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Homework Help
Posted by aa on Monday, September 19, 2011 at 7:20am.
what is the largest are of rectangular area that can be enclosed in sixteen meter fence
?
• math - Dr Russ, Monday, September 19, 2011 at 7:57am
I am sure that I have answered this one recently
Let the width of the rectangle = w and the ... | 5 | [
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0.1669921875,
0.03369140625,
0.014160... | 45,900 | 45900 | |
Boundedness of the derivative of the trace of an H^1 function
up vote 8 down vote favorite
2
As a research preface, this question is linked to a problem of increasing magnetism in Ginzburg-Landau equations that I have distilled for the purpose of getting to the bottom of this technical
matter.
Suppose $u_n\in H^1(B_1... | 5 | [
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-0.06835937... | 45,901 | 45901 | |
Math Help
June 16th 2008, 09:06 PM #1
Integral
I was doing some practice excersises for some diff eqs and this integral came up...now I got it right, but it was messy, can someone here give a better solution
$\int\sqrt{\frac{1}{x^2}+\frac{1}{x^4}}dx$
Now since the domain is every x greater than zero I ... | 5 | [
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0.072265625,
0.012939453... | 45,902 | 45902 | |
Is there an Error on pg. 17 of Tromba's "Teichmuller Theory in Riemannian Geometry"?
up vote 1 down vote favorite
1
I'm pretty sure that this is a minor error, but I could use some help here. So the book I'm referring to in the title is this book (MR1164870).
On pg. 16-17, he is proving that the space of almost comp... | 4 | [
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... | 45,903 | 45903 | |
calc II, but stuck on algebra
September 20th 2005, 05:53 PM #1
Newbie
Joined
Sep 2005
Posts
3
alright, so in this problem i need to solve for A.
y = 4e^x + e^-x
y = Acosh(x + ln2)
now you might already know cosh(x) = (e^x + e^-x) / 2
and with a little fooling around i found that e ^ ln2... | 5 | [
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-0.027465... | 45,904 | 45904 | |
simple probability
July 7th 2008, 09:48 PM #1
Junior Member
Joined
Jun 2008
Posts
51
simple probability
how many even numbers can be formed with the digits 3,4,5,6,7 by using some or all of the numbers (repetitions are not allowed) ?
what i did was
3x4P4 + 3x4P3 + 3x4P2 + 3x4P1 + 3
but the a... | 4 | [
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-0.0174560546875,
-0.06201171875,
0.00897216796875,
-0.0942382812... | 45,905 | 45905 | |
Calculus related rates
A plane flying horizontally at a altitude of 4mi and a speed of 440mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it
is 10mi away from the station. Thanks!
Hello, asnxbbyx113! Quote: A plane flying horizontally at a... | 5 | [
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0.06884765625,
-0.0152587890625,
0.0419921875,... | 45,906 | 45906 | |
Writing Algebraic Equations(Help Me)
February 19th 2008, 06:58 AM #1
Newbie
Joined
Feb 2008
Posts
6
Writing Algebraic Equations(Help Me)
An apple grower finds that an apple tree produces on an average 400 apples per years, if no more than 16 trees are planted in a limit area. For each additional tree pla... | 5 | [
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-0.08251953125,
0.0086669921875,... | 45,907 | 45907 | |
Concave function
January 16th 2010, 12:10 PM #1
Junior Member
Joined
Aug 2009
Posts
30
Concave function
Let f(x) be a concave function of N variables defined over a convex set,S $\in R^N$Let g be an increasing and concave function of one var.
prove that g(f(x)) is concave over S
Last edited by... | 5 | [
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0.0062561035156... | 45,908 | 45908 | |
cos and natural log
May 8th 2012, 11:53 AM #1
Junior Member
Joined
Mar 2012
From
San Francisco
Posts
32
cos and natural log
Find the smallest positive number 't' such that:
10^(cos t) = 4
Round answer to three decimal places.
t = ? radians
Thanks! =)
Re: cos and natural log
Re: co... | 4 | [
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0.03... | 45,909 | 45909 | |
Trying to get a general eqn, (a non linear 2nd order ODE) with 4 governing equations
May 29th 2012, 11:43 AM
munkifisht
Trying to get a general eqn, (a non linear 2nd order ODE) with 4 governing equations
I have the following 4 governing equations
i) V1(t) = a.Id(t)^2 + Rd.Id(t)
ii) V1(t) = V(t) - R.I(... | 4 | [
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0.0546875,
-0... | 45,910 | 45910 | |
Need help with interest (Nominal)
February 27th 2010, 03:42 PM
krzyrice
Need help with interest (Nominal)
I need help with how to calculate nominal annual rate.
1) A sum of $850 is invested for 10 years and the interest is compounded quarterly. There is $1000 in the account at the end of 10 years. What is t... | 4 | [
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... | 45,911 | 45911 | |
Supremum example
September 29th 2008, 09:40 PM
lllll
Supremum example
Let X and Y be nonempty bounded subsets of $\mathbb{R}$, where $\alpha$ = Sup X and $\beta$ =Sup(Y). Let Z ={ $xy: x \in X \mbox{and} \ y \in Y$}. show by example that $\alpha\beta \ eq$ Sup(Z)
in general.
I was thinking of letting Su... | 5 | [
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0.0390625,
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... | 45,912 | 45912 | |
Mapping complex numbers
March 15th 2011, 07:42 PM #1
Senior Member
Joined
Apr 2010
Posts
487
Mapping complex numbers
The question:
For the mapping f(z) = \frac{z − i}{z + i}, find the image of {z ∈ C : Im(z) ≥ 0}
I'm confused as to how to attempt this. I tried setting f(z) = w, the rearranged to... | 5 | [
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-0.04... | 45,913 | 45913 | |
Normal form in second-order logic
up vote 1 down vote favorite
1
In a first-order logic, L, it is possible to transform a sentence, S, containing variables into a sentence S' in so-called 'clause form' - i.e. with a matrix in conjunctive normal form and a prefix
consisting of only universal quantifiers - such that S i... | 4 | [
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0.03588867187... | 45,914 | 45914 | |
Homework Help
Posted by kellie on Sunday, October 23, 2011 at 7:23pm.
Compute the orbital radius of an earth satellite that has an equatorial orbit and always remains above a fixed point P on the earth's surface. Communication satellites have such "geosynchronous"
orbits (see figure). These satellites are used to rela... | 5 | [
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... | 45,915 | 45915 | |
multinominal expansion
February 12th 2011, 02:08 PM #1
Member
Joined
Nov 2010
Posts
93
multinominal expansion
Hello, I have this multinominal and I also have the expanded version of it.
The problem is I cannot understand how the expanded version was achieved.
Can someone please explain it to me. ... | 4 | [
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0.... | 45,916 | 45916 | |
SPUG: FW: Help..Any Math GENIUS out there?
Jim Flanagan jimfl at tensegrity.net
Thu Jul 25 16:16:25 CDT 2002
--On Thursday, July 25, 2002 10:50 AM -0700 "Orr, Chuck (NOC)"
<chuck.orr at attws.com> wrote:
>> I am hoping to use Perl to solve an equation like the below:
>>
>> A + (36*B) + (360*C) + (360... | 4 | [
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0.043212890625,
0.06494140625,
0.0673828125,
-0.0771484375,
0.04809570... | 45,917 | 45917 | |
Trigonometry
What does $\sin \left(x+\frac14k\pi\right)+\cos\left(x+\frac14k\pi \right)$ equal when convering it using the form: $a\sin\theta+b\cos\theta = R\sin(\theta+\alpha)$?
Expand the right hand side of $a\sin\theta+b\cos\theta = R\sin(\theta+\alpha)$ using the compound angle formula and compare each side: $a = ... | 4 | [
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0.068359375,
0.01104736328125,
0.00604248046875,
-0.017578125,
0.0344238281... | 45,918 | 45918 | |
Factoring Polynomials Using Substitution
Date: 09/26/2001 at 19:20:39
From: Scott
Subject: Factoring
I have a 25-question factoring assignment, and I can't get two of the
questions on my own. Here they are:
x^2+10xy+25y^2-81z^2
a^4-6a^2b^2-27b^4
Date: 09/27/2001 at 11:17:52
From: Doctor Ian
Subject: Re: Factorin... | 4 | [
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-0.0067443... | 45,919 | 45919 | |
How to prove a unit norm matrix is the average of two unitary matrix
Take the 2-minute tour ×
MathOverflow is a question and answer site for professional mathematicians. It's 100% free, no registration required.
How to prove a unit norm matrix is the average of two unitary matrix
linear-algebra
which norm is u... | 5 | [
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0.0419921875,
0.0196533203125,
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0.0037994384765625,
0.0541... | 45,920 | 45920 | |
continous random variable
March 23rd 2008, 04:29 PM #1
continous random variable
Y has a distribution function:
$F(y) = \left\{ \begin{array}{rcl} 0 & \mbox{for} & y \leq 0 \\ <br /> \\<br /> \frac{y}{8} & \mbox{for} & 0 < y < 2 \\<br /> \\<br /> \frac{y^2}{16} & \mbox{for} & 2 \leq y < 4 \\<br /> \\<br />
... | 5 | [
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-0.02783203125,
-0.0966796... | 45,921 | 45921 | |
Variance for Functions
January 6th 2006, 09:36 AM #1
Global Moderator
Joined
Nov 2005
From
New York City
Posts
10,616
Thanks
9
Variance for Functions
I have never seen anyone do this but has anyone defined the variance for a countinous function $f(x)$ on interval $[a,b]$?
I used "reasonable" ... | 4 | [
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0.0400390625,
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0.064453125,
-0.07568359375,
-0.029... | 45,922 | 45922 | |
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Topic: Unbounded second derivative
Replies: 4 Last Post: ... | 5 | [
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-0.037353515625,
-0.06542968... | 45,923 | 45923 | |
Integral Method using the Substitution Method
July 16th 2011, 06:41 PM #1
Member
Joined
Jan 2009
From
Ontario Canada
Posts
219
Integral Method using the Substitution Method
Hey There,
I am doing a question and I can solve it the antiderivative way, but I can't seem to come up with the substitutio... | 4 | [
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-0.0341796875,
0.0108642578125,
-0.0047607421875,
0.01141357421875,
0.0... | 45,924 | 45924 | |
Sentential Derivation (logic) help please
July 30th 2010, 12:20 AM #1
Junior Member
Joined
Nov 2009
Posts
38
Sentential Derivation (logic) help please
I really can't figure this derivation out.
Assumptions:
1. $eg (F \vee G)$ iff $(eg F \supset eg F)$
2. $eg G \supset F$
I need to deriv... | 4 | [
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0.07177734375,
... | 45,925 | 45925 | |
Factor 2x^3 - 3x + 1
Please show me how to factor 2x^3 - 3x + 1 Thanks in advance!
It is easy to see that expression =0 when x=1 It follows that x-1 is a factor. The 2nd bracket then must begin with 2x^2 and end in -1 SO 2x^3-3x+1= (x-1)(2x^2 _1) Multiplying these out as they are
would give a term -2x^2 which we dont ... | 4 | [
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0.045166015625,
0.0166015625,
0.0322265625,
-0.05322265625,
-0.00424194335... | 45,926 | 45926 | |
The nature of critical points of a function
October 1st 2012, 05:38 AM #1
Newbie
Joined
Oct 2012
From
Australia
Posts
24
The nature of critical points of a function
Can anyone help with determining the nature of the critical points for the function:
f(x,y) = x^3 - x + y^2 - 2xy?
By using th... | 5 | [
0.0145263671875,
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-0.027587890625,
0.026123046875,
0.006805419921875,
0.0206298828125,
0.04345703125,
0.023681640625,
0.035888671875,
0.01171875,
-0.006805419921875,
-0.0294189453125,
0.04638671875,
... | 45,927 | 45927 | |
Solve for variable exponent...
How should I go about solving this? Is it even possible? 32/48 = (6^b)/(14^b)
I hope you know logarithms and the rules of logs $\frac{32}{48}=\frac{6^b}{14^b}$ so $\log\frac{32}{48}=\log\frac{6^b}{14^b}$ so $\log\frac{32}{48}=\log 6^b-\log 14^b$ $\log\frac{32}{48}=b\log 6-b \
log 14=b(\l... | 4 | [
0.02197265625,
0.022705078125,
-0.09423828125,
0.045654296875,
-0.07080078125,
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0.035400390625,
0.0228271484375,
0.01904296875,
-0.017333984375,
-0.02197265625,
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0.06494140625,
0.08154296875,
0.11572265625,
-0.1484375,
0.075195312... | 45,928 | 45928 | |
Math Images
Involute
From Math Images
Involute
An involute of a circle can be obtained by rolling a line around the circle in a special way.
Basic Description
Imagine you have a string attached to a point on a fixed curve. Then, tautly wind the string onto the curve. The trace of the end point on the string ... | 4 | [
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0.042724609375,
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0.04833984375,
-... | 45,929 | 45929 | |
Density Distribution + Standardised Normal Distribution
August 25th 2009, 06:55 PM #1
Newbie
Joined
Aug 2009
From
United Kingdom
Posts
17
Density Distribution + Standardised Normal Distribution
Hi there,
I have 2 questions to ask and would be very appreciative as to learning the methods to solvi... | 5 | [
0.11865234375,
-0.00115203857421875,
0.01104736328125,
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0.05224609375,
-0... | 45,930 | 45930 | |
Algebraic fraction help please.
December 15th 2009, 09:39 AM #1
Junior Member
Joined
Dec 2009
Posts
61
Algebraic fraction help please.
Write as a single fraction and simplify,
(8/ x^2 + 2x -3) - (4/ x^2 - 1)
Can someone help me with this q please? Thanks
1. Factorize the denominators:
$... | 4 | [
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0.006927490234375,... | 45,931 | 45931 | |
[SciPy-User] curve_fit and least squares
Warren Weckesser warren.weckesser@enthought....
Thu Oct 22 15:12:10 CDT 2009
Kris,
Your script worked for me if I explicitly converted everything to numpy
arrays. Here's my edited version:
----------
#!/usr/bin/env python
import numpy as np
import scipy as sp
import pylab a... | 5 | [
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0.06640625,
-0.09033203125,
-0.... | 45,932 | 45932 | |
hilbert space
March 15th 2011, 01:35 PM #1
Member
Joined
Feb 2010
Posts
133
hilbert space
Hello,
I am considering the banach-space $L^{p}(\mathbb{R})$ and the functions:
$f=\chi_{[0,1[}$
$g=\chi_{[1,2[}$
I have calculated the numbers $\Vert f \Vert_{p}$, $\Vert g \Vert_{p}$, $\Vert f+... | 4 | [
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-0.04736328125,
-0.0274658203125,
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-0.09814453125,
-0.06787109375,... | 45,933 | 45933 | |
Conservation Laws for Systems of Particles
J. Peraire, S. Widnall
16... | 5 | [
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0.032958984375... | 45,934 | 45934 | |
Posts about Exponential distribution on SOA Exam P / CAS Exam 1
Problem 90-A
A random loss follows an exponential distribution with mean 20. An insurance reimburses this random loss up to a benefit limit of 30.
When a loss oc... | 5 | [
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-0.... | 45,935 | 45935 | |
Math Help
January 11th 2010, 06:02 PM #1
Junior Member
Joined
Nov 2009
Posts
73
sketch
Sketch Re(z^4). ie:sketch real part of z^4
I tried to do the arithmetic and I think Re(z^4)=x^4 - 6x^2*y^2 + y^4
$z^4 = (x + iy)^4$
$= \sum_{k = 0}^4 {4\choose{k}}x^{4 - k}(iy)^k$
$= x^4 + 4ix^3y + ... | 5 | [
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0.07080078125,
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-0.003555... | 45,936 | 45936 | |
Math Images
Hyperboloid
From Math Images
Hyperboloid
Field: Calculus
... | 4 | [
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-0.04... | 45,937 | 45937 | |
Logarithms
November 20th 2010, 06:23 AM #1
Member
Joined
Sep 2009
Posts
145
Logarithms
Hi,
$\text{If} \log 4 + 2 \log p = 2, \,\,\text{find p.}$
Initially I tried this:
$\log\, 4 + \log p^2 = 2$
$\log\, 4p^2 = \log 2\bigg]\Rightarrow$ logs cancel since they're of the same base
$4... | 4 | [
0.045166015625,
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0.062... | 45,938 | 45938 | |
Math Forum Discussions
Henry
Posts: 1,089
Registered: 12/6/04
Re: Conditional probability problem in the context of a simulation
Posted: Jan 21, 2011 11:18 AM
On Jan 21, 3:44 pm, "danhey...@yahoo.com" <danhey...@yahoo.com> wrote:
> On Jan 21, 8:45 am, Mike Lacy <mgl...@gmail.com> wrote:
>
>
>
>
>
> > On Jan 20, 3:42 ... | 5 | [
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... | 45,939 | 45939 | |
The (algebraic) dual of a completion
up vote 3 down vote favorite
It is easy to show that $Hom(\mathbb{Z}_p,\mathbb{Z})=0$ (one just uses that each integer coprime to $p$ is a unit and therefore each image of such a homomorphism has infinitely many divisors).
However, I wonder if this is true more generally:
Questio... | 5 | [
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When C(K) is closed in sigma strong topology?
up vote 2 down vote favorite
1
Fix a compact Hausdorff space $K$ and think about $C(K)$ as a C*-algebra acting on a Hilbert space $H$. Suppose that $C(K)$ is closed in $\mathcal{B}(H)$ in:
• $\sigma$-strong
• $\sigma$-strong*
topology. Must $K$ be extremelly disconne... | 5 | [
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... | 45,941 | 45941 | |
quotients of polynomial rings
up vote 5 down vote favorite
This might be a silly question but is there a criterion for when the quotient of $k[X_1,\ldots, X_n]$ by some ideal is isomorphic to a polynomial ring? For instance $k[X,Y]/\langle Y \rangle \simeq k
[X]$ but $k[X,Y]/\langle Y^2 \rangle$ is not a polynomial ri... | 4 | [
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... | 45,942 | 45942 | |
Factorization of the polynomial
Since $\sqrt{{{\left( \sqrt{2p+1}+\sqrt{2p-1} \right)}^{2}}}=\sqrt{2p+1}+\sqrt{2p-1},$ which is the denominator, you can factor the numerator as a sum of perfect cubes.
Thank you, but I already tried that to no avail. Thank you, that worked like a charm! I already came up with the idea,... | 5 | [
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0.0014114379882... | 45,943 | 45943 | |
eliminating the parameter to obtain an x-y equation
eliminate the parameter t to obtain an x-y equation from the two parametric equations: x=4cost and y=2sint
1. You are supposed to know that $\sin^2(t)+\cos^2(t)=1$ 2. $<br /> \begin{array}{l}x=4\cos(t)\\ y=2\sin(t)\end{array}~\implies~\begin{array}{l}\le ft(\dfrac x4... | 4 | [
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-0.... | 45,944 | 45944 | |
Abstract algebra proof
September 30th 2008, 11:52 AM #1
Newbie
Joined
Apr 2008
Posts
10
Abstract algebra proof
Let H be a subgroup of a finite group G. Suppose that g belongs to G and n is the smallest possible integer such that g^n in H. Prove that n divides the order of the element g.
I am sorry I... | 4 | [
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Quadratics? Simultaneous equations, not understanding how to finish problem.
December 6th 2008, 10:13 PM #1
Newbie
Joined
Dec 2008
Posts
19
Quadratics? Simultaneous equations, not understanding how to finish problem.
Okay. Here goes... Thanks in advance to anyone who can help.
Find the range of valu... | 4 | [
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0.03955078125,
-0.033447265625,
0.005706787... | 45,946 | 45946 | |
Center of Mass
December 4th 2006, 02:02 PM #1
Newbie
Joined
Sep 2006
Posts
24
Center of Mass
I have two problems here that i cant figure out
EDIT find the center of mass given that the mass is constant
1.)the "triangular" region in the first quadrant between the circle x^2+y^2=9 and the lines x... | 5 | [
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Direct proof that the centralizer of $GL(V)$ acting on $V^{\otimes n}$ is spanned by $S_n$
up vote 19 down vote favorite
6
Let $V$ be a finite dimensional vector space over a field of characteristic zero. Let $A$ be the space of maps in $\mathrm{End}(V^{\otimes n})$ which commute with the natural $GL(V)$ action. Clear... | 5 | [
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Fundamentals of Hydraulic Engineering Systems 4th Edition Chapter 3.7 Solutions | Chegg.com
7162-3.7-1P AID: 1825 | 19/04/2013
a)
Calculate the total head loss resulting from Darcy-Weisbach equation
The friction equation is expressed as
Substitute the value of 2 for m
Denote discharge as Q, friction factor as f, d... | 5 | [
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-... | 45,949 | 45949 | |
simplify this function
December 7th 2008, 10:08 AM #1
$<br /> <br /> \ln y \;=\;11\bigg[\frac{x^2}{2} - \frac{11}{2}\ln(x^2+11)\bigg] + C<br />$
can someone rewrite this in terms of y?
I know you need to multiply by e, but I don't know what to do from there.
Thanks.
Dear woohoo,
not multip... | 5 | [
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... | 45,950 | 45950 | |
Math Forum: Teacher2Teacher - Q&A #9409
Teacher2Teacher Q&A #9409
Teachers' Lounge Discussion: Solving algebraic equations
... | 4 | [
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0.0184326171875... | 45,951 | 45951 | |
Really urgent mechanics question
April 19th 2009, 12:28 PM #1
Junior Member
Joined
Mar 2009
Posts
34
Really urgent mechanics question
Hi I am really stuck on the following and have an exam on it in 2 days. Can somebody please help me.
A particle of mass m collides elastically at an angle of 90 degre... | 4 | [
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... | 45,952 | 45952 | |
Path connected
October 17th 2011, 03:03 PM
dwsmith
Path connected
If X and Y are path connected, show that XxY is also path connected.
For a fixed $x_0\in X$ and $y_0\in Y$
Let A be the set of all the points that join $x_0\times y_0$ by a path in $U\times V$.
Since X and Y are both path connected, ... | 4 | [
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0.0196533203125,
-0.01208... | 45,953 | 45953 | |
help re-arranging a complex formula
October 20th 2009, 02:55 PM #1
Newbie
Joined
Oct 2009
Posts
1
help re-arranging a complex formula
Hi,
I'm having some trouble rearranging the formula below in terms of t, i'm sure its much easier than I think but if would be great if i could be pointed in the right... | 4 | [
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-0.031738281... | 45,954 | 45954 | |
Venn Diagram Problem
October 16th 2009, 07:34 AM
fifthrapiers
Venn Diagram Problem
In a group of 100 students, more students are on the fencing team than are members of the French club. If 70 are in the club and 20 are neither on the team nor in the club, what is the minimum
number of students who could be b... | 4 | [
0.08935546875,
0.0279541015625,
0.00726318359375,
-0.072265625,
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0.078125,
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0.01068115234375,
0.0079345703125,
0.06640625,
0.03857421875,
-0.09619140625,
0.1142578125,
0.09716796875,
0.0380859375,
0.03857421875,
-0.05322265625,
-0.07177734375,
-... | 45,955 | 45955 | |
Classical Limit of Feynman Path Integral
up vote 5 down vote favorite
3
I understand that in the limit that h_bar goes to zero, the Feynman path integral is dominated by the classical path, and then using the stationary phase approximation we can derive an approximation
for the propagator which is a function of the cl... | 4 | [
-0.0771484375,
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0.07421875,
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0.060546875,
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0.0264892578125,
0.08056640625,
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-0.050537109375,
0.0025177001953125,
0.0196533203125,
-0.00469970703125,
-0.046... | 45,956 | 45956 | |
Calculating Energy Loss in a collision
January 3rd 2010, 07:56 AM #1
Newbie
Joined
Dec 2009
Posts
5
Calculating Energy Loss in a collision
Hi guys, I have a simple question involving the collision of 2 particles of different masses. Particle 1 of mass m is travelling with speed u towards particle 2 of ma... | 4 | [
0.042724609375,
0.0002994537353515625,
0.050537109375,
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0.05517578125,
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0.0981... | 45,957 | 45957 | |
Are there two non-homotopy equivalent spaces with equal homotopy groups?
MathOverflow is a question and answer site for professional mathematicians. It's 100% free, no registration required.
Could someone show an example of two spaces X and Y which are not of the same homotopy type, but never... | 4 | [
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... | 45,958 | 45958 | |
Difficult word problem...
February 23rd 2010, 06:25 PM #1
Member
Joined
Oct 2008
Posts
124
Difficult word problem...
An army begins marching in a single file, straight line that is 40 miles long. They march for 40 miles. In the time that it takes the army to march 40 miles, the soldier who is last in lin... | 4 | [
-0.0032196044921875,
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0.08740234375,
-0.0556640625,
-0.018... | 45,959 | 45959 | |
Base three division
February 11th 2013, 09:20 PM
JojoZ
Base three division
I need help with division in base three;
Find the quotient for 222(base three) / 22(base three)
it would be helpful if you can explain step by step
I also need help with subtraction in different bases beside base 10. For exam... | 4 | [
-0.032958984375,
0.00872802734375,
-0.052734375,
-0.06201171875,
0.0184326171875,
0.046142578125,
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0.06787109375,
-0.0036468505859375,
0.00787353515625,
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-0.0166015625,
0.025390625,
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0.170... | 45,960 | 45960 | |
Deamortization – Part 2: Binomial Heaps
Posted by Maverick Woo on Monday, August 1, 2005 Leave a comment (0) Go to comments
In Part 1, I have shown how you can increment a “binary” counter in `O(1)` time if you use a redundant number system. Now I am going to show you how you can apply this simple abstraction to
deam... | 4 | [
-0.0033111572265625,
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0.0203857421875,
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... | 45,961 | 45961 | |
How To Find The General Solution?
April 11th 2010, 01:34 PM #1
Member
Joined
Apr 2008
Posts
123
How To Find The General Solution?
1. How do you find the general solution for the given differential equation?
dP/dt = P(P+3)
Answer: P = (3Ae^(3t))/(1-Ae^(3t))
2. Of the pine trees in Manning Pa... | 5 | [
0.001312255859375,
0.00494384765625,
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0.0471191... | 45,962 | 45962 | |
This Set Of Problems Is Designed To Help You Prepare ... | Chegg.com
Capacitors
This set of problems is designed to help you prepare for the lab oncapacitors. Here are some things you should know.
The charge on a capacitor is proportional to the voltage. Theconstant of proportionality is the
capacitance
:
q
=
V... | 5 | [
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... | 45,963 | 45963 | |
Nash inequality on a compact domain?
up vote 1 down vote favorite
2
I have come across a few papers that make use of the Nash inequality for functions on a compact domain. Unfortunately, nobody cites a reference for the proof of this result. Is going from the
classical Nash inequality on $\mathbb{R}^n$ to that on comp... | 4 | [
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-0.... | 45,964 | 45964 | |
factorise
November 19th 2008, 01:04 AM #1
factorise
3(4x² -y² )-5(4x² +4xy+y² )
I done the 1st step which is 3(2x+y)(2x-y)-5(2x+y)²
(2x+y)(3(2x-y))-5(2x+y)
but then i cant facortise anymore after i take out the (2x+y)
3(2x+y)(2x-y)-5(2x+y)²=(2x+y)[3(2x-y)-5(2x+y)]=(2x+y)[6x-3y-10x-5y]=
=(2x+... | 4 | [
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... | 45,965 | 45965 | |
help with this domain
June 20th 2009, 11:41 AM #1
Super Member
Joined
Jun 2009
From
Africa
Posts
641
hi
i'm trying to find the domain of this function :
let $\mathbb{E} = [-\pi,+\pi]$
$x \in \mathbb{E} ;$$f(x) = \sqrt{\frac{1+\cos \left ( x \right )}{1-\cos \left ( x \right )}}$
i star... | 4 | [
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0.037109375,
-0.1689453125... | 45,966 | 45966 | |
local linearization
April 13th 2008, 04:52 PM #1
Newbie
Joined
Apr 2008
Posts
12
local linearization
hi how do you find the local linearization of the function g(x,t) = x2cos(2t) at the point (2,P/2)
i have no idea
They are asking you to find the tangent plane at the point
I guess you mean... | 5 | [
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-0.0598... | 45,967 | 45967 | |
Freshers Interviews
Stack:A stack is a linear list of elements for which all insertions and deletions(usually accesses) are made at only one end of the list.
They are also called as LIFO lists(Last Input First Output).The operations supported are :1)IsEmpty(S): returns whether the stack is empty or not.2)IsFull(S): re... | 5 | [
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0.0361328125,
-0.... | 45,968 | 45968 | |
proof of two cross products.
February 23rd 2009, 09:24 PM #1
Senior Member
Joined
Jan 2007
Posts
477
proof of two cross products.
just wanted to see 2 proofs if anyone knows them or where I can point my browser to see them please,
just proofs for these cross products where a and b are vectors and c ... | 4 | [
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0.1396484375,
0.0172119140625,
0.0361... | 45,969 | 45969 | |
PLease Differentiate...
January 21st 2007, 07:44 PM #1
Senior Member
Joined
Jul 2006
From
Shabu City
Posts
381
PLease Differentiate...
1.)y=x^5(e^{-3lnx })
The answer for this is 2x
2.) FInd an equation of the normal line to the curve $y = \sqrt{x^2 + 9}$ at the point $(4,5)$
Thanks
... | 5 | [
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0.0322265625,
-0.04638671875,
0.00230407714843... | 45,970 | 45970 | |
What is the translation in Fourier transform for a function to have exp. decay at $x\to -\infty$
up vote 5 down vote favorite
It is known that smooth functions with exponential decay at $\pm\infty$ are functions whose Fourier transform have analytic continuation in some suited complex strip. I was wondering what happe... | 4 | [
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0.057373046875,
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0.039794921875,
-0.0678710937... | 45,971 | 45971 | |
Fourier Integral and the Dirac Delta
November 30th 2006, 08:45 AM
topsquark
Fourier Integral and the Dirac Delta
This is going to end up being a simple question with a simple answer, but I just can't tweak the answer out of my Math Methods text.
I have the following statement:
$\dot{\Delta}(\vec{x},0) =... | 4 | [
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0.026611328125,
0.0556640625... | 45,972 | 45972 | |
urgent simple geometry proof (equilateral triangle)
May 22nd 2008, 10:38 PM #1
Newbie
Joined
Sep 2007
Posts
18
urgent simple geometry proof (equilateral triangle)
ABC is an equilateral triangle with sides of 2 cm. BC is extended its own length to point D and point E is the midpoint of AB. ED meets AC at ... | 4 | [
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0.02099609... | 45,973 | 45973 | |
Similar Constructing Method for Solving the Boundary Value Problem of the Composite First Weber System
Dong Xiaoxu^1, , Li Shunchu^1, Gui Dongdong^2, Pu Jun^1, Li Huichun^3
^1School of Mathematics and Computer Engineering, Xihua University, Chengdu, China
^2Beijing Dongrunke Petroleum Technology Co., Ltd., Beijing, ... | 5 | [
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-0.005126953125,
-0.0189208984375,
-0.0048... | 45,974 | 45974 | |
complex eigenvalues
November 17th 2008, 09:30 AM #1
Newbie
Joined
Nov 2008
Posts
6
complex eigenvalues
i've been given a problem to find the eigenvalues of R = RyRz given theta = pi/2. Ry and Rz are your standard rotation matrixes, so
the real one is simple enough, but when i try to sub in lander i g... | 4 | [
-0.1064453125,
0.018798828125,
-0.076171875,
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0.08056640625,
0.02392578125,
-0.045654296875,
-0.068359375,
-0.07... | 45,975 | 45975 | |
Please help me solve this problem. I have been stuck with it for two days now!
September 24th 2012, 10:43 PM #1
Newbie
Joined
Sep 2012
From
New Delhi
Posts
1
Please help me solve this problem. I have been stuck with it for two days now!
Find the vector and Cartesian equation of the line passing throu... | 4 | [
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0.0172119140625,
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0.07470703125,
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0.02734375,
0.0625,
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-0.00022220611572265625,
0.034423828125,
-0.080078125,
0.05712890625,
-0.07958984375,
-0.01965332031... | 45,976 | 45976 | |
problem with proving identities using basic identities
June 22nd 2010, 11:27 PM #1
Newbie
Joined
Jan 2010
Posts
11
problem with proving identities using basic identities
i have a problem with this:
prove,
a) $\frac{1-tan^2\theta}{cot^2 \theta-1}=tan^2\theta$
b) $(cos \theta+sin \theta)^2+(... | 4 | [
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0.052978515625,
0.033203125,
0.0576171875,
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0.03173828125,
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0.06396484375,
-0.0029449462890625,
-0.00704956054... | 45,977 | 45977 | |
challenging sequences problem
February 25th 2009, 02:39 PM #1
Member
Joined
Aug 2008
Posts
249
challenging sequences problem
Suppose that a, b, and c are three consecutive terms in a geometric sequence. Show that 1/a+b, 1/2b, and 1/c+b are three consecutive terms in an arithmetic sequence.
so far i ... | 4 | [
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0.01025390625,
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0.0859375,
0.00921630859375,
0.07568359375,
-0.0306396484375,
0.049560546875,
... | 45,978 | 45978 | |
A013929 - OEIS
A013929 Numbers that are not squarefree. Numbers that are divisible by a square greater than 1. The complement of A005117. 180
4, 8, 9, 12, 16, 18, 20, 24, 25, 27, 28, 32, 36, 40, 44, 45, 48, 49, 50, 52, 54, 56, 60, 63, 64, 68, 72, 75, 76, 80, 81, 84, 88, 90, 92, 96, 98, 99, 100, 104, 108, 112, 116, ... | 4 | [
-0.029052734375,
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0.08642578125,
0.033935546875,
0.000823974609375,
0.00107574462890625,
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0.0654296875,
-0.024169921875,
-0.07177734375,
-0.0419921875,
0.0049438476... | 45,979 | 45979 | |
Diffusion convergence
up vote 5 down vote favorite
2
Consider diffusion:$$d\eta^x_{t}=\sigma(\eta^x_{t})dW_{t}+\mu(\eta^x_{t})dt,\quad \eta_0^x =x,$$ where $W$ is a Wiener process. We assume that $\sigma,\mu$ are such that the diffusion is well-defined
and that it converges to the invariant measure $\eta_{\infty}$ (e.... | 4 | [
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-0.01397705078125,
0.056640625,
0.08544921875,
-0.08837890625,
-... | 45,980 | 45980 | |
Solving for the inverse of a function.
October 25th 2013, 04:05 PM #2
October 25th 2013, 03:34 PM #1
Member
Solving for the inverse of a function.
Re: Solving for the inverse of a function.
Re: Solving for the inverse of a function.
I'm trying to cross multiply both sides by 2y + 3 / 1 so then I am left with a... | 4 | [
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0.05029296875,
-0.0380859375,
-0... | 45,981 | 45981 | |
Reply to Platonism
Here’s a reply to a comment
that was left about my recent post “Platonism”. The discussion is
getting long and involved, so I thought I’d make a new post. And to
anonymous (the poster), don’t worry about the comment length. I’m only
posting anew to draw attention to the interesting discussion.
... | 4 | [
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-0.0220947265625,
0.03759765625,
0.0264892578125,
-0.0478515625,
0.029052734375,
-0.0023956298828125,
-0.01531982421875,
-0.0615234375,
-0.0224609375,
0.0169677734... | 45,982 | 45982 | |
Irreducible Quadratic Factors (Partial Fractions)
February 22nd 2009, 10:06 PM
wyhwang7
Irreducible Quadratic Factors (Partial Fractions)
Hello, I've been reading the examples in my text over and over and I'm having trouble solving problems with irreducible quadratic factors.
The problem: Find the constants... | 4 | [
-0.01361083984375,
0.011474609375,
0.04296875,
0.0791015625,
0.0302734375,
0.07958984375,
-0.0625,
-0.0096435546875,
-0.003997802734375,
-0.0439453125,
0.043701171875,
-0.12060546875,
-0.0037841796875,
0.00439453125,
-0.0301513671875,
0.06298828125,
0.043701171875,
0.0174560546875,... | 45,983 | 45983 | |
HELP! Inverse Fuction
September 9th 2008, 03:03 PM
asweet1
HELP! Inverse Fuction
The cost of producing x air conditioners is c=g(x)=900+100x. Find a formula for the inverse function g^-1(c). I don't understand inverse functions at all. Please help me.
September 9th 2008, 03:10 PM
skeeter
Quote:
let ... | 4 | [
-0.0859375,
0.03662109375,
0.033447265625,
-0.005096435546875,
0.00897216796875,
-0.028076171875,
0.022216796875,
0.0625,
-0.05419921875,
0.040771484375,
0.059326171875,
-0.0211181640625,
0.0185546875,
-0.0014495849609375,
-0.06396484375,
0.055419921875,
-0.0269775390625,
-0.001968... | 45,984 | 45984 | |
ln convergence question
$\sum_{1}^{\infty}\frac{ln k}{k\sqrt {k}}$ how to shpw if it converges or diverges
but i have trouble with the integral lnk=t 1/k=dt but in the denominator another sqrt(k)
You need to use integration by parts with $\displaystyle u = x^{-\frac{1}{2}}$ and $\displaystyle dv = \frac{\ln{x}}{x}\,d... | 4 | [
0.01495361328125,
-0.0673828125,
0.040771484375,
-0.0020599365234375,
0.025634765625,
-0.095703125,
-0.0028228759765625,
-0.018310546875,
0.040283203125,
-0.01031494140625,
-0.03271484375,
0.01220703125,
0.06982421875,
-0.03564453125,
-0.09912109375,
-0.064453125,
0.044921875,
-0.0... | 45,985 | 45985 | |
Proof of Proposition 3.1
Proposition 3.1
.
Let Ω be a finite set of states of the world. Suppose that
i. Agents i and j have a common prior probability distribution μ(·) over the events of Ω such that μ(ω) > 0 for each ω ∈ Ω, and
ii. It is common knowledge at ω that i's posterior probability of event E is q[i](E) ... | 5 | [
-0.005126953125,
0.02587890625,
0.11376953125,
-0.0301513671875,
0.01806640625,
0.095703125,
0.11865234375,
0.0240478515625,
0.09130859375,
0.034423828125,
0.035888671875,
-0.0162353515625,
0.1064453125,
-0.01300048828125,
-0.003631591796875,
0.0849609375,
0.003662109375,
0.0520019... | 45,986 | 45986 | |
Matrix (I think) question
July 21st 2013, 09:12 AM #1
Matrix (I think) question
I'm reading and learning through a finals exam for what I will be learning next year (I'm usually a year ahead) and there's a question:
A). Find the transpose of the matrix A
B). Show that $A^{-1}\cdot A=A\cdot A^{-1}=I$
... | 4 | [
-0.062255859375,
-0.03369140625,
0.00830078125,
-0.002166748046875,
-0.02294921875,
-0.09814453125,
0.00213623046875,
-0.055419921875,
-0.032470703125,
0.044921875,
0.02001953125,
0.00860595703125,
0.027587890625,
-0.00909423828125,
-0.08154296875,
0.09619140625,
-0.0142822265625,
... | 45,987 | 45987 | |
The idea of a probability density function
An initial thought experiment
I'm thinking of a number, let's call it $X$, between 0 and 10 (inclusive). If I don't tell you anything else, what would you imagine is the probability that $X=0$? That $X=4$? Assuming that I don't
have any preference for any particular number, y... | 5 | [
-0.0478515625,
0.0390625,
-0.0299072265625,
-0.06298828125,
0.038818359375,
-0.021240234375,
0.1337890625,
0.04248046875,
0.0439453125,
-0.00347900390625,
0.00872802734375,
-0.021240234375,
0.035888671875,
0.060546875,
-0.01806640625,
-0.06689453125,
0.0615234375,
0.01318359375,
... | 45,988 | 45988 | |
gamma distribution 2
March 16th 2010, 04:54 PM #1
Junior Member
Joined
Oct 2009
Posts
33
gamma distribution 2
I had a similar problem and I was trying to solve this question based on reply (thank you so much!!) but im having a difficult time to do following question:
For Z distributed on R^3 with Z1... | 5 | [
-0.046875,
-0.037841796875,
-0.03173828125,
-0.00946044921875,
0.00604248046875,
-0.004974365234375,
0.1083984375,
-0.0011444091796875,
-0.005859375,
0.05078125,
0.05859375,
0.07080078125,
0.087890625,
0.02880859375,
-0.04833984375,
0.015380859375,
-0.01202392578125,
-0.01611328125... | 45,989 | 45989 | |
Measure question
May 7th 2012, 08:37 PM
Wowhapjs
Measure question
Assume $A_j,j\geq 1,j\in\Bbb N$ are measurable sets. Let $m \in N$, and let $E_m$ be the set defined as follows : $x \in E_m \Longleftrightarrow x$ is a member of at least $m$ of the sets $A_k$.
I wanna know how to prove that
1. $E_m$ ... | 5 | [
0.05517578125,
0.0303955078125,
0.03125,
0.033203125,
0.0030517578125,
0.09375,
0.1884765625,
0.0301513671875,
0.0167236328125,
0.009765625,
-0.016357421875,
0.00139617919921875,
0.032958984375,
-0.033447265625,
-0.043212890625,
0.0186767578125,
0.126953125,
0.00531005859375,
-0.... | 45,990 | 45990 | |
Implicit Differentiation
Posted by jasmineT on Saturday, February 18, 2012 at 10:05pm.
Use implicit differentiation to find the slope of the tangent line to the curve
y/x+6y=x^2–6 at the point (1,–5/31) .
Again i think i'm messing up with the algebra here. I used quotient rule to get
[(x+6y)(y')-(y)(1+6y')]/(x+6y)^... | 4 | [
-0.07568359375,
-0.06982421875,
0.02685546875,
0.041015625,
0.046142578125,
0.0020904541015625,
-0.027099609375,
-0.0084228515625,
-0.01007080078125,
-0.003936767578125,
0.09814453125,
0.033447265625,
-0.03125,
0.003997802734375,
0.02392578125,
0.07958984375,
-0.10107421875,
-0.028... | 45,991 | 45991 | |
Help with a proof involving images and intersections
November 29th 2010, 01:33 AM #1
Junior Member
Joined
Sep 2010
Posts
48
Help with a proof involving images and intersections
I have no idea where to even start on this proof. Any help would be greatly appreciated
(I apologize if this is difficult t... | 5 | [
0.00153350830078125,
0.059326171875,
0.083984375,
-0.019775390625,
0.03515625,
0.0286865234375,
0.150390625,
0.00689697265625,
-0.048095703125,
-0.058837890625,
-0.0223388671875,
-0.0615234375,
0.10009765625,
-0.01422119140625,
0.0081787109375,
0.10107421875,
-0.0201416015625,
-0.0... | 45,992 | 45992 | |
Ratioing Errors
Date: 01/07/2002 at 09:51:25
From: Rich Thomas
Subject: Ratioing errors
Hello.
I'm sure this is a daft question, but my maths is rusty and I cannot
be confident of my workings. The problem involves errors and ratioing.
I'm dealing with two 'elements', A and B. I have their values, and
their respect... | 5 | [
-0.01446533203125,
-0.03857421875,
0.002716064453125,
-0.00677490234375,
0.0137939453125,
-0.050048828125,
-0.060546875,
0.04345703125,
0.00897216796875,
-0.025146484375,
0.0262451171875,
-0.0289306640625,
0.095703125,
0.04443359375,
0.01031494140625,
0.0732421875,
-0.0289306640625,
... | 45,993 | 45993 | |
Problem regarding Taylor's Theorem
March 20th 2007, 12:12 PM #1
Member
Joined
Oct 2006
Posts
84
Problem regarding Taylor's Theorem
g(x) = sin(x) + cos(.5x) on (-4, 4)
Okay, so for the above expression, I have to:
a) Calculate an expression for the 5th derivative g^(5)(x).
b) Find a bound for... | 5 | [
-0.044189453125,
-0.000934600830078125,
0.095703125,
-0.0001277923583984375,
0.0189208984375,
-0.0322265625,
0.0311279296875,
-0.0022735595703125,
0.0002288818359375,
0.04052734375,
0.052734375,
-0.038330078125,
0.009765625,
-0.057373046875,
-0.078125,
0.005035400390625,
-0.016723632... | 45,994 | 45994 | |
Solving Diophantine Equations By Organized Thinking
Date: 11/25/2003 at 09:19:44
From: Linda
Subject: helping me and my girls to break down word problems
Laura is in charge of lighting. Each light fixture supplies exactly
1,000 watts of power to light the bulbs in the fixture. Laura can
use any combination of 150-w... | 5 | [
0.04150390625,
0.045654296875,
-0.04248046875,
0.0115966796875,
-0.04296875,
-0.033447265625,
0.041015625,
-0.0283203125,
-0.0830078125,
0.1259765625,
-0.00714111328125,
-0.035400390625,
0.0927734375,
0.0791015625,
0.02294921875,
0.16015625,
-0.1064453125,
-0.061279296875,
-0.097... | 45,995 | 45995 | |
the Chinese abacus
Home | Electronics | Toolbox | Gini and Karl's world | E-cards | Photos | Online-Shop
story time | science club | math blog | computer corner | penguin page | home
... | 4 | [
-0.0306396484375,
0.03759765625,
-0.023681640625,
-0.0218505859375,
-0.03857421875,
-0.08447265625,
0.025634765625,
-0.01104736328125,
0.02734375,
-0.0135498046875,
0.08740234375,
-0.000827789306640625,
-0.00628662109375,
-0.0023345947265625,
-0.08447265625,
0.047119140625,
0.0197753... | 45,996 | 45996 | |
Ratio test question
February 16th 2010, 12:21 AM #1
Member
Joined
Feb 2009
Posts
130
Ratio test question
hi everyone
im stuck with this question, need help to clarify..
Determine this series is absolutely convergent or diverges by using ratio test.
$\sum ^\infty_{n=1}$$\frac{(-1)^n e^\frac... | 5 | [
-0.052978515625,
0.00994873046875,
-0.05419921875,
-0.000728607177734375,
-0.052001953125,
-0.091796875,
-0.0556640625,
-0.0125732421875,
0.043701171875,
-0.078125,
0.0213623046875,
-0.0185546875,
0.02197265625,
0.0303955078125,
-0.005340576171875,
-0.09912109375,
0.046630859375,
-... | 45,997 | 45997 | |
Modeling Blood Flow in a Brain Tumor Treated Concurrently with Radiotherapy and Chemotherapy
Ranadhir Roy^1, , Daniel N Riahi^1
^1Mathematics Department, University of Texas-Pan American, Edinburg, Texas
Abstract
Blood flow through a tumor plays a critical role in tumor growth and cancer therapies. Hence, fluid dyn... | 4 | [
0.041259765625,
-0.050048828125,
-0.0228271484375,
-0.10205078125,
-0.0361328125,
-0.0751953125,
0.017333984375,
0.039794921875,
0.0771484375,
-0.01953125,
-0.060302734375,
0.0064697265625,
0.07421875,
0.07080078125,
-0.0986328125,
-0.033935546875,
-0.036865234375,
-0.013427734375,... | 45,998 | 45998 | |
Basis question
April 23rd 2009, 03:27 AM #1
Senior Member
Joined
Jul 2006
Posts
364
Basis question (Answer check please)
Two subspaces S and T of $R^4$ are spanned by {(15,1,0,1), (-1,15,0,1) } and { (2,0,1,0), (12, 46, 0, 4), (14, 46, 1, 4)} respectively. Find a basis {X} for $S\cap T$.
-----------... | 5 | [
-0.0225830078125,
0.01458740234375,
0.0078125,
-0.026123046875,
0.0361328125,
0.0196533203125,
0.09130859375,
-0.00445556640625,
-0.022216796875,
-0.048095703125,
0.00191497802734375,
-0.04345703125,
0.021484375,
0.0234375,
-0.13671875,
-0.0159912109375,
-0.02294921875,
-0.04296875... | 45,999 | 45999 |