content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Mast Kalandar
When a sphere (globe or ball) is turned about its centre a number of times, there is at least one point that starts and ends at the same place. This a consequence of the algebraic statment that a 3x3
orthogonal matrix with determinant has 1 as an eigenvector with eigenvalue 1. One of my students recently ... | 4 | [
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0.0029144287109375,
0.001678466796875,
-0.04296875,
-0.0869140625,
0.... | 34,800 | 34800 | |
finding the equation of the line
July 30th 2012, 06:37 AM #1
finding the equation of the line
find the equation of the line passing through the point of intersection of the lines x - y = 0 and 3x - 2y = 2 and satisfying the condition indicated: (without finding the intersection of the two
lines)
a. conta... | 4 | [
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-0.0... | 34,801 | 34801 | |
Exponential and Logarithmic Functions help!!!
October 24th 2007, 03:52 PM #1
Junior Member
Joined
Dec 2006
From
On Earth.
Posts
38
Exponential and Logarithmic Functions help!!!
Hi everyone!
I am currently having trouble understanding a couple parts of my homework. I filled in the rest but these ... | 4 | [
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0.008117675... | 34,802 | 34802 | |
Elementary Math Problem
March 23rd 2009, 11:36 AM #1
Newbie
Joined
Feb 2009
Posts
12
How many cubes are in the 10th collection of cubes in this sequence?
1st- 1 cube
2nd- 4 cubes
3rd- 10 cubes.....
l
l
l
10th- ? cubes
Any help appreciated!
Tetrahedral numbers
Hello ... | 4 | [
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Homework Help
Posted by fakaapo on Thursday, April 14, 2011 at 8:09am.
For the given linear prgramming problem, write down the objective function and the constraints.
Kris is trying to make his business more efficient by having a system of both large and small vans. He can spend no more than $100,000 for both type of... | 4 | [
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... | 34,804 | 34804 | |
Finding Pi: Buffon's Needle Method
Date: 1/31/96 at 19:45:10
From: Robert Garry
Subject: Calculating PI
Dr. Math,
For my Survey of Math class, the students are calculating the
value of PI. They have come up with several methods to do so, and
I was hoping to show them a surprising way using a needle and
parallel li... | 5 | [
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-0.0380859375... | 34,805 | 34805 | |
Real Analysis: Integrals
October 28th 2008, 09:28 AM #1
Junior Member
Joined
May 2008
Posts
70
Real Analysis: Integrals
Without evaluating the integral, how does one show that:
0 less than or equal to the integral from 0 to pi/6 sin(x) dx greater than or equal to pi/12?
For $x\in [0,\pi/6]$ we h... | 5 | [
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Homework Help
Posted by David on Saturday, July 27, 2013 at 4:33pm.
Solve the DE by using the Laplace transform:
x''+x=cos(3t), x(0)=x'(0)=0
• calculus - Steve, Saturday, July 27, 2013 at 6:03pm
L{x"} = s^2*F(s) - s*f(0) - f'(0)
= s^2*F(s)
so,
s^2 F(s) + F(s) = s/(s^2+9)
F(s) = s/((s^2+9)(s... | 5 | [
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calculus for areas
April 13th 2010, 06:30 AM #1
Member
Joined
Feb 2010
Posts
93
calculus for areas
Hi:
I have this question that follows. It is in a differentiation section of the book. It asks to find area and value of x. But I thought when I differentiate it is to find the gradient of a tangent
... | 5 | [
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Calculus Problems Multiple Choice
April 19th 2006, 09:08 PM #1
Junior Member
Joined
Jan 2006
From
Oakland
Posts
55
22. The base of a solid is the region enclosed by the ellipse 4x^2+y^2=1. If all plane cross sections prependicular to the x-axis are semicircles, the its volume is
(A) Pi/3
(B)... | 5 | [
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Two substitution integral evaluation questions
February 16th 2009, 11:29 AM #1
Member
Joined
Oct 2008
Posts
242
Two substitution integral evaluation questions
I've attached a picture, there's a few types of problems I'm having trouble with. I can easily solve simple integral problems involving substituti... | 5 | [
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Exponential and Logarithm Equations
March 30th 2011, 08:21 PM #1
Junior Member
Joined
Jul 2010
Posts
25
Exponential and Logarithm Equations
Hello everybody,
I'm having trouble with this problem.
$3*2^x^-^2 = 6-2^x^-^2$
This homework question has me completely stumped, my teacher said that ... | 4 | [
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Nonlinear Oscillations
December 29th 2009, 06:09 AM
Showcase_22
Nonlinear Oscillations
Hi guys! I think I posted a question similar to this before. I think i've made some progress in solving questions of this type, but i'm still getting stuck on bits of it.
Quote:
Find the general solution to $\ddot{x... | 5 | [
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maximization problem
March 4th 2009, 05:18 PM #1
Newbie
Joined
Mar 2009
Posts
20
maximization problem
Please help on this one....
Don't really understand the problem. What they ask me to do.
It says..
Solve the following maximization problem:
max xy^(1\2)
x,y
subject to X^... | 5 | [
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Homework Help
Posted by Kalen on Thursday, May 17, 2012 at 6:49pm.
write y=sinx-cosx in the form y=ksin (x+a), where the measure of a is in radians. answers: sqrt2sin (x+3pi/4), sqrt2sin (x+5pi/4), sqrt2sin (x+pi/4), or sqrt2sin (x+7pi/4) ...?
• trig - Reiny, Thursday, May 17, 2012 at 7:03pm
ksin(x+a) = k(sinx... | 4 | [
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pseudo inverse of a matrix
January 21st 2011, 08:43 PM
nadia321
pseudo inverse of a matrix
Hi
Let A be an $m \times n$ matrix. An $n\times m$ matrix $A{^\oplus}$ is a pseudoinverse of A if there are matrices $U \ and\ V$ such that
$AA^{\oplus} A= A,$
$A^{\oplus}=UA^{\oplus}=A^{T}V.$
Show that $A... | 4 | [
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One confusing step in a solution
September 15th 2010, 05:03 PM #1
Newbie
Joined
Aug 2010
Posts
4
One confusing step in a solution
Hi,
I'm trying to understand the solution to a problem, and I get most of it, but there is one step in the algebra I can't quite follow. Please help!
It looks like t... | 4 | [
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... | 34,816 | 34816 | |
integration, area and volume
July 11th 2009, 05:34 PM #1
Junior Member
Joined
Jan 2009
Posts
68
integration, area and volume
a) Find the area enclosed between y=1/sqrt(1-x^2), the x axis and the lines x=0 and x=1/2.
integrating y I got [sin^-1(x)] between limits 1/2 and 0 which equals
=[sin^-1(1... | 5 | [
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Extremal Combinatorics III: Some Basic Theorems
Posted on September 28, 2008 by Gil Kalai
Shattering
Let us return to extremal problems for families of sets and describe several basic theorems and basic open problems. In the next part we will discuss a nice proof technique called “shifting” or
“compression.”
The Sa... | 5 | [
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Simple fractional equation
May 4th 2009, 11:44 AM #1
Newbie
Joined
May 2009
Posts
2
So here's the equation.
Solve:
$7 \frac {1}{2}x -\frac {1}{2}x = 3 \frac {3}{4} + 39$
I know x = 12 because of the answer key, but I keep getting the wrong answer. I really need a step-by-step explanation.
... | 4 | [
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the encyclopedic entry of set going
In
mathematics
, a
level set
of a
real
-valued
function f
of
n
variables is a set of the form
{ (x[1],...,x[n]) | f(x[1],...,x[n]) = c }
where
c
is a constant. That is, it is the set where the function takes on a given constant value.
For example, given a specific ... | 4 | [
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Circulation
May 2nd 2009, 11:43 AM
Apprentice123
Circulation
Calculate the circulation of vector field F arrond $\alpha$
1) $F(x,y) = (x-y)i + (x+y)j$ and $\alpha$ is the closed polygonal ABCDA traveled once in anticlockwise joining the points $A(1,0)$, $B(1,2)$, $C(0,2)$ and $D(0,1)$.
My solution:
... | 5 | [
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0.05078125,
-... | 34,821 | 34821 | |
direct proof or contraposition?
June 24th 2007, 12:25 PM
Discrete
direct proof or contraposition?
I am asked to proof this conjecture:
If x is rational and x is not equal to 0, then 1/x is rational. How do I proof this? Should I use direct or contraposition proof? I just learned about this stuff and I don't... | 4 | [
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0.09716796875,... | 34,822 | 34822 | |
Derivate of implicit function
December 16th 2009, 07:02 AM #1
Junior Member
Joined
Nov 2009
Posts
29
Derivate of implicit function
Hy.
I have question how can i make derivate from implicit function i have lost at the begining.
parameters of this function are
$a=7;\ b=5;\ c=3;\ d=-7;\ e=-5;... | 4 | [
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Navy Electricity and Electronics Training Series (NEETS)
NEETS Module 9 — Introduction to Wave- Generation and Wave-Shaping
Pages
i - ix
,
1-1 to 1-10
,
1-11 to 1-20
,
1-21 to 1-30
,
1-31 to 1-40
,
1-41 to 1-52
,
2-1 to 2-10
,
2-11 to 2-20
,
2-21 to 2-30
,
2-31 to 2-38
,
3-1 to 3-10
,
3-11 to 3-... | 5 | [
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double integrals in polar coordinates
December 8th 2010, 08:26 PM #1
Newbie
Joined
Dec 2010
From
Tennessee
Posts
4
double integrals in polar coordinates
I have to use a double integral in polar coordinates to find the area of the region inside the circle x^2 + y^2 = 4 and to the right of the line x =... | 5 | [
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-0.010498046875,
-0.07... | 34,825 | 34825 | |
finite-dimensional subspaces
May 12th 2008, 07:12 AM #1
Newbie
Joined
May 2008
Posts
11
finite-dimensional subspaces
Hi,
Have been trying to understand linear Algebra for a month now. Am unable to solve this:
If U,V,W are finite-dimensional subspaces of a real vector space, show that
dim U + ... | 4 | [
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0.01275634765625,
-0.083984375,
-0.03027343... | 34,826 | 34826 | |
Inverse Laplace
October 15th 2009, 07:48 AM
Chris0724
Inverse Laplace
hi,
Inverse laplace
---(s + 9 )
------------
s^2 + 6s+ 9
-----(s + 3 )
--------------- + .........
(s + 3 )^ 2 + 4
{ e^-3t } * Inverse laplace { s / (s+4) } + .......
I have problem understand this st... | 5 | [
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0.0103759765625,
-0.00... | 34,827 | 34827 | |
Problem 15
January 15th 2007, 05:35 PM #1
Global Moderator
Joined
Nov 2005
From
New York City
Posts
10,616
Thanks
9
Problem 15
Behold! A plain simple isoseles triangle appears besides you. Frozen in a white boring background this triangle is full of supprises. You must locate the angle by the red... | 5 | [
-0.06298828125,
0.11083984375,
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0.036865234375,
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0.04443359375,
0.0064697265625,
0.00927734375,
-0.00262451171875,
... | 34,828 | 34828 | |
math college algebra
Posted by Nicole on Monday, January 23, 2012 at 12:46pm.
write the quadratic function f(x)-x^2+14x-50 in the form f(x)=a(x-h)^2+k by completing the square and graph
• math college algebra - Reiny, Monday, January 23, 2012 at 12:59pm
I don't know if that is
f(x) = - x^2 ...
or
f... | 4 | [
-0.003814697265625,
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0.0966796875,
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0.06103515625,
-0.076171875,
-0.05419921... | 34,829 | 34829 | |
Backward Euler Method
May 23rd 2009, 10:04 AM
damaged69
Backward Euler Method
Hi,
Can someone please tell me how to use the Backward Euler Method (BEM) manually like the step by step process for the equation, in determining it with a step size of say 0.1 to find the y1 when
the inital value of y0 = 2:
... | 5 | [
-0.08740234375,
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0.09033203125,
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0.010986328125,
-0.0927734375,
-0.031494140625,
0.037353515625,
-0.055419921875,
0.011352... | 34,830 | 34830 | |
Four segments, find angle?
December 22nd 2007, 07:36 AM
sjcomp
Four segments, find angle?
Given the geometry shown below I need to find angle r. I now all the sides (a,b,c,d). I do NOT know what angle K is. Here is the geometry setup:
http://img443.imageshack.us/img443/4301/geomml7.png
I approached this... | 4 | [
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0.059814... | 34,831 | 34831 | |
showing two distribution functions identical
June 11th 2011, 10:35 PM #1
showing two distribution functions identical
Let $X_1,X_2$ be two i.i.d. $Exp(\lambda)$ random variables and $R$ is a $Ber(\frac{1}{2})$ variable. How to show that the distribution functions of $X_1-X_2$ and $RX_1-(1-R)X_2$ are identical?
... | 5 | [
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Poisson Process Question
November 16th 2008, 03:58 PM #1
Poisson Process Question
Assume that you perform and experiment where the outcomes occur according to a Poisson Process with rate 4 per minute, and that the experiment is complete once you observe 250 outcomes. Calculate
the mean time and variance time ... | 5 | [
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-0.048339... | 34,833 | 34833 | |
word problem - quadratics
July 12th 2008, 03:04 PM #1
Newbie
Joined
Jul 2008
Posts
12
word problem - quadratics
Aaaalright, apparently I'm supposed to solve this using the quadratic formula (ps: you dont have to run through the steps of the formula with me, i'm good with that part)
Here is the word ... | 4 | [
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... | 34,834 | 34834 | |
Bound of error(Lagrange Interpolation)
June 15th 2009, 02:10 AM #1
Bound of error(Lagrange Interpolation)
Hello everybody
Given the Lagrange polynomial with the table:
$\begin{tabular} {|c|c|c|c|}<br /> \hline<br /> x & 8.3 & 8.6 & 8.7 \\<br /> \hline<br /> f(x) & 17.56492 & 18.50515 & 18.32091 \\<br />... | 4 | [
0.005126953125,
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0.125,
-0.006072998046875,
0.004638671875,
0.02392578125,
-0.014404296875,
0.059326171875,
-0.050048828125,
-0.032958984375,
0.0079345703125,
-0.0235595703125,
-0.0183... | 34,835 | 34835 | |
Homework Help
Posted by Edward on Friday, October 18, 2013 at 3:14pm.
A street light is mounted at the top of a 19-ft-tall pole. A man 5.5 feet tall walks away from the pole with a speed of 14 ft/s along a straight path. How fast is the tip of his shadow moving when he
is 100 feet from the pole?
• math - Steve, Fri... | 5 | [
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0.045166015625,
-0.021... | 34,836 | 34836 | |
Homework Help
Posted by Anonymous on Thursday, December 8, 2011 at 9:49pm.
In circle O, diameter RS has endpoints R(3a,2b-1) and S(a-6,4b+5). Find the coordinates of point O in terms of a and b. Express your answer in simplest form.
• Geometry - Steve, Thursday, December 8, 2011 at 11:06pm
we know that the end... | 4 | [
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-... | 34,837 | 34837 | |
Math Help
April 17th 2009, 01:51 PM #1
trig id
Hey all, I was wondering if someone can walk me through this one:
[cot^2(B) - cos^2(B)]/[csc^2(B) -1]
My solution is as follows:
[cot^2(B)/-sec^2(B)] - cos^2(B)/-sec^2(B)
-cos^4(B)/sin^2(B) +1
and now i am a bit stuck. the correct answer is c... | 4 | [
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0.09765625,
-0.006500244140625,
0.03076171875,
-0.0205078125,
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0.0625,
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0.09521484375,
0.0361328125,
0.080078125,
-0.00189971923828125,
0.019409179687... | 34,838 | 34838 | |
How is this reduced ech form?
December 4th 2011, 03:35 AM #1
Member
Joined
Nov 2009
Posts
171
How is this reduced ech form?
1 1 0 l 9
0 1 1 l 7
0 0 0 l 0
Basically this is in a problem that says use Gauss jordan elination to solve the following system:
x1 + x2 = 9
x2 + x3 = 7
2x... | 5 | [
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-0.07373046875,
-0.061767... | 34,839 | 34839 | |
Interior/Closure
May 4th 2009, 03:13 PM #1
Interior/Closure
Is this correct?
Prove that $\overline{A} = X\setminus int(X\setminus A)$
Is it equivalent to prove that $X\setminus\overline{A} = int(X\setminus A)?$
If so then heres my proof...
Let $x \in X$\ $\overline{A}$, then $B(x,r) \cap X$\ $... | 5 | [
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-0.0235595703125,
0.032470703125,
-0.0... | 34,840 | 34840 | |
Demand Equation; Domain
November 4th 2012, 12:00 PM #1
Newbie
Joined
Nov 2012
From
United States
Posts
1
Demand Equation; Domain
The price, p and the quantity x sold of a certain product ovey the demand equation
x=10000 - 200p
A: Find a model that expresses the revenue R as a function of p
... | 4 | [
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0.0201416015625,
0.0625,
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0.0947265625,
0.0830078125,
0.031982421875,
0.0277099609375,
-0.0115966796875,
-0.01... | 34,841 | 34841 | |
Stream Cryptosystems
The Blum-Blum-Shub (BBS) pseudorandom bit generator.
See the original paper by Blum, Blum and Shub [BlumBlumShub1986]. The BBS algorithm is also discussed in section 5.5.2 of [MenezesEtAl1996].
INPUT:
□ length – positive integer; the number of bits in the output pseudorandom bi... | 5 | [
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0.00982666015625,
-0.03369140625,
-0.0230712890625,... | 34,842 | 34842 | |
open and closed sets
October 26th 2009, 06:57 AM #1
Junior Member
Joined
Oct 2009
Posts
26
open and closed sets
In this problem you will prove that the only subsets of R that are both open and closed are R and the empty set. Let E be a nonempty subset of R, and assume that E is both open and closed. Sinc... | 4 | [
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0.02734375,
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0.0048828125,
0.09716796875,
-0.06982421875,
0.006744384765625,
-0.070312... | 34,843 | 34843 | |
cauchy-sequenze
November 10th 2008, 07:29 AM
Rapha
cauchy-sequenze
Hello
It is $<u,v> = \int^2_0 \overline{u}(x) v(x) dx \ \ \forall u,v \in C[0,2]$ (defines a dot product)
Show that $f_n$ is a cauchy-sequenze
(field) norm: $||u||_2 = \sqrt{<u, u>} \ \ \forall u \in C[0,2]$
$f_n(x)=\begin{case... | 5 | [
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-0.00014972686767578125,
... | 34,844 | 34844 | |
algebra 2 help please would appreciate
Posted by lisa on Saturday, November 9, 2013 at 9:45am.
3+(2x/x+4) divide x/x+4
please simplify the complex fraction thank you show work
• algebra 2 help please would appreciate - Bosnian, Saturday, November 9, 2013 at 9:54am
2 x / x = 2
x / x = 1
[ 3 + ( 2 x ... | 4 | [
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Two-Dimensional Einstein Manifolds in Geometrothermodynamics
Advances in High Energy Physics
Volume 2013 (2013), Article ID 967618, 6 pages
http://dx.doi.org/10.1155/2013/967618
Research Article
Two-Dimensional Einstein Manifolds in Geometrothermodynamics
^1Instituto de Ciencias Nucleares, Universidad Nacional Autón... | 4 | [
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0.007598876953125,
... | 34,846 | 34846 | |
Help with reduction formula
February 2nd 2008, 02:03 PM #1
Newbie
Joined
Feb 2008
Posts
3
Help with reduction formula
Hi, i want to have a reduction formula for this problem i hope that you can help me with this
J[k] = int((x^2-121)^k, x = 0 .. 11)
thanks in advance
Assuming you're familiar... | 5 | [
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0.009521484375,
-0.0303955078125,
-0.0162353515625,
0.061767578125,
0.06... | 34,847 | 34847 | |
How many different languages?
August 21st 2011, 02:00 AM #1
How many different languages?
A company specializing in international trade has 70 employees. For any two employees A and B, there is a language that A speaks but B does not, and also a language that B speaks but A does not.
At least how many differe... | 5 | [
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0.0006866455078125,
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0.052978515625,
0.017822265625,
0.003997802734375,
-0.05078125,
-0.024... | 34,848 | 34848 | |
A Diameter problem (7): The Best Known Bound
Posted on December 1, 2008 by Gil Kalai
Our Diameter problem for families of sets
Consider a family $\cal F$ of subsets of size d of the set N={1,2,…,n}.
Associate to $\cal F$ a graph $G({\cal F})$ as follows: The vertices of $G({\cal F})$ are simply the sets in $\ca... | 5 | [
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0.02490234375,
... | 34,849 | 34849 | |
Linear difference equations
March 30th 2009, 09:01 AM #1
Newbie
Joined
Jan 2009
Posts
11
Linear difference equations
there are two questions in the attachment with the correct answers.
i have worked through the questions, to my knowledge, however seem to be only a few steps short of reaching the act... | 5 | [
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0.040771484375,
0.0625,
-0.040771484375,
... | 34,850 | 34850 | |
scipy.signal.welch
scipy.signal.welch¶
scipy.signal.welch(x, fs=1.0, window='hanning', nperseg=256, noverlap=None, nfft=None, detrend='constant', return_onesided=True, scaling='density', axis=-1)[source]¶
Estimate power spectral density using Welch’s method.
Welch’s method [R145] computes an estimate of the ... | 5 | [
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-0.0556640625,
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0.001739501953125,
-0.0267333984375,
0.00360107421875,
-0.019287109375,
-0.01855468... | 34,851 | 34851 | |
Homework Help
Posted by Sahana E. on Thursday, September 29, 2011 at 5:32pm.
Determine the coordinates of the endpoint of a segment CE with one endpoint at C(3,10) and a midpoint at (-1,-6).
Disclaimer: This is 10th grade geometry.
• Math - Steve, Thursday, September 29, 2011 at 5:52pm
The midpoint is halfway... | 4 | [
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-0.115234375,
-0.0131... | 34,852 | 34852 | |
Percentage and ratio using integers help
May 1st 2013, 01:54 AM #1
Newbie
Joined
May 2013
From
Wales
Posts
3
Percentage and ratio using integers help
Currently studying mathematics for engineers third edition given i havnt done maths for about 9 years its not going to bad but im stuck on theses quest... | 4 | [
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-0.027099609375,
-0.029296875,... | 34,853 | 34853 | |
Implicit equation issue..
August 10th 2009, 08:23 AM #1
Member
Joined
Nov 2007
Posts
100
Implicit equation issue..
4. Differentiate the implicit equation of the hyperbola 4x^2 - 3y^2 = 24 to find the equation of the normal at the point (3, -2). Find the y-coordinate of the point where the normal meets th... | 4 | [
0.03076171875,
-0.06298828125,
0.012939453125,
0.0279541015625,
0.0301513671875,
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-0.037841796875,
0.060791015625,
-0.00074005126953125,
0.01220703125,
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0.0052490234375,
0.014404296875,
-0.01507568359375,
0.05908203125,
0.083984375,
-0.0458984375,
-0.0532... | 34,854 | 34854 | |
vector space proofs
October 18th 2009, 03:21 AM #1
Newbie
Joined
Oct 2009
Posts
2
vector space proofs
I'm taking a linear algebra course and I haven't needed to do proofs before this class (I'm an EE major and we take "special" math for Calc and Diff Eq). I could really use some help on the
proofs fo... | 4 | [
-0.05810546875,
-0.044677734375,
-0.06884765625,
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-0.056884765625,
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-0.0130615234375,
-0.0240478515625,
0.08447265625,
0.00177764892578125,
... | 34,855 | 34855 | |
Calculation for Richmond County, NC
4-Bedroom Rent Calculation for Richmond County, NC
The 4-Bedroom FMR is computed from a 2000 Census Base 4-Bedroom Rent and updated using the same update factors derived for the 2-Bedroom FMR. The 4-Bedroom FMR may be separately rebenchmarked from
the 2-Bedroom FMR by a special RDD... | 4 | [
0.0830078125,
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0.006011962890625,
0.0751953125,
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0.0189208984375,
-0.01055908203125... | 34,856 | 34856 | |
Calculating Margin of Error Probability
November 18th 2008, 09:19 PM #1
Junior Member
Joined
Jul 2008
Posts
51
Calculating Margin of Error Probability
Here is the question:
The monthly expenditures on food by single adults in Missoula are normally distributed with a mean of $410 and a SD of $70. Wha... | 5 | [
0.0859375,
0.0986328125,
0.0225830078125,
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0.05126953125,
-0.028564453125... | 34,857 | 34857 | |
Identifying equation type...
February 11th 2010, 08:03 AM #1
Member
Joined
Sep 2009
Posts
82
Identifying equation type...
Hi, I need help identifying what type of differential equation the following are. Once I know the type, I'll be able to solve them. Also, if the equations are not exact as given, we a... | 4 | [
-0.0712890625,
-0.08203125,
0.017822265625,
0.047607421875,
0.05126953125,
-0.025634765625,
0.00262451171875,
-0.01361083984375,
-0.05859375,
0.00897216796875,
0.1474609375,
-0.057373046875,
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0.049072265625,
0.060791015625,
0.042236328125,
-0.080078125,
-0.035888671... | 34,858 | 34858 | |
Random Walks
Random Walks and Heaps of Cycles Philippe Marchal
Département de mathématiques et applications, École normale supérieure (France)
... | 4 | [
-0.05712890625,
-0.0005340576171875,
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0.09375,
0.015625,
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-0.0419921875,
0.01458740234375,
0.... | 34,859 | 34859 | |
Brazilian Journal of Physics
Services on Demand
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Print version ISSN 0103-9733
Braz. J. Phys. vol.39 no.4 São Paulo Dec. 2009
http://dx.doi.org/10.1590/S0103-97332009000600016
Heisenberg spin textures on a cylinder with topological defects
L.A.N. de Paula^*
Department of ... | 4 | [
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0.0004... | 34,860 | 34860 | |
Need Help With Hypothesis Test
March 28th 2011, 09:28 AM #1
Newbie
Joined
Dec 2009
Posts
5
Need Help With Hypothesis Test
Let's just say it's been a while since college, and I can't remember everything about hypothesis testing, and now I'm faced with a situation at work where I need to refresh some of th... | 4 | [
0.0303955078125,
0.059326171875,
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-0.015869140625,
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0.04638671875,
0.0205078125,
-0.02136230... | 34,861 | 34861 | |
cartesian product proofs
October 29th 2009, 09:45 AM #1
Member
Joined
Mar 2009
Posts
84
cartesian product proofs
A X (B U C)= (A X B) U (A X C)
proof:
Assume (x,y) is an element of A X (B U C). This means x is an element of A and y is an element of B or y is an element of C. Since (x,y) can be x... | 4 | [
-0.04541015625,
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0.0732421875,
0.03125,
0.03466796875,
0.0947265625,
-0.047607421875,... | 34,862 | 34862 | |
Cohomology of twisted holomorphic forms on Fano threefolds
up vote 5 down vote favorite
1
Given a Fano threefold $X$, its index $ind(X)$ is the largest integer $r$ such that there exists a divisor $H$ such that $rH \cong -K_X$. Let $\mathcal{L}$ be the associated (ample) line bundle and
define the twisted forms $\Omeg... | 5 | [
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0.04248046875,
-0.126953125,
-0.015869140625,
-... | 34,863 | 34863 | |
Another Unif. Cont.
February 2nd 2010, 06:18 AM #1
Newbie
Joined
Jan 2010
Posts
10
Another Unif. Cont.
Prove or disprove (by counterex.) $f(x) = xlog(\frac{1}{x})$ is unif. cont. on (0,1) and prove or disprove $f(x) = \frac{cosx}{mx+b}$ is unif. cont. on (0,1) for all nonzer0 $m,b \in \mathbb{R}$
So... | 4 | [
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... | 34,864 | 34864 | |
Applications of series and sequences (Superannuation, repayments)
July 26th 2008, 10:30 PM
Misa-Campo
Applications of series and sequences (Superannuation, repayments)
Question: At the beginning of each year, Sarah will deposit $1000 in a fund paying 10% each year compound interest:
i) What will be the valu... | 4 | [
-0.0252685546875,
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0.00004363059997558594,
0.07958984375,
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0.0296630859375,
-0.087890625,
0.0235595703125,
-0.06298... | 34,865 | 34865 | |
Is my math correct?
Posted by Henri on Monday, April 20, 2009 at 5:09am.
Find the Inside diameter(d) and outside diameter(D) of a hollow shaft given:
Power transmitted by shaft=1400kW
Shaft speed=45 RPM
Angle of twist on shaft=1 degree
Shaft lenght(L)=25D
Assume d=0.6D
Modulus of Rigidity(G)=81.75GPa
My answer:... | 5 | [
-0.0208740234375,
0.057373046875,
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-0.058837890625,
-0.07568359375,
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0.1044921875,
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0... | 34,866 | 34866 | |
De Moivre's Theorem
August 19th 2012, 07:53 PM
ok59
[Solved] De Moivre's Theorem
Please help me solve this problem.
if a=cos2alpha + isin2alpha
b=cos2beta + isin2beta
prove that,
a-b / a+b = itan (alpha-beta)
August 19th 2012, 08:15 PM
richard1234
Re: De Moivre's Theorem
Assuming "2alph... | 5 | [
-0.07470703125,
0.1064453125,
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0.01953125,
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0.00090789794921875,
0.03759765625,
0.068359375,
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0.0400390625,
0.087890625,
-0.00689697265625,
-0.06689453125,
-0.004760742... | 34,867 | 34867 | |
how do you find row echelon form using TI calc?
First, write it in matrix format using the coefficients.
$\left[\begin{array}{ccc|c}1&5&6&10\\3&15&-2&9\\5&12&-9&5\end{array}\right]$
The idea is to use elementary row operations to hammer it into the form:
$\left[\begin{array}{ccc|c}1&0&0&a\\0&1&0&b\\0... | 5 | [
-0.099609375,
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0.055908203125,
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0.013427734375,
-0.076171875,
-0.025634765625,... | 34,868 | 34868 | |
Homework Help
Posted by No Name on Thursday, November 17, 2011 at 12:58pm.
Determine an appropriate linear approximation of the function f(x)= the square root of x and use it to approximate the square root of 24.2. Write your answer in decimal form
• calculus - bobpursley, Thursday, November 17, 2011 at 1:25pm
... | 4 | [
-0.0211181640625,
0.000621795654296875,
0.078125,
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0.10791015625,
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0.087890625,
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0.06689453125,
-0.01483154296875,
0.0274658203125,
-0.02685546875,
-0.0405... | 34,869 | 34869 | |
Chaotic quadratic maps
Fig.1 illustrates stretching and folding transformations for the quadratic maps f[c] (for example the Myrberg-Feigenbaum point c = -1.401155 is chosen). The segment I[c] = [-x[2 ], x[2]] is mapped
into itself (here x[2] = 1/2 + (1/4 - c)^1/2 is the right repelling fixed point). Points outside ... | 4 | [
-0.042236328125,
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0.0196533203125,
0.06591796875,
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0.0185546875,
-0.01190185546875,
-0.... | 34,870 | 34870 | |
Discrete Math
Posted by Martin on Tuesday, November 1, 2011 at 11:54am.
How many ways can you get a bunch of 4 books to give a friend if you have 30 books (15 novels, 10 history book and 5 math books)?
• Discrete Math - MathMate, Tuesday, November 1, 2011 at 4:41pm
Without any constraints, you have 30 to choos... | 4 | [
0.002960205078125,
-0.0245361328125,
-0.0216064453125,
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0.005584716796875,
0.035400390625,
0.1103515625,
-0.0172119140625,
0.01275634765625,
0.047119140625,
0.05029296875,
-0.028076171875,
0.034912109375,
-0.10791015625... | 34,871 | 34871 | |
IWillTry.org
Purpose
The purpose of this experiment is to determine your vehicle’s drag coefficient Cd and coefficient of rolling resistance Crr. This is done by measuring your vehicle’s speed as a function of time while
coasting in neutral (also known as a coast down test).
Why would you want to know Cd and Crr for ... | 4 | [
-0.0390625,
0.07666015625,
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0.0228271484375,
0.020751953125,
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0.06982421875,
-0.05615234375,
-0.0162353515625,
0.00762939453125,
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0.0306396484375,
-0.0086669921875,
-0.080078125,
-0.033203125,
0.07861328125,
0.050048828125,
-0... | 34,872 | 34872 | |
trapezoid
Cut off thetwo right triangles of the trapezium (see attachment) Then you know (A) $\dfrac hx=\tan(72^\circ)$ ........ and ........ (B) $\dfrac hy = \tan(68^\circ)$ According to my sketch you can see
that $x+y=8~\implies~y=8-x$ Solve the equations (A) and (B) for h and substitute (8-x) instead of y: $x\tan(72... | 4 | [
0.030517578125,
0.1279296875,
-0.00567626953125,
0.037353515625,
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0.080078125,
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0.00970458984375,
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0.00193023681640625,
0.09912109375,
0.036865234375,
-0.07275390625,
-0.0187... | 34,873 | 34873 | |
Some sort of geometric distribution with no replacement.
May 29th 2010, 10:34 AM
zh305
Some sort of geometric distribution with no replacement.
Can any one help with the following problem please:
There are 237 snake in a pit, a head and a tail are chosen at random and the head made to bite the tail. If the ... | 5 | [
-0.0167236328125,
0.047119140625,
0.01470947265625,
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0.04833984375,
-0.0267333984375,
-0.023681640625,
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0.0771484375,
0.03125,
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-0.0162353515625,
-0.0267333984375,
-0.... | 34,874 | 34874 | |
Homework Help
Posted by Denise on Sunday, July 24, 2011 at 5:28pm.
Find all solutions in the interval [0, pi], 2sec^2x+tan^2x-3=0
• pre cal 2 - Reiny, Sunday, July 24, 2011 at 6:26pm
2sec^2x+tan^2x-3=0
2/cos^2x + sin^2x/cos^2x - 3 = 0
multiply by cos^2x
2 + sin^2x - 3cos^2x = 0
2 + (1 - cos^2x)... | 4 | [
-0.044189453125,
-0.0107421875,
0.01348876953125,
0.053466796875,
-0.0224609375,
0.07373046875,
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0.0050048828125,
0.051025390625,
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0.0654296875,
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0.04296875,
-0.0390625,
-0.01361083984375,
-0.053710937... | 34,875 | 34875 | |
Brazilian Journal of Chemical Engineering
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Print version ISSN 0104-6632
Braz. J. Chem. Eng. vol.29 no.3 São Paulo July/Sept. 2012
http://dx.doi.org/10.1590/S0104-66322012000300020
... | 4 | [
-0.04736328125,
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0.03369140625,
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0.02734375,
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0.024658203125,
-0.08203125,
0.02978515625,
-0.0761... | 34,876 | 34876 | |
'Work' Word Problems Made Easy
Author Message
TAGS:
rrsnathan
Manager Re: 'Work' Word Problems Made Easy [#permalink] 11 Aug 2013, 00:09
Joined: 30 May 2013 Hi,
Posts: 192 ... | 4 | [
-0.0250244140625,
0.09326171875,
-0.0211181640625,
-0.0032196044921875,
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0.00154876708984375,
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0.047607421875,
-0.024902... | 34,877 | 34877 | |
Homework Help
Posted by Julia on Wednesday, March 6, 2013 at 10:27pm.
how do I solve for 16x^2+56x-120
• algebra I - Bosnian, Wednesday, March 6, 2013 at 10:34pm
In google type:
quadratic equation online
When you see list of results click on:
Free Online Quadratic Equation Solver:Solve by Quadrat... | 4 | [
-0.0556640625,
0.02685546875,
0.01019287109375,
-0.006927490234375,
-0.000331878662109375,
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0.0172119140625,
0.0084228515625,
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0.05712890625,
0.043212890625,
-0.01385498046875,
0.09521484375,
-0.0128... | 34,878 | 34878 | |
Math Graphing
Posted by Amy~ on Sunday, September 26, 2010 at 1:14am.
x^3 < 3x^2
would become x(x^2-3x)
then how would I graph this?
• Math Graphing - Reiny, Sunday, September 26, 2010 at 7:19am
x(x^2-3x) < 0
x^2(x-3) < 0
critical values of x=0 , x=3
on a number line, mark x=0 and x=3, splittin... | 4 | [
-0.03369140625,
-0.040283203125,
-0.0751953125,
0.0206298828125,
-0.02685546875,
-0.0546875,
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-0.019775390625,
0.0145263671875,
-0.006805419921875,
0.0252685546875,
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0.02099609375,
0.058837890625,
0.0869140625,
0.0206298828125,
0.00799560546875,
-0.... | 34,879 | 34879 | |
Finding the derivative using the limit defintion.
January 18th 2010, 10:05 AM #1
Junior Member
Joined
Nov 2009
Posts
50
Finding the derivative using the limit defintion.
Can you help me with this please:
Using delta/epsilon methods show from definitions that if f(x)= x^3-3x+6 then f`(2)=9.
Than... | 4 | [
-0.0172119140625,
-0.01544189453125,
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0.0322265625,
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-0.03857421875,
0.046142578125,
0.005096435546875,
-0.046875,
0.0129... | 34,880 | 34880 | |
Agent based modeling
From Scholarpedia
Filippo Castiglione (2006), Scholarpedia, 1(10):1562. doi:10.4249/scholarpedia.1562 revision #123888 [link to/cite this article]
Agent-Based Modeling (ABM), a relatively new computational modeling paradigm, is the modeling of phenomena as dynamical systems of interacting agent... | 4 | [
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0.0003185272216796875,
0.04052734375,
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0.08447265625,
0.0380859375,
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0.0034942626953125,
0.0412597... | 34,881 | 34881 | |
Check this proof on supremums?
May 5th 2013, 07:53 AM #1
Member
Joined
Apr 2010
Posts
116
Thanks
1
Check this proof on supremums?
This is from Fitzpatrick's Advanced Calculus. I am not very experienced with proofs so could someone tell me if this is a correct way of doing it? Thanks!
Claim: If ... | 4 | [
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0.1494140625,
0.006500244140625,
-0.0... | 34,882 | 34882 | |
Homework Help
Posted by Son on Wednesday, December 7, 2011 at 11:21pm.
Find the point on the graph of the function closest to the given point. Function f(x) = xsquared Point (2, 1/2)
• math - Steve, Thursday, December 8, 2011 at 11:54am
using distance from (2,1/2) to y=x^2,
d^2 = (x-2)^2 + (y-1/2)^2
=... | 5 | [
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-0... | 34,883 | 34883 | |
conditional expectations
September 30th 2009, 10:38 PM #1
Junior Member
Joined
Apr 2009
Posts
58
conditional expectations
Hi, can someone please explain to me how they got the answer to this
Question: Find E(X|Y) and E[X - E(X|Y)]^2. Let
$\left(\begin{array}{cc}X\\Y\end{array}\right)$ ~ $N( \lef... | 5 | [
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-0.034... | 34,884 | 34884 | |
Sketching graphs
August 20th 2009, 12:07 AM #1
Senior Member
Joined
Jul 2008
Posts
347
Hi guys
I've been doing revision for yearlies and I've been having difficulties figuring out these questions:
1) Sketch the graph of the periodic function such that f(x) = x for – 1 < x ≤ 1 where the period of... | 4 | [
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Chemical Equilibrium Examples II
Technical Tutoring Home · Site Index · Advanced Books · Speed Arithmetic · Math Index · Algebra Index · Calculus Index · Trig Index · Chemistry Index · Gift Shop · Harry Potter DVDs, Videos, Books,
Audio CDs and Cassettes · Lord of the Rings DVDs, Videos, Books, Audio CDs and Cassett... | 5 | [
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0.005462646484375,
0.04833... | 34,886 | 34886 | |
GCSE Maths
The 'nth' term is a formula with 'n' in it which enables you to find any term of a sequence without having to go up from one term to the next.
'n' stands for the term number so to find the 50th term we would just substitute 50 in the formula in place of 'n'.
There are two types of sequences that you will ... | 4 | [
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0.001922607421875,
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0.0202636... | 34,887 | 34887 | |
Details
Hewlett-Packard HP-41C
Datasheet legend
Ab/c: Fractions calculation
AC: Alternating current
BaseN: Number base calculations
Card: Magnetic card storage
Cmem: Continuo... | 5 | [
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-0.0246582... | 34,888 | 34888 | |
Derivative of a Vector Proof
June 4th 2010, 07:02 PM #1
Junior Member
Joined
Apr 2010
From
Riverside, CA
Posts
58
Derivative of a Vector Proof
f(t) = real-valued function
u(t) = vector
I need help to prove the following:
d/dt [f(t)u(t)] = f'(t)u(t) + f(t)u'(t)
I know this is proba... | 4 | [
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0.0... | 34,889 | 34889 | |
Pre-test 6 help
#6. Condense the expression to the logarithmic of a single quanity. [2log 5 (x+4)+7log 5 (x+7)]-1/2log 5 x Hello Brooke: Use the properties of logs. log(a)+log(b)=log(ab)...[1] log(a)-log(b)=log(a/
b)...[2] Rewrite as: $log_{5}(x+4)^{2}+log_{5}(x+7)^{7}-log_{5}x^{\frac{1}{2}}$ Using [1] $log_{5}((x+4)^{... | 4 | [
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0.... | 34,890 | 34890 | |
Square Root
July 18th 2008, 05:45 AM #1
MHF Contributor
Joined
Jul 2008
From
NYC
Posts
1,489
Square Root
Why is the answer to a square root problem always positive and negative?
SAMPLE:
sqrt{16} = -4 and +4
Why two answers?
Because $(-4)^{2}=16$ and $4^{2}=16$
They both lead ... | 4 | [
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... | 34,891 | 34891 | |
Homework Help
Posted by Andy G on Tuesday, January 14, 2014 at 9:15pm.
ball thrown vertically upward with an initial velocity of 80 ft per second. The distance s(in ft) of the ball from the ground after t seconds is s=80t-16t^2.
a. draw the illustration.
b. for what time interval is ball more than 96 ft above ground... | 4 | [
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-0.01... | 34,892 | 34892 | |
probability distribution ...
May 25th 2007, 04:45 AM #1
Member
Joined
Jul 2006
Posts
95
probability distribution ...
Hello,
I face some problem in this question plz try to solve that.
Thanks .
Question:
Suppose is a random variable best described by a probability distribution given as:f(... | 5 | [
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estimating lattice sums of concave functions
up vote 2 down vote favorite
Suppose that $f$ is a twice-differentiable concave function from $R^2$ to $R$ that's negative outside of some bounded set (e.g. $f(x,y)=1-x^2-y^2$) and let $F=$max$(f,0)$. Let $S_n$ be the Riemann
sum for the integral of $F$ over $R^2$ obtained ... | 5 | [
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Stochastic Models to Generate Geospatial-, Temporal-, and Cross-Correlated Daily Maximum and Minimum Temperatures
Advances in Meteorology
Volume 2014 (2014), Article ID 365362, 14 pages
http://dx.doi.org/10.1155/2014/365362
Research Article
Stochastic Models to Generate Geospatial-, Temporal-, and Cross-Correlated Da... | 4 | [
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differential equations help
y''-2.5y'=9.81 I can't seem to be able to solve this. Any help would be awesome.
This is a second order equation with constant linear coefficients. We have a method to use to solve problems of these types, where we assume the solution to our equation follows some form (your book
should list... | 4 | [
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-0.0272216796875... | 34,896 | 34896 | |
Homework Help
Posted by Sophia on Sunday, January 25, 2009 at 9:40pm.
An airplane traveling 1001 m above the ocean at 125km/h is going to drop a box of supplies to shipwrecked victims below. What is the horizontal distance between the plane and the victims when the box
is dropped?
• physics - Sophia, Sunday, Januar... | 4 | [
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Cardinal numbers proof
January 22nd 2008, 09:23 AM #1
Newbie
Joined
Jan 2008
Posts
6
Cardinal numbers proof
How can I prove these lines:
Let N be a set of natural numbers and |N|=Xo.
How can i prove that
Xo + k = Xo
or
Xo * Xo = Xo
Help anyone?
i assume $k$ is a cardinal nu... | 4 | [
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Pigeonhole problem
January 15th 2013, 10:51 PM #1
Newbie
Joined
Jan 2013
From
germany
Posts
1
Pigeonhole problem
I'm struggling with this problem for a while now, and I just can't figure it out.
Prove: Let $n_1, n_2, . . . , n_t \in N^+$
. If $n_1 + n_2 + . . . + n_t-t + 1$ Objects are laid ... | 4 | [
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