
one-dollar move, this option’s price will rise by the delta, or 60 cents, from $8.30... | 4 | [
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0.00799560546875,
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0.03125,
... | 20,394 | 20394 | |
Fibonacci Proof
December 2nd 2008, 12:34 PM #1
Member
Joined
May 2008
From
Melbourne Australia
Posts
203
Thanks
15
Fibonacci Proof
Prove that:
$\binom n1F_1+\binom n2F_2+\binom n3F_3+...+\binom n{n-1}F_{n-1}+F_n=f_{2n}$
OK So I gave it a go as follows:
$\binom nnF_n=F_n$ and $\bi... | 5 | [
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0.021240234... | 20,395 | 20395 | |
Help with 3 Geometry Questions
January 25th 2010, 04:37 PM
LittleLotte
Help with 3 Geometry Questions
Hello everyone!
I've spent hours trying to figure out these last few Geometry questions and I can't seem to find any information on it in my text book. If anyone could offer some help I would really apprecia... | 4 | [
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... | 20,396 | 20396 | |
Patent US20050144204 - Apparatus and method for computing SHA-1hash function
BACKGROUND OF THE INVENTION
This application claims the priority of Korean Patent Application No. 2003-97149, filed on Dec. 26, 2003, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in
its entirety b... | 4 | [
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Find the area enclosed by the curve (parametric equation)
1. The problem statement, all variables and given/known data
I dont really have a problem with integration here, I just need to learn how to decide what direction the integration should be in
find the area enclosed by the curve x = t^2 - 2t y = t^1/2 around th... | 4 | [
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0.07373046875,
0.01141357421875,
-0.1074... | 20,398 | 20398 | |
Urgent help required
February 25th 2010, 12:50 AM
AeroScizor
Step by step guiding required for logarithms sums
Hi,
I have encountered some challenging sums when doing my revision for my math test. Please try to help me as I will be doing the test tomorrow.
Here are the sums:
1)Find the exact value ... | 4 | [
0.02978515625,
0.0133056640625,
0.05810546875,
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0.0201416015625,
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0.052734375,
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0.0250244140625,
0.11376953125,
0.013427734375,
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0.002349853515625,
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0.03271484375,
0.042724609375,
-0.11376953125,
0.0302734... | 20,399 | 20399 |