content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
[SOLVED] How to differentiate this?
August 30th 2009, 08:24 AM #1
Member
Joined
May 2009
Posts
99
[SOLVED] How to differentiate this?
$\frac{1-x^2}{\sqrt{1 + 2x}}$
This is my take on the question:
$=\frac{\sqrt{1+2x}(-2x) - (1-x^2)\frac{1}{\sqrt{1 + 2x}}}{1 + 2x}$
$=\frac{(-2x)(1 + 2x) - (... | 5 | [
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-... | 25,100 | 25100 | |
Surface Area basic
1. October 10th 2010, 06:50 PM #1
2. October 10th 2010, 07:40 PM #2
Hey,
So the surface area of a cylinder is:
$SA_{cyl} = 2\pi r^2 + 2\pi rh$
Since we are taking off the top of the cylinder we can change it to:
$SA_{cyl} = \pi r^2 + 2\pi rh$
... | 4 | [
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Finding locations of absolute extrema
February 4th 2007, 12:15 PM
Mathamateur
Finding locations of absolute extrema
Trying to review for my test next week and this is an example problem that I have a feeling will be on the test yet I am somewhat lost on how to solve. Thanks in advance for the help!
Find th... | 4 | [
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-0... | 25,102 | 25102 | |
Finding an equation to a line
June 11th 2012, 06:09 PM #1
Newbie
Joined
Jun 2012
From
toronto
Posts
1
Finding an equation to a line
I have this homework question, and I don't quite understand it. Can you please help me ?1. Find an equation of a line(s) that is tangent to the curve f(x)=2cos3x and who... | 4 | [
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Calculation of the Effective Delayed Neutron Fraction by Deterministic and Monte Carlo Methods
Science and Technology of Nuclear Installations
VolumeΒ 2011Β (2011), Article IDΒ 584256, 8 pages
http://dx.doi.org/10.1155/2011/584256
Research Article
Calculation of the Effective Delayed Neutron Fraction by Deterministic... | 4 | [
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0.04541015... | 25,104 | 25104 | |
Probability question...
November 4th 2007, 08:34 PM #1
Newbie
Joined
Oct 2007
Posts
5
Probability question...
Takeisha and Antoine are part of a group of 8 women and 8 men who will participate in a chess tournament. They will be paired up randomly into teams of two. (Takeisha is a female and Antoine is a... | 4 | [
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Parametric equations of plane problem
July 15th 2007, 05:52 AM
clockingly
Parametric equations of plane problem
This problem was confusing me so any help would be appreciated!
Write both the parametric and symmetric equations of the line of intersection of the planes with the equations 2x - y + z = 5 and x ... | 5 | [
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... | 25,106 | 25106 | |
Math Help
March 13th 2010, 11:42 PM #1
Newbie
Joined
Mar 2010
Posts
10
Limits
Determine the following limits if they exists. If the limit exists, establish the convergence.
$(a) \lim _{n\rightarrow\infty} (\sqrt{(n+a)(n+b)} - n$ where $a,b$$> 0.$
$(b) \lim _{n\rightarrow\infty} (n!)^{\frac{1}{... | 5 | [
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Weighted Composition Operators on the Zygmund Space
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 462482, 18 pages
http://dx.doi.org/10.1155/2012/462482
Research Article
Weighted Composition Operators on the Zygmund Space
Department of Mathematics, Fujian Normal University, Fuzhou 350007, China
Recei... | 5 | [
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Global Behaviors of a Class of Discrete SIRS Epidemic Models with Nonlinear Incidence Rate
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 249623, 18 pages
http://dx.doi.org/10.1155/2014/249623
Research Article
Global Behaviors of a Class of Discrete SIRS Epidemic Models with Nonlinear Incidence Rate
^1... | 5 | [
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Writing a Fraction in Simplest Form
July 11th 2006, 06:44 PM
Euclid Alexandria
After a week I thought I'd give this another try. I'm using Soroban's formula to reproduce the mathematical joke,
$\frac{1\!\!\!ot{6}}{ot{6}4} = \frac{1}{4}$
While incorrectly solved, it still gives the correct answer. Any hi... | 4 | [
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Interesting Integral
• Interesting Integral
Compute
$\int_0^{\pi/2}\frac{\sin x}{9+16\sin(2x)}\,dx$
• Re: Interesting Integral
Use the substitutions...
$t= \tan \frac{x}{2}$
$dx = 2\ \frac{dt}{1+t^{2}}$
$\sin x = \frac{2 t}{1+t^{2}}$
$\cos x = \frac{1-t... | 4 | [
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0.0164794921875... | 25,111 | 25111 | |
Normal distribution Question
November 7th 2009, 09:12 AM #1
Normal distribution Question
A factory manufactures steel poles; the length of the poles are approximately normally dis-
tributed with mean 75cm with standard deviation 1cm. Find the probability that a randomly
selected pole will be between 74.5 ... | 4 | [
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Anthony and Michael sit on the six-member board of directors
Author Message
TAGS:
Anthony and Michael sit on the six-member board of directors [#permalink] 04 Nov 2009, 16:28
... | 4 | [
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tricky degree standard differential equation and calculus question! need some advice
March 12th 2012, 03:06 PM #1
Newbie
Joined
Mar 2012
From
Exeter
Posts
9
Hi,
We've been given this tricky question and I have a few ideas jotted down but when I've gone to try them they haven't been making sense a... | 4 | [
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The inverse of a function
December 30th 2009, 02:05 AM #1
The inverse of a function
Hi,
I would like some help with a problem.
Show that $F(x) = \frac{4x^3}{x^2+1}$ has an inverse and find
$f^{-1}´(2)$
How do you invert fractions like this?
//Jones
$f(x) = \frac{4x^3}{x^2+1}$ ... doma... | 5 | [
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0.... | 25,115 | 25115 | |
the encyclopedic entry of directed set
In
mathematics
, a
directed set
(or a
directed preorder
or a
filtered set
) is a nonempty
set A
together with a
reflexive
and
transitive binary relation
(i.e.,
preorder
) ≤ having the additional property that every pair of elements has an
upper bound
; more preci... | 4 | [
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-... | 25,116 | 25116 | |
about multiple angles of trigonometry
August 2nd 2008, 01:45 AM #1
Junior Member
Joined
Jun 2008
Posts
53
about multiple angles of trigonometry
my answer is different from the provided answer.
can someone please help me to check where i gone wrong??
the question is:
given that sin X= - 5/13... | 4 | [
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rectangular coordinate system
I don't understand this problem but i am still working on it....
Hi Veronica! It seems to me that the right answer is missing... But to find out, suppose the line is of the form $\mathbf{a} + \lambda \mathbf{b}$ with $\lambda > 0$. What are the options for $a_x$?
And what are the correspo... | 4 | [
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Global Stability of a Stage-Structured Predator-Prey Model with Stochastic Perturbation
Discrete Dynamics in Nature and Society
Volume 2014 (2014), Article ID 512817, 8 pages
http://dx.doi.org/10.1155/2014/512817
Research Article
Global Stability of a Stage-Structured Predator-Prey Model with Stochastic Perturbation
... | 5 | [
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0.03857421875,
-0.0... | 25,119 | 25119 | |
How to calculate grades?
November 7th 2007, 08:07 AM #1
Newbie
Joined
Nov 2007
Posts
2
How to calculate grades?
Lets say you got 46 out 55 on test which equals 83.64%
This test is worth 20% of your total mark(100), how do you find out the % you got from 20%?
Okay, you got 83.64% of 20%, so just... | 4 | [
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0.064... | 25,120 | 25120 | |
Prove this limit
September 15th 2008, 01:45 PM #1
Member
Joined
May 2008
Posts
138
Prove this limit
We just learned this (well, a much more basic version) today in calculus, and I have no idea where to start on this problem.
$<br /> \lim_{x \to 0^{+}}$ $\sqrt{x}*e^{\sin(\pi/x)} = 0<br /> <br />$
... | 5 | [
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Chaos in a Magnetic Pendulum Subjected to Tilted Excitation and Parametric Damping
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 546364, 18 pages
http://dx.doi.org/10.1155/2012/546364
Research Article
Chaos in a Magnetic Pendulum Subjected to Tilted Excitation and Parametric Damping
^1Center fo... | 4 | [
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0.05297851... | 25,122 | 25122 | |
Did I derive this right?
Quote:
Ok here goes... let $u = x^{2}$ and $v = 4\pi$ differentiating u w.r.t x we get $\frac{du}{dx} = 2x$ and differentiating v w.r.t x we get $\frac{dv}{dx} = 0$ This is always the case when
differentiating constants. Applying the quotient rule we get;$\frac{dy}{dx} = \frac{4\pi... | 5 | [
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0.02... | 25,123 | 25123 | |
Math Help
May 22nd 2010, 10:43 PM #1
Summation
Show that $\sum (-1)^{r+1} r^2$ = -n(2n+1)
summation is from r=1 to 2n . sry i dont know how to type
Thx
hi
\sum^{2n}_{r=1}(-1)^{r+1} r^2 will generate
$\sum^{2n}_{r=1}(-1)^{r+1} r^2$
$=1-4+9-16+25-36+...$
$=1^2-2^2+3^2-4^2+...+(2... | 4 | [
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Noise Radar Technology as an Interference Prevention Method
Journal of Electrical and Computer Engineering
Volume 2013 (2013), Article ID 146986, 6 pages
http://dx.doi.org/10.1155/2013/146986
Research Article
Noise Radar Technology as an Interference Prevention Method
Department of Electronic Engineering, Tor Vergat... | 4 | [
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mapping homomorphism and subgroup
January 27th 2009, 07:55 AM #1
Member
Joined
Oct 2008
Posts
83
mapping homomorphism and subgroup
1) Describe explicitly all homomorphisms h: C_6 maps to Aut(C_12)
Firstly, I have to find what group Aut(C_12) is isomorphic to, and then find the order of that group. I... | 4 | [
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Boundedness of Solutions to Differential Equations of Fourth Order with Oscillatory Restoring and Forcing Terms
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 758796, 5 pages
http://dx.doi.org/10.1155/2013/758796
Research Article
Boundedness of Solutions to Differential Equations of Fourth Ord... | 5 | [
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Definite Intergral
December 8th 2009, 11:53 AM #1
Member
Joined
Nov 2008
From
Ontario
Posts
80
Definite Intergral
Hi, could someone tell me if this is the correct answer?
$<br /> <br /> \int_0^2 {3x^5e^{x^3}dx}<br />$
I got:
$<br /> 7e^8 +1$
Thanks, what about this one? It's rathe... | 5 | [
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Approximate Solution of LR Fuzzy Sylvester Matrix Equations
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 752760, 10 pages
http://dx.doi.org/10.1155/2013/752760
Research Article
Approximate Solution of LR Fuzzy Sylvester Matrix Equations
^1College of Mathematics and Statistics, Northwest Normal Unive... | 5 | [
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Dual Approximate Solutions of the Unsteady Viscous Flow over a Shrinking Cylinder with Optimal Homotopy Asymptotic Method
Advances in Mathematical Physics
Volume 2014 (2014), Article ID 417643, 11 pages
http://dx.doi.org/10.1155/2014/417643
Research Article
Dual Approximate Solutions of the Unsteady Viscous Flow over... | 5 | [
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Vector Proof
August 30th 2012, 10:48 PM
TaTzRE66
Vector Proof
Hi all.
I am stuck at this vector proof question and need help.
Suppose vectors a,b,c satisfy ||a|| > (1/2) + sqrt((1/4)+||c||)
and ||b|| = (||a||)^2
Prove that ||b-c|| > ||a||
Someone please help, thank you.(Worried)(Worried)... | 5 | [
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Minkovski's Inequality
June 6th 2006, 01:54 PM #1
Junior Member
Joined
Jun 2006
Posts
59
Minkovski's Inequality
We were given this inequality to prove:
sqrt(summation of (ak + bk)^2 from K=1 to n) <=
sqrt(summation of (ak)^2 from K=1 to n) + sqrt(summation of (bk)^2 from K=1 to n)
We were ... | 5 | [
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generating functions again! :(
November 13th 2009, 12:34 PM #1
Junior Member
Joined
Nov 2009
Posts
37
Heather just had new neighbours move in next door and would like to make a fruit basket for
them. When her husband returned from the grocery store he had a bag containing apples,
bananas, and oran... | 5 | [
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Radiation and Mass Transfer Effects on MHD Free Convection Flow of a Micropolar Fluid past a Stretching Surface Embedded in a Non-Darcian Porous Medium with Heat Generation
ISRN Thermodynamics
Volume 2013 (2013), Article ID 534750, 15 pages
http://dx.doi.org/10.1155/2013/534750
Research Article
Radiation and Mass Tra... | 4 | [
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-Sequence Spaces Defined by Ideal Convergence and the Musielak-Orlicz Function
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 123798, 13 pages
http://dx.doi.org/10.1155/2013/123798
Research Article
Generalized Difference λ-Sequence Spaces Defined by Ideal Convergence and the Musielak-Orlicz Function
^1... | 5 | [
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Course Content and Outcome
Course Content and Outcome Guide for MTH 252
Course Number:
MTH 252
Course Title:
Calculus II
Credit Hours:
5
Lecture Hours:
50
Lecture/Lab Hours:
0
Lab Hours:
0
Special Fee:
Course Description
Includes antiderivatives, the definite integral, topics of integration, ... | 4 | [
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Measure zero and differentiability
1. The problem statement, all variables and given/known data
I proved in the preceding exercise the following characterization of measure zero:
"A subset E of R is of measure zero if and only if it has the following property:
(***) There exists a sequence [tex]J_k=]a_k,b_k[[/tex] su... | 4 | [
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0.0167236328125... | 25,137 | 25137 | |
Isomorphism Question
November 8th 2009, 10:01 PM #1
Banned
Joined
Oct 2009
Posts
24
Isomorphism Question
G has 16 elements and H has 4 elements....so G/H = 4?
Now I have what seems like a corollary in my book, but not stated as...it says "a group of order 4 is isomorphic to Z4 or Z2+Z2 (direct... | 5 | [
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A Note on the Adversary Degree Associated Reconstruction Number of Graphs
Journal of Discrete Mathematics
Volume 2013 (2013), Article ID 808105, 5 pages
http://dx.doi.org/10.1155/2013/808105
Research Article
A Note on the Adversary Degree Associated Reconstruction Number of Graphs
^1Department of Mathematics, Manonm... | 5 | [
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prove that |HK| = |H||K| / |H ∩ K|
October 16th 2011, 12:58 AM #1
Member
Joined
Aug 2008
Posts
249
prove that |HK| = |H||K| / |H ∩ K|
Given that H and K are subgroups of G, prove that |HK| = |H||K| / |H ∩ K|. i have that if H and K share elements then there is some h1k1 = h2k2 in HK. but since H and K ar... | 5 | [
0.018310546875,
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An Analysis of the Flow of a Newtonian Fluid between Two Moving Parallel Plates
ISRN Mathematical Analysis
Volume 2013 (2013), Article ID 535061, 6 pages
http://dx.doi.org/10.1155/2013/535061
Research Article
An Analysis of the Flow of a Newtonian Fluid between Two Moving Parallel Plates
^1Department of Mathematics... | 5 | [
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Straight Line Geometry Q
November 28th 2005, 04:30 AM #1
Junior Member
Joined
Oct 2005
Posts
29
Straight Line Geometry Q
The straight line L passes through the points A(6,4) and B(2,10)
1) Find an equation of L expressing your answer in the form ax+by+c=0
The point (-2,k) lies on the line L
... | 4 | [
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Visualizing systems of linear equations and linear transformations
December 2, 2013
By Brian Lee Yung Rowe
This is a lecture post for my students in the CUNY MS Data Analytics program. In this series of lectures I discuss mathematical concepts from different perspectives. The goal is to ask questions and
challenge s... | 5 | [
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Quick Binomial Expansion question
What is the coefficient of x3 in this expansion.... (1-x2)2(1+x)8 Thanks!
Before we had that, we had to use this: Binomial theorem - Wikipedia, the free encyclopedia So $(1-x^2)^2 = 1-2x^2+x^4$, and $(1+x)^8=1+8x+28x^2+56x^3+70x^4+56x^5+28x^6+8x^7+x^ 8$ Picking out the $x^
3$ terms gi... | 4 | [
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solving and equation
March 5th 2011, 04:30 AM
tmn50
solving and equation
Hello hope you're having a good day
I need help in solving these problems
Find a set of real numbers (R) such as
sqrt(ab)+sqrt(cd) >= sqrt(a+b) + sqrt (c+d)
the Second is solving this
(a^3+b)(a+b^3)= (a+b)^4
a and... | 5 | [
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0.042724609375,
-0.064... | 25,145 | 25145 | |
Bayesian Analysis: A Conjugate Prior and Markov Chain Monte Carlo
Introduction
This is meant to be shorter blog post than normal with the expectation that the material will be developed further in future blog posts.
A Bayesian will have a prior view of the distribution of some data and then based on data, update tha... | 5 | [
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0.103515625,
-0.0038757324218... | 25,146 | 25146 | |
Adding and Subtracting Rational Expressions
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
┃ Adding and Subtracting Rational (Fractional) Expressions ┃
┃ Topic Index | Algebra2/Trig Index | Regents Exam Prep Center┃
┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
... | 4 | [
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0.09326171875,
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0.033203125,
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0.1220703125,
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Scattered Radiation Emission Imaging:
International Journal of Biomedical Imaging
Volume 2011 (2011), Article ID 913893, 15 pages
http://dx.doi.org/10.1155/2011/913893
Review Article
Scattered Radiation Emission Imaging: Principles and Applications
^1Laboratoire Equipes Traitement de l'Information et Systèmes, CNRS... | 4 | [
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... | 25,148 | 25148 | |
the encyclopedic entry of Neutral particle oscillations
In
particle physics
,
neutral particle oscillation
is the transmutation of a neutral particle with nonzero internal
quantum numbers
into its
antiparticle
. These oscillations and the associated
mixing of particles
gives insight into the realization of di... | 4 | [
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Remarks on Some Recent Coupled Coincidence Point Results in Symmetric
Journal of Operators
Volume 2013 (2013), Article ID 290525, 8 pages
http://dx.doi.org/10.1155/2013/290525
Research Article
Remarks on Some Recent Coupled Coincidence Point Results in Symmetric -Metric Spaces
Faculty of Mechanical Engineering, Uni... | 5 | [
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3 math problems.
October 15th 2010, 12:01 PM #6
Newbie
October 15th 2010, 10:27 AM #5
October 15th 2010, 09:24 AM #4
Super Member
October 15th 2010, 07:52 AM #3
October 15th 2010, 07:49 AM #2
October 15th 2010, 07:37 AM #1
Newbie
Thank you. It did help me a lot!
To #1:
1. Probably you have noticed ... | 4 | [
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-0.00... | 25,151 | 25151 | |
magic matrix
February 26th 2009, 05:07 AM #1
Member
Joined
Dec 2008
Posts
86
magic matrix
Hello
I would like to have help solving the problem:
I have to invent a marix 3*3 with entries from 1 to 8 such that all rows and all columns and al diagonals add to 12
the first row must be 7,2,3
... | 4 | [
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-0... | 25,152 | 25152 | |
L Networks for Reactive Loads
[Table of Contents]
These articles are scanned and OCRed from old editions of the ARRL's QST magazine. Here is a list of the QST articles I have already posted. All copyrights (if any) are hereby acknowledged.
L networks are probably the most common types of impedance matching networks n... | 5 | [
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0.0673828125,
-0.01806640625,
-... | 25,153 | 25153 | |
integration Q
March 8th 2008, 06:24 AM #1
Newbie
Joined
Mar 2008
Posts
3
integration Q
ind the area under the curve Y = 1 / 1 + (X)^0.5 between x = 0 and x = 1 using the substitution u = 1 + (x)^0.5
$\int_0^1 {\frac{1}<br /> {{1 + \sqrt x }}\,dx} .$
By setting $u = 1 + \sqrt x \implies du = \fr... | 4 | [
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conformal mapping (help needed)
August 9th 2009, 02:53 AM #1
Newbie
Joined
Aug 2009
Posts
1
conformal mapping (help needed)
Im mechanics engineering student and Im working on torsion problem of elasticity. I would be thankful if someone teaches me how to map a non-circular closed curve with components of... | 4 | [
-0.02197265625,
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A Chaos-Based Secure Direct-Sequence/Spread-Spectrum Communication System
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 764341, 11 pages
http://dx.doi.org/10.1155/2013/764341
Research Article
A Chaos-Based Secure Direct-Sequence/Spread-Spectrum Communication System
School of Electronics and Telecommun... | 4 | [
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Permutations
November 17th 2009, 05:22 PM #1
Member
Joined
Sep 2009
Posts
78
Permutations
How many four-digit numbers can you form with the digits 1, 2, 3, 4, 5, 6, and 7 if no digit is repeated?
How many of these four-digit numbers are odd numbers?
How many of them are even numbers?
I nee... | 4 | [
-0.000797271728515625,
0.01104736328125,
0.0576171875,
-0.039306640625,
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0.123046875,
0.031005859375,
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0.0615234375,
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0.01904296875,
0.0137939453125,
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0.06884765625,
-0.0556640625,
-0.00860... | 25,157 | 25157 | |
square numbers
October 14th 2008, 07:45 PM
fecoupefe
square numbers
When a natural number is multiplied by itself,the result is a square number. Some examples of square numbers are 1,4,9,16 and 25.
How many square numbers are there between 1,000 and 2000?
October 14th 2008, 08:03 PM
vincisonfire
Reply
... | 4 | [
0.0654296875,
-0.00592041015625,
-0.01483154296875,
0.04150390625,
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0.051513671875,
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0.047607421875,
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-0.007232666015625,
0.00439453125,
-0.03564453125... | 25,158 | 25158 | |
Finite-Time Chaos Control of a Complex Permanent Magnet Synchronous Motor System
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 976042, 7 pages
http://dx.doi.org/10.1155/2014/976042
Research Article
Finite-Time Chaos Control of a Complex Permanent Magnet Synchronous Motor System
^1School of Information... | 5 | [
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0.0673828125,
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-0.0454101562... | 25,159 | 25159 | |
Lévy-Flight Krill Herd Algorithm
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 682073, 14 pages
http://dx.doi.org/10.1155/2013/682073
Research Article
Lévy-Flight Krill Herd Algorithm
^1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 1300... | 4 | [
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0.07861328125,
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-0.03686523437... | 25,160 | 25160 | |
Analysis of Plasmonic Waveguides and Gratings Using Implicit Finite-Difference Methods
Advances in OptoElectronics
Volume 2011 (2011), Article ID 287284, 6 pages
http://dx.doi.org/10.1155/2011/287284
Research Article
Analysis of Plasmonic Waveguides and Gratings Using Implicit Finite-Difference Methods
Faculty of En... | 4 | [
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How do I determine which space these vectors span?
October 4th 2010, 12:30 PM
jayshizwiz
How do I determine which space these vectors span?
Hi guys. I'm gonna right down two different problems. The first one I understand but not the second. Find the space the vectors span.
1. a=(3,5,0) b=(1,2,0) sp(a,b)= $(... | 4 | [
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Measuring the speed of a projectile - Arduino Forum
Quote
It is a 2 meters long vacuum cannon.
P = Atmospherics pressure = 101325 Pascal
r = 0.02 meters
A = (pi)(r)^2
F = PA
F = (101325)(3.14 X 0.04) = 12732.8750
W = Fd = (12732.8750)(2) = 25465.75
W = (1/2)(m)(V)^2
V = square root((2 X 25465.75)/0.04) = 1128
V = 11... | 4 | [
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Mathematical Fundamentals of Modern Linear Optics
International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 273107, 15 pages
http://dx.doi.org/10.1155/2012/273107
Review Article
Mathematical Fundamentals of Modern Linear Optics
Department B3: High Power Lasers, Max-Born-Institute for Nonlinear... | 4 | [
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... | 25,164 | 25164 | |
Math Help
December 7th 2006, 06:35 PM #1
Member
Joined
Nov 2006
From
chicago
Posts
156
Let y = loga(10) + loga(12) - loga(6)
Find a if y=1
Find a if y=-1
Find a if y=2
If you can show me any of the obove please let me know.
THANKS
log(10)/log(a) + log(12)/log(a) - log(6... | 4 | [
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... | 25,165 | 25165 | |
int
Read MasteringPhysics: Assignment Print View text version
MasteringPhysics: Assignment Print View
Introduction to Potential Energy
Learning Goal: Understand that conservative forces can be removed from the work integral by incorporating them into a new form of energy called potential energy that must be added ... | 5 | [
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the encyclopedic entry of ascending-node
The
longitude of the ascending node
(☊ or Ω) is one of the
orbital elements
used to specify the
orbit
of an object in space. It is the angle from a reference direction, called the
origin of longitude
, to the direction of the
ascending node
, measured in a
reference p... | 4 | [
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Existence of Multiple Nontrivial Solutions for a Strongly Indefinite Schrödinger-Poisson System
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 240208, 8 pages
http://dx.doi.org/10.1155/2014/240208
Research Article
Existence of Multiple Nontrivial Solutions for a Strongly Indefinite Schrödinger-Poisson S... | 5 | [
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Near-Zero-Refractive-Index Structure at Optical Frequencies
Advances in Condensed Matter Physics
Volume 2013 (2013), Article ID 328402, 8 pages
http://dx.doi.org/10.1155/2013/328402
Research Article
Near-Zero-Refractive-Index Structure at Optical Frequencies
^1Department of Physics, Al-Azhar University, Gaza, Palest... | 4 | [
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Please, never use my codes without checking twice (at least)!
October 9, 2013
By arthur charpentier
I wanted to get back on some interesting experience, following a discussion I had with Carlos after my class, this morning. Let me simplify the problem, and change also the dataset. Consider the
following dataset
> d... | 5 | [
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Hermitian matrix proof
April 21st 2013, 01:45 PM
jpquinn91
Hermitian matrix proof
If A is a Hermitian matrix, and B is a complex matrix of same order as A, then $BAB^*$ is also a Hermitian matrix.
Anyone know how to prove this other than just writing it all out by hand?
April 21st 2013, 06:34 PM
mathguy25... | 4 | [
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... | 25,171 | 25171 | |
vector questions
find the co-ordinates of the point of intersection of the lines whose equations are, $\frac{x}{1}= \frac{y}{3}=\frac{z}{2}\ and \ \frac{x-2}{1}=\frac{y-3}{4}=\frac{z-4}{2}$
Re-write the equations: $\left|\begin{array}{l}x = t\\y=3t\\z=2t\end{array}\right.$..... and ..... $\left|\begin{array}{l}x=s+2\\... | 4 | [
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Probability Proof
January 30th 2011, 12:15 PM
divinelogos
Probability Proof
Problem:
Let A and B be two events, show that:
P(A) + P(B) -1 $\leq$ P(A U B) $\leq$ P(A)+P(B)
Questions/Attempts:
Am I supposed to assume that A and B are the only events in the sample space, and that therefore P(A)+... | 4 | [
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Math Help
1. January 13th 2011, 03:30 PM #1
2. January 13th 2011, 05:02 PM #2
When you have a DE in the form, $y'+p(x)y=f(x)$, the integrating factor is $\displaystyle\exp{\left(\int p(x)dx\right)}$
$\displaystyle\int\frac{d}{dx}\left[\exp{\left(\int p(x)dx\right)}y\right]dx=\int\left[\exp{\left... | 4 | [
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... | 25,174 | 25174 | |
Applications of Liouville's theorem
up vote 6 down vote favorite
3
I'm looking for "nice" applications of Liouville's theorem (every bounded entire map is constant) outside the area of complex analysis.
An example of what I'm not looking for : a non-constant entire function has dense image (this is essentially a coro... | 4 | [
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and its computation
The constant e and its computation
e = 2.71828182845904523536028747135266249775724709369995...
(Click here for a Postscript version of this page.)
e^ip+1=0 , all analysis lies here
- Felix Klein (1849-1925... | 4 | [
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lesson plan when
You are here: Home → Articles → Understanding Sine
Understanding Sine
A teaching guideline/lesson plan when first teaching sine (grades 7-9)
The sine is simply a RATIO of certain sides of a right triangle. Look at the triangles below. They all have the same shape. That means they have the SAME ANGLE... | 4 | [
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0.0... | 25,177 | 25177 | |
limits plz help
November 7th 2006, 05:04 AM #1
Member
Joined
Sep 2005
Posts
136
limits plz help
1.Find the value of Lim x->0+ (cos x-1)/x^2
(a)1/4 (b)-2 (c) infinity (d) -1/2 (e) none
2.find the value of limit lim x->inf x sin(1/x)
(a)0 (b)1 (c)2 (d)4 (e)none
3.find the value of limit l... | 5 | [
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A Number Theory short (?) story: Christian Aebi's "13" problem
In August 2002, Christian Aebi posted the following question on the sci.math newsgroup:
"Trying to solve the problem: if n > 9 then n*(n+1)*(n+2)*(n+3) is divisible by a prime > or = ... | 4 | [
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Jensen's Inequality for Generalized Peng's
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 683047, 8 pages
http://dx.doi.org/10.1155/2013/683047
Research Article
Jensen's Inequality for Generalized Peng's -Expectations and Its Applications
School of Mathematical Sciences, Qufu Normal University, Qufu, ... | 5 | [
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Periods of the Bulbs
Rotation Numbers and Internal angles of
the Mandelbrot bulbs
... | 4 | [
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-0.12109375,
-0.0825195... | 25,181 | 25181 | |
Find Dimensions of a Log
February 5th 2013, 11:40 PM
BobBali
Find Dimensions of a Log
Good day to All,
The question asked what are the dimensions of a square that can be cut from a cross-section of a tree log. The diameter of the log is given as 40cm. In my pic below it may not look like a square,
but i... | 5 | [
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0.03466796875,
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0.00665283203125,
0.060791015625,
0.095703125,
-0.009033203125,
0.046875,
-0.042236328125,
0.02099609375... | 25,182 | 25182 | |
Unfair dice
April 29th 2010, 06:02 AM #1
Newbie
Joined
Apr 2010
Posts
12
Unfair dice
Let S1 and S2 be the results from throwing two dice. Let X = S1 + S2. Now suppose that the dice are unfair, and that they give the values 1,...,6 with probabilities p1, . . . , p6 and q1, . . . ,
q6, respectively. Wr... | 4 | [
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0.00946044921875,
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0.0... | 25,183 | 25183 | |
Finding the real parts of this equation
November 6th 2012, 04:18 AM
Matt1993
Finding the real parts of this equation
Finding the real parts to both sides of this equation
I am really stuck trying to find the real parts to both sides of this equation.
1 + exp(theta(i)) + exp(2theta(i)) + .... + exp((n-1)t... | 5 | [
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0.06982421875,
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0.06982421875,
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0.00927734375,
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0.0478515625,
-0.04248046875,
-0.0306396484375,
... | 25,184 | 25184 | |
Quadrilateral with area and 2 sides only
February 5th 2011, 10:38 AM #1
Member
Joined
Mar 2010
Posts
82
Quadrilateral with area and 2 sides only
Hi
I have 2 triangles when joined by a common side form a quadrilateral:
1. right angled triangle with the opposite side about 17 metres
2. non-ri... | 4 | [
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-0.02... | 25,185 | 25185 | |
Simple vector/linear algebra question
May 31st 2013, 05:39 AM
sobering
Simple vector/linear algebra question
Hi guys,
I'm currently enrolled in a course in university called Vector Geometry and Linear Algebra. I've never been too strong at math but with some dedication I've always been able to push through.... | 4 | [
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P-adic Woes
December 28th 2005, 06:33 PM #1
diffyq
Guest
P-adic Woes
I've been working on this problem for my analysis class for a while now, and I don't have any idea where to go. Any help at all would be greatly appreciated. Thanks!
Suppose p is an odd prime. Define the set P = {x in Q_p: |x|_p < 1}, that ... | 4 | [
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-0.108... | 25,187 | 25187 | |
A Dynamic Intelligent Decision Approach to Dependency Modeling of Project Tasks in Complex Engineering System Optimization
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 398123, 12 pages
http://dx.doi.org/10.1155/2013/398123
Research Article
A Dynamic Intelligent Decision Approach to Dependency M... | 4 | [
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0.083984375,
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0.06884765625,
-0.13085937... | 25,188 | 25188 | |
Estimation of Stochastic Frontier Models with Fixed Effects through Monte Carlo Maximum Likelihood
Journal of Probability and Statistics
Volume 2011 (2011), Article ID 568457, 13 pages
http://dx.doi.org/10.1155/2011/568457
Research Article
Estimation of Stochastic Frontier Models with Fixed Effects through Monte Carl... | 4 | [
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Existence Results for Solutions of Nonlinear Fractional Differential Equations
Abstract and Applied Analysis
Volume 2012 (2012), Article ID 267108, 12 pages
http://dx.doi.org/10.1155/2012/267108
Research Article
Existence Results for Solutions of Nonlinear Fractional Differential Equations
^1Department of Statistics... | 5 | [
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-0.... | 25,190 | 25190 | |
Series convergence/divergence question
May 4th 2010, 08:37 PM #1
Junior Member
Joined
Dec 2008
Posts
28
Series convergence/divergence question
Hello, I'm having a bit of trouble with with testing if this series converges or diverges.
$\sum_1^\infty\frac{sin(\frac{1}{n})}{\sqrt{n}}$
I've tried m... | 5 | [
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-0.04... | 25,191 | 25191 | |
bijection of e^x * ln x
January 20th 2010, 11:50 AM
Gok2
bijection of e^x * ln x
Hey people.
I need to prove that f(x)=e^x * ln x gets every value in R exactly once. I managed to prove that f(x) gets every value in R , i.e. , for each y in R there is x in (0,inf) such as f(x)=y . But
when I tried to show... | 4 | [
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A Continuous Model for the Dynamical Analysis of Mistuned Bladed Rotors
International Journal of Rotating Machinery
Volume 2012 (2012), Article ID 378565, 10 pages
http://dx.doi.org/10.1155/2012/378565
Research Article
A Continuous Model for the Dynamical Analysis of Mistuned Bladed Rotors
^1Department of Civil Engi... | 4 | [
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0.0380859375,
... | 25,193 | 25193 | |
Observability of Nonlinear Fractional Dynamical Systems
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 346041, 7 pages
http://dx.doi.org/10.1155/2013/346041
Review Article
Observability of Nonlinear Fractional Dynamical Systems
^1Department of Mathematics, Bharathiar University, Coimbatore 641 046, Ind... | 5 | [
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0.02197265625,
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The value of cube root of (-89) is:
Author Message
TAGS:
The value of cube root of (-89) is: [#permalink] 03 Nov 2009, 17:23
1
... | 4 | [
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-0.04... | 25,195 | 25195 | |
finding areas with e
February 9th 2010, 11:00 AM
mthomas1
finding areas with e
I know how to do area problems but not with e, so i would appreciate the help.
Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region.
y = e^(5 x)... | 5 | [
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0.052734375,
-0.051513671875,
-0.0595703125,
0.008056640... | 25,196 | 25196 | |
binomial probability
February 25th 2007, 02:37 PM #1
Member
Joined
Nov 2005
Posts
111
binomial probability
HI ,
I would like to have some help with this problems:
A problem in a metal casting process of a part, called severe flashing results in scrapping the part that is being cast. A particular... | 4 | [
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0.0201416015625,
0.0390625,... | 25,197 | 25197 | |
Graph of trig function
Graph y = -tan(π/2). What are its vertical asymptotes? How would I graph the function? Thanks!
$y=-\tan\left(\frac{n}{2}\right)=\ -\frac{\sin\left(\frac{n}{2}\right)}{\cos\left(\fra c{n}{2}\right)}$ and if you know the half angle formulas, which state $\sin\left(\frac{n}{2}\right)=\pm\sqrt{\
fra... | 4 | [
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... | 25,198 | 25198 | |
probability generating functions- please help
May 11th 2009, 11:25 AM #1
Junior Member
Joined
Mar 2009
Posts
34
probability generating functions- please help
A random variable Y is called gamma( $\theta$, n) for $\theta$>0 and natural n if it takes positive values and takes the following PDF:
f(y)= ... | 5 | [
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