content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
diff eqn with cos and i?
March 11th 2009, 11:02 AM #1
Junior Member
Joined
Feb 2009
Posts
34
diff eqn with cos and i?
Here it is...
d2y/dx2 + 4y=cos(x) , y(0)=1, dy/dx(0)=1. If I am correct, lambda is for this one 2i and -2i. I'm not sure if i'm doing this right... in any case, what do with this cos(... | 5 | [
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-0.039306640625,... | 27,600 | 27600 | |
Vector and parametric equations of a plane
May 24th 2010, 04:51 PM #1
Member
Joined
Sep 2009
Posts
83
Hey!
I am having trouble with a question. I have NO IDEA how to go about finding the solution, so any help is greatly appreciated!
Question
Find a vector equation and parametric equations of ... | 4 | [
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0.04638671875,
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-0.052... | 27,601 | 27601 | |
The arithmetic and geometric multiplicity of an eigenvector
April 28th 2009, 09:44 AM #1
Member
Joined
Mar 2009
Posts
77
The arithmetic and geometric multiplicity of an eigenvector
I have a matrix and I am supposed to calculate the eigenvalue, eigenvector and then give arithmetic and algebraic multiplici... | 5 | [
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... | 27,602 | 27602 | |
problem involving differencial equation
April 17th 2007, 06:09 PM #1
Member
Joined
Oct 2006
Posts
84
problem involving differencial equation
I found this calc problem in a chapter on improper integration, and it is confusing me so any help would be appreciated!
A car is travelling at 55 mph. The dri... | 5 | [
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Math Help
February 25th 2009, 02:17 PM #1
Newbie
Joined
Feb 2009
Posts
2
help...
ok so i got this problem and i did a bunch of things to try and solve it and i just cant seem to get it....
Cos(X)*Cos(2x)=1
your help would be appreciated. thanks.
well, it's not very easy to be done by hand... | 4 | [
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Analysis of a Dengue Disease Model with Nonlinear Incidence
Discrete Dynamics in Nature and Society
Volume 2013 (2013), Article ID 320581, 10 pages
http://dx.doi.org/10.1155/2013/320581
Research Article
Analysis of a Dengue Disease Model with Nonlinear Incidence
^1Department of Mathematics and Information Science, S... | 5 | [
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Standard deviation
September 29th 2009, 08:21 PM
nyasha
Standard deviation
The GPA for a class of ten females and seven males are recorded. The mean GPA of females is 3.07 and the standard deviation is 0.53. The mean GPA for males is also 3.07 and the standard deviation
is 0.68. What is standard the deviatio... | 4 | [
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0... | 27,606 | 27606 | |
Completely stumped on this problem!
October 13th 2009, 04:27 PM #1
Newbie
Joined
Oct 2009
Posts
2
Completely stumped on this problem!
If x squared = 25, y squared = 16, and z squared = 9 what is the greatest possible value of (x + y - z)squared?
My book says the answer is 144. Can someone please tel... | 4 | [
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congruence question
May 7th 2011, 05:53 PM #1
Newbie
Joined
Jan 2011
Posts
12
congruence question
Let m, n, r, e be pos. integers. I am trying to show that given m = n (mod e*r) that m^e=n^e (mod r*e^2). I have tried using the binomial theorem but keep running into problems.
Could someone help pleas... | 4 | [
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Controllability of Continuous Bimodal Linear Systems
Mathematical Problems in Engineering
Volume 2013 (2013), Article ID 342548, 14 pages
http://dx.doi.org/10.1155/2013/342548
Research Article
Controllability of Continuous Bimodal Linear Systems
Deptartament de Matemática Aplicada I, Universitat Politècnica de Catal... | 4 | [
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0.021240234375... | 27,609 | 27609 | |
Relativistic Milne-Eddington Type Solutions with a Variable Eddington Factor for Relativistic Spherical Winds
Advances in Astronomy
Volume 2011 (2011), Article ID 412620, 10 pages
http://dx.doi.org/10.1155/2011/412620
Research Article
Relativistic Milne-Eddington Type Solutions with a Variable Eddington Factor for Re... | 4 | [
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-0... | 27,610 | 27610 | |
Galois group of a polynomial
January 3rd 2010, 02:59 AM #1
Newbie
Joined
Jan 2010
Posts
23
Galois group of a polynomial
Hello.
I have to find a splitting field $L$ of the polynomial $f=x^4-4x^2+9 \in \mathbb Q[x]$ over $\mathbb Q$ and the galois group and all intermediate fields of the algebraic ext... | 5 | [
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Two variables need to equal a product
March 9th 2008, 05:09 AM #1
Junior Member
Joined
Mar 2008
Posts
58
Two variables need to equal a product
I need to construct a train cart.
The train must have a volume of $1.25 m^3$
As a train cart is on tracks, the width is set to 0.8 meters and cannot cha... | 5 | [
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Exploring Repayment Loans
Exploring Repayment Loans Follow
... | 5 | [
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Many-to-Many Multicast Routing Schemes under a Fixed Topology
The Scientific World Journal
Volume 2013 (2013), Article ID 718152, 11 pages
http://dx.doi.org/10.1155/2013/718152
Research Article
Many-to-Many Multicast Routing Schemes under a Fixed Topology
^1Zhejiang Water Conservancy and Hydropower College, Hangzho... | 4 | [
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-0.... | 27,614 | 27614 | |
Energies, Fine Structures, and Hyperfine Structures of the
Journal of Atomic, Molecular, and Optical Physics
Volume 2012 (2012), Article ID 569876, 6 pages
http://dx.doi.org/10.1155/2012/569876
Research Article
Energies, Fine Structures, and Hyperfine Structures of the States for the Beryllium Atom
School of Physics... | 4 | [
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Remark on Existence and Uniqueness of Solutions for a Coupled System of Multiterm Nonlinear Fractional Differential Equations
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 124954, 7 pages
http://dx.doi.org/10.1155/2013/124954
Research Article
Remark on Existence and Uniqueness of Solutions for a Couple... | 5 | [
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Limit Question
Last edited by CaptainBlack; October 26th 2008 at 12:25 AM.
Hello, treetheta! Edit: Made a blunder . . . will correct it now. We use: . $(a - b)(a^2+ab+b^2) \:=\:a^3-b^3$ $\lim_{x \to 0} \frac{(2x+1)^{\frac{1}{3}}-1}{x}$ Multiply top and bottom by: $(2x+1)^{\
frac{2}{3}} + (2x+1)^{\frac{1}{3}} + 1$ . . ... | 5 | [
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Evaluation of Algebraic Iterative Image Reconstruction Methods for Tetrahedron Beam Computed Tomography Systems
International Journal of Biomedical Imaging
Volume 2013 (2013), Article ID 609704, 14 pages
http://dx.doi.org/10.1155/2013/609704
Research Article
Evaluation of Algebraic Iterative Image Reconstruction Meth... | 4 | [
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Very hard age problem...
October 1st 2006, 05:07 AM #1
Senior Member
Joined
Jul 2006
From
Shabu City
Posts
381
Very hard age problem...
Eunice is three years older than steve. When they got married 40 years ago, the difference of twice Eunice age from thrice Steve's age was 16. how old will each of t... | 4 | [
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the encyclopedic entry of curvature hyperopia
In
mathematics
,
curvature
refers to any of a number of loosely related concepts in different areas of geometry. Intuitively, curvature is the amount by which a geometric object deviates from being
flat,
but this is defined in different ways depending on the context. ... | 4 | [
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... | 27,620 | 27620 | |
How to solve "397^611 mod 1763" without calculator?
February 21st 2010, 12:53 AM #1
Newbie
Joined
Sep 2009
Posts
13
How to solve "397^611 mod 1763" without calculator?
hi,
I've been trying to figure this one, trough Eulers theorem, but without
success. I do know the answer, with the calculator, ... | 5 | [
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Prove n^2<= ......
Hi, Much appreciate if anyone could help with this... Prove n^2 <= (a1+...+an).(1/a1+...+1/an)
It must be $a_i>0\,\,\,\forall\,\,i$, otherwise $2^2leq (1+(-1))\left(\frac{1}{1}+\frac{-1}{1}\right)=0$ Now, do you know the Means Inequalities?: $\frac{a_1+...+a_n}{n}\,\,\geq \,\,\sqrt[n]{a_1\cdot
...\c... | 5 | [
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Fixed Point Theorems of Quasicontractions on Cone Metric Spaces with Banach Algebras
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 187348, 5 pages
http://dx.doi.org/10.1155/2013/187348
Research Article
Fixed Point Theorems of Quasicontractions on Cone Metric Spaces with Banach Algebras
^1School of Mat... | 5 | [
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0.00... | 27,623 | 27623 | |
Frequency-Uniform Decomposition, Function Spaces
Journal of Function Spaces and Applications
Volume 2013 (2013), Article ID 176596, 12 pages
http://dx.doi.org/10.1155/2013/176596
Research Article
Frequency-Uniform Decomposition, Function Spaces , and Applications to Nonlinear Evolution Equations
^1Department of Mat... | 5 | [
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Paramtrization and Line Integral
July 1st 2010, 02:36 PM #1
Newbie
Joined
May 2010
Posts
20
Paramtrization and Line Integral
a) Parametrize the curve $x^{\frac{2}{3}}+y^{\tfrac{2}{3}}=a^{\tfrac{2}{3}}\ \$ in the standard counterclockwise sense.
b) Evaluate $\text{F(x) = (}\tfrac{-1}{\sqrt[{3}]{{y}}}... | 5 | [
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... | 27,625 | 27625 | |
SQL Server 2012 Windowing Functions Part 2 of 2: New Analytic Functions
This is the second half of my two-part article on windowing functions in SQL Server 2012. In Part 1, I explained the new running and sliding aggregation capabilities added to the OVER clause in SQL
Server 2012. In this post, I’ll explain the new T-... | 5 | [
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0.0191650390625,
... | 27,626 | 27626 | |
Regression Proof Question
April 27th 2009, 05:38 PM #1
Newbie
Joined
Apr 2009
Posts
4
Regression Proof Question
Show that Ybar = Yhat bar, that is the average of actual Y values and the average of estimated Y values are the same.
No clue where to start...any help greatly appreciated!
This is no... | 5 | [
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-0.0157470703125,
-0.003692626953125,
-0.07275390625,
-0.05810546875,
0.08056640625,
-0.00518798828125,... | 27,627 | 27627 | |
The Heat Equation
April 18th 2010, 08:28 PM #1
The Heat Equation
Find the Steady State Solution and state the Transient Problem.
$u_t = ku_{xx}$
$0 < x < L$
$t > 0$
Initial Condition: $u(x,0) = f(x)$
a) Boundary Conditions:
$u_x(0,t) = 0$
$u_x(L,t) = -1$
b) Boundary Conditio... | 5 | [
-0.013916015625,
-0.01422119140625,
0.1044921875,
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0.0361328125,
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0.0230712890625,
-0.00531005859375,
0.0240478515625,
0.046875,
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0.0185546875,
-0.068359375,
0.052001953125,
0.03662109375,
-0.0654296875,
-0.16015625,
-0.... | 27,628 | 27628 | |
On a New Cournot Duopoly Game
Journal of Chaos
Volume 2013 (2013), Article ID 487803, 5 pages
http://dx.doi.org/10.1155/2013/487803
Research Article
On a New Cournot Duopoly Game
^1Department of Mathematics, Faculty of Science, University Mansoura, Mansoura 35516, Egypt
^2Department of Basic Science, Faculty of Comp... | 5 | [
-0.07177734375,
0.0269775390625,
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0.08544921875,
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0.0111083984375... | 27,629 | 27629 | |
Quadratic equation question
If x + 1/16x = 1, then the value of 64 x^3 + 1/64^3 is a)4 b)52 c)64 d)76
Is your question: If \displaystyle \begin{align*} x + \frac{1}{16}x = 1 \end{align*} then find the value of \displaystyle \begin{align*} 64x^3 + \frac{1}{64}x^3 \end{align*} or If \displaystyle \
begin{align*} x + \fr... | 5 | [
-0.002349853515625,
0.091796875,
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... | 27,630 | 27630 | |
Hi any Ideas where I went wrong (induction)?
February 23rd 2010, 09:43 AM
Henryt999
Hi any Ideas where I went wrong (induction)?
What is wrong with this solution?(Headbang)
Problem:
Prove that $\frac{1}{2}+\frac{2}{2^2}+\frac{3}{2^3}+...+\frac{ n}{2^n} = 2-\frac{n+2}{2^n}$ for $n=1,2,3,...$
Solution... | 5 | [
-0.11474609375,
0.005859375,
0.042724609375,
0.0859375,
0.03515625,
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0.029052734375,
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0.025634765625,
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0.032470703125,
0.04638671875,
-0.037109375,
0... | 27,631 | 27631 | |
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-... | 4 | [
-0.0986328125,
0.0322265625,
-0.034423828125,
-0.038330078125,
-0.03857421875,
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0.010986328125,
0.056396484375,
-0.126953125,
0.004638671875,
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0.041259765625,
-0.0439453125,
-0.0228271484375,
0.119140625,
-0.045654296875,
-0.01611... | 27,632 | 27632 | |
Complex Projective Synchronization in Drive-Response Stochastic Complex Networks by Impulsive Pinning Control
Discrete Dynamics in Nature and Society
Volume 2014 (2014), Article ID 965297, 8 pages
http://dx.doi.org/10.1155/2014/965297
Research Article
Complex Projective Synchronization in Drive-Response Stochastic Co... | 5 | [
-0.06787109375,
0.00244140625,
-0.0234375,
0.052978515625,
-0.0157470703125,
-0.040771484375,
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0.08349609375,
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0.103515625,
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0.037109375,
-0.058837890625,
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0.03076171875,
0.0235595703125,
-0.03344726562... | 27,633 | 27633 | |
the encyclopedic entry of prime example
In
mathematics
, a
Mersenne number
is a positive integer that is one less than a
power of two
:
$M_n=2^n-1.,$
Some definitions of Mersenne numbers require that the exponent n be prime.
A Mersenne prime is a Mersenne number that is prime., only 46 Mersenne primes are ... | 4 | [
-0.0361328125,
-0.00106048583984375,
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0.0028228759765625,
0.04052734375,
-0.06298828125,
0.02001953125,
0.1181640625,
0.0172119140625,
0.08544921875,
-0.091796875,
0.0625,
0.087890625,
-0.0101318359375,
-0.053466796875,
-0.0296630859375,
-0.046875,
-0.05078125,
0.0... | 27,634 | 27634 | |
-States of the Manning-Rosen Potential by Using Nikiforov-Uvarov Method
ISRN Mathematical Physics
Volume 2012 (2012), Article ID 201525, 20 pages
http://dx.doi.org/10.5402/2012/201525
Research Article
Approximate l-States of the Manning-Rosen Potential by Using Nikiforov-Uvarov Method
Department of Physics, Near Eas... | 5 | [
-0.10693359375,
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0.0244140625,
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0.0250244140625,
-0.0272216796875,
-0.07421875... | 27,635 | 27635 | |
If this is true, what is the probability.
September 20th 2011, 02:28 PM #1
Newbie
Joined
Feb 2011
Posts
10
If this is true, what is the probability.
Question:
Suppose a student is about to take a multiple choice test has only learned 60% of the material covered in the exam. thus, there is a 60% chanc... | 5 | [
0.05419921875,
0.06982421875,
0.01239013671875,
0.07177734375,
-0.060791015625,
0.0159912109375,
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0.050048828125,
-0.0181884765625,
0.06689453125,
0.055908203125,
-0.042236328125,
0.0281982421875,
0.0009918212890625,
-0.0230712890625,
0.0498046875,
-0.059326171875,
-0... | 27,636 | 27636 | |
Routes with exceptions
January 2nd 2013, 08:29 AM #1
Routes with exceptions
As part of a problem I'm trying to solve, I have to find the number of routes from (0,0) to (X,Y) only going up or to the right (both X and Y are positive integers).
I am using central binomial coefficient to find the routes, which i... | 4 | [
0.0634765625,
-0.09130859375,
-0.041015625,
-0.01214599609375,
-0.0067138671875,
0.06982421875,
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-0.01220703125,
0.037109375,
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0.007598876953125,
0.0634765625,
0.028564453125,
0.123046875,
-0.043212890625,
-0.0238... | 27,637 | 27637 | |
Chaitin's construction
From HaskellWiki
(Difference between revisions)
← Older edit Newer edit →
Line 27: Line 27:
[[/Parser|Here is a pa... | 4 | [
-0.134765625,
0.05419921875,
0.1142578125,
0.004058837890625,
0.00469970703125,
-0.08154296875,
0.06640625,
-0.01104736328125,
0.003082275390625,
-0.02099609375,
-0.0203857421875,
-0.005615234375,
0.0291748046875,
-0.005950927734375,
-0.00970458984375,
-0.0172119140625,
-0.0020599365... | 27,638 | 27638 | |
Higher-Order Convergent Iterative Method for Computing the Generalized Inverse over Banach Spaces
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 356105, 5 pages
http://dx.doi.org/10.1155/2013/356105
Research Article
Higher-Order Convergent Iterative Method for Computing the Generalized Inverse over Bana... | 5 | [
-0.0859375,
-0.000431060791015625,
0.031005859375,
0.040283203125,
-0.030029296875,
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0.0228271484375,
0.010009765625,
0.0260009765625,
-0.0286865234375,
0.01177978515625,
0.03125,
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-0.033447265625,
0.0150146484375,
-0.02294921875,
... | 27,639 | 27639 | |
linear algebra- vector-basis-subspace
October 10th 2008, 08:53 AM #1
linear algebra- vector-basis-subspace
Hi,
Tell whether or not the following vectors are linear independent, if they are l.i., say if they generate $\mathbb{R}^3$ or $\mathbb{R}^4$ and in the contrary case characterize implicitly the
subs... | 5 | [
-0.0322265625,
-0.07568359375,
-0.0181884765625,
-0.02685546875,
0.07958984375,
-0.0067138671875,
0.031982421875,
-0.06591796875,
-0.037109375,
-0.0224609375,
0.0172119140625,
-0.046630859375,
0.00186920166015625,
-0.046142578125,
-0.0830078125,
-0.0478515625,
-0.0225830078125,
-0.... | 27,640 | 27640 | |
Another convergence. An interval of convergence.
May 19th 2013, 09:22 AM #1
Newbie
Joined
May 2013
From
Copenhagen
Posts
7
Another convergence. An interval of convergence.
I have to find, for all value of constant $a>0$, the interval of converence of $\sum_{n=0}^{\infty}\frac{x^{n}}{1+a^{n}}$.
Ho... | 5 | [
-0.01611328125,
0.028076171875,
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0.04248046875,
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0.0189208984375,
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0.054443359375,
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0.01483154296875,
0.060791015625,
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-0.004791259765625,
-0.0045166015625,
-0.... | 27,641 | 27641 | |
Basic algebra manipulation
November 7th 2011, 11:09 AM
benny92000
Basic algebra manipulation
Problem: A baseball player travels from his home city, Jasonville, to Giambi City for a baseball game. He drives at m miles an hour. After the game, he flies home instead, traveling at p miles an
hour. If the distanc... | 4 | [
0.0732421875,
0.10400390625,
0.0057373046875,
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0.01190185546875,
0.05126953125,
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0.057861328125,
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0.07958984375,
0.0869140625,
0.0279541015625,
-0.009521484375,
0.099609375,
0.0419921875,
0.06591796875,
0.0216064453125,
0.07470703125,
... | 27,642 | 27642 | |
Very basic moment of inertia question
26-5-7
Find the moment of inertia of a plate covering the region bounded by x = -1, x = 1, y = 0 and y= 1 with respect to x axis.
Basic equation
Ix = k integral (x^2 * y)
x^2 * 1
= x^2
Integrate x^2:
1/3x^3
so the answer is k * 1/3x^3
and ... | 5 | [
0.034423828125,
0.039794921875,
0.0019989013671875,
-0.0244140625,
-0.03271484375,
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0.0162353515625,
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0.0260009765625,
0.046142578125,
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0.008544921875,
0.025146484375,
-0.054931640625,
-0.02001953125,
-0.0299072265625,
-0... | 27,643 | 27643 | |
Homework Help
Posted by Kindell on Tuesday, February 19, 2008 at 1:05pm.
an airplane is flying at a constant altitude of 28000 meters. when first seen to the east of the observer, the angle to the airplane is 71.5 degrees. after 73 seconds, the angle of elevation is 51.6
degrees. find the speed of the airplane.
• m... | 4 | [
0.032470703125,
0.052001953125,
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0.0091552734375,
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0.022705078125,
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0.027587890625,
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0.02734375,
-0.020751953125,
-0.006256... | 27,644 | 27644 | |
the encyclopedic entry of coprime
In
mathematics
, the
integers a
and
b
are said to be
coprime
or
relatively prime
if they have no common
factor
other than 1 or, equivalently, if their
greatest common divisor
is 1. The notation
a
⊥
b
is sometimes used.
For example, 6 and 35 are coprime, but 6 and 27 ... | 4 | [
-0.0517578125,
-0.0308837890625,
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A.1. FLAT NETS: THE MOST PROBABLE HYPOTHESES
Next: A.2. WHY DOES THE Up: APPENDIX - THEORETICAL JUSTIFICATION Previous: APPENDIX - THEORETICAL JUSTIFICATION
Short Guide Through Appendix A.1. We introduce a novel kind of generalization error that can be split into an overfitting error and an underfitting error. To... | 4 | [
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Free Maths Videos For A-Level & GCSE Students
Commutative means that the order of elements contained within an expression do not alter a certain mathematical result.
For example:
$2\cdot 3=3\cdot 2=6\\ \\ 1\cdot 2\cdot 3=2\cdot 1\cdot 3=3\cdot 1\cdot 2=6\\ \\ Or:\\ \\ 1+2=2+1=3\\ \\ 1+2+3=3+2+1=2+1+3=6$
Knowing thi... | 5 | [
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Oil Drilling Manual- Cement
Drilling Calculations - Cement additive calculations
Note: When bentonite is to be pre-hydrated, the amount of bentonite added is calculated based on the total amount of mixing water used.
a) Weight of ... | 5 | [
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0.01... | 27,648 | 27648 | |
Math Help
September 18th 2008, 02:36 PM #1
Newbie
Joined
Sep 2008
Posts
5
polynomial
For what value pf b will the polynomial p(x)=4x^3-3x^2+bx+6 have the same remainder when its divided by x-1 and by x-3?
Can someone help me get this started?
do you know to perform synthetic division?
I t... | 4 | [
-0.076171875,
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-0.046875,
0.000545501708984375,
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0.014221191... | 27,649 | 27649 | |
Examples of Ideals
April 30th 2012, 07:45 PM #1
Member
Joined
Sep 2010
Posts
151
Thanks
1
Examples of Ideals
If i want to find out if {(n,n):n in Z} is an ideal of ZxZ, is there a test or prperties i can apply to prove it is an ideal? My book mentions something about finding a homomorphism? i dont
... | 5 | [
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0.027099609375... | 27,650 | 27650 | |
the encyclopedic entry of continuous function
In
mathematics
, a
continuous function
is a
function
for which, intuitively, small changes in the input result in small changes in the output. Otherwise, a function is said to be
discontinuous
. A continuous function with a continuous
inverse function
is called
b... | 4 | [
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... | 27,651 | 27651 | |
-Laplacian Equation with Sign-Changing Weight Functions
ISRN Mathematical Analysis
Volume 2014 (2014), Article ID 461965, 7 pages
http://dx.doi.org/10.1155/2014/461965
Research Article
Existence of Nontrivial Solutions of p-Laplacian Equation with Sign-Changing Weight Functions
Département de Mathématiques, Faculté ... | 5 | [
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0.0308837890625,
0.09033203125,
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-0.01806640625,
-0.... | 27,652 | 27652 | |
semistable equilibrium solutions
April 18th 2007, 10:18 PM #1
Newbie
Joined
Feb 2007
Posts
9
semistable equilibrium solutions
Hi, I need help on this problem
Sometimes a constant equilibrium solution has the property that solutions lying on one side of the equilibrium solution tend to approach it, w... | 4 | [
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Please Help step by step
$\frac{8^{-1}}{y} + 3^{-1} = -3$ $\frac{1}{8y} + \frac{1}{3} = -3$ I'm going to clear the fractions: The least common multiple of 8y and 3 is 24y. $24y \left ( \frac{1}{8y} + \frac{1}{3} \right ) =
24y \cdot (-3)$ $3 + 8y = -72y$ $3 + 8y - 8y = -72y - 8y$ $3 = -80y$ $y = - \frac{3}{80}$ -Dan
| 4 | [
-0.07080078125,
0.041259765625,
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0.0255126953125,
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Strange BAC-CAB inconsistencies, please help check my answer
August 11th 2011, 02:03 AM #1
Junior Member
Joined
Feb 2008
Posts
71
Strange BAC-CAB inconsistencies, please help check my answer
I'm having problems with strange BAC-CAB inconsistencies which makes me loose faith in my ability of solving these... | 5 | [
-0.1259765625,
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0.0986328125,
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0.0155029296875,
0.0093994140625,
-0.119140625,
0.08837... | 27,655 | 27655 | |
Homework Help
Posted by susanta on Friday, May 20, 2011 at 12:24pm.
find the value of a^3-1/8a^3 ,if a^2+1/4a^2=10
• math - Henry, Friday, May 20, 2011 at 9:38pm
a^3 - a^3/8.
a^2 + a^2/4 = 10.
Multiply both sides by 4:
4a^2 + a^2 = 40,
5a^2 = 40,
a^2 = 8,
a = +-2*sqrt2.
(2*sqrt2)^... | 4 | [
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Fixed and Best Proximity Points of Cyclic Jointly Accretive and Contractive Self-Mappings
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 817193, 29 pages
http://dx.doi.org/10.1155/2012/817193
Research Article
Fixed and Best Proximity Points of Cyclic Jointly Accretive and Contractive Self-Mappings
Ins... | 5 | [
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0.00592041015625,... | 27,657 | 27657 | |
write linear equation and in slope-intercept form
March 21st 2007, 02:17 PM #1
write linear equation and in slope-intercept form
In planning for a new item, a manufacturer assumes that the number of items produced x and the cost in dollars C of producing these items are related by a linear equation. Projections a... | 4 | [
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... | 27,658 | 27658 | |
logic and sets help!!
November 17th 2008, 08:34 AM
srk619
logic and sets help!!
can some plz help me figure this out:
Consider the following collection of statement.:-
If I wash thent.
iii. How many rows would be required by a truth table to show that the
statements are inconsistent?
November ... | 5 | [
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... | 27,659 | 27659 | |
Series summation doubt
December 18th 2010, 01:03 PM #1
Member
Joined
May 2010
Posts
241
Series summation doubt
Hi there. I have some doubts with this exercise. I have to make the summation for:
$\displaystyle\sum_{i=-3}^\infty{(-\displaystyle\frac{1}{3})^i}$
I've solved this way:
$\display... | 5 | [
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... | 27,660 | 27660 | |
Triangle problem
1. March 12th 2009, 03:18 AM #1
2. March 12th 2009, 07:00 AM #2
Hello! I shall do part (a) first...
Have you learnt Cosine Rule?
Basically Cosine Rule states that (in the context of this question):
$AC^2 = AB^2 + BC^2 - 2 (AB)(BC) cos \angle ABC$
Therefo... | 4 | [
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Tough Integral sqrt(x-sqrt(x^2-4))
March 25th 2012, 11:16 AM #1
Newbie
Joined
Mar 2012
From
us
Posts
2
Tough Integral sqrt(x-sqrt(x^2-4))
Ok so I tried U-subbing sqrt(x^2-4), but I didn't get anywhere. Then I though hmm, maybe trig-sub will do the trick, but I also got stuck there. I don't know what'... | 5 | [
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Exact and Analytic-Numerical Solutions of Lagging Models of Heat Transfer in a Semi-Infinite Medium
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 397053, 6 pages
http://dx.doi.org/10.1155/2013/397053
Research Article
Exact and Analytic-Numerical Solutions of Lagging Models of Heat Transfer in a Semi-In... | 5 | [
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Dosage Calculations
1. 2
Dec 11, '04 by
minnielynn
I am in a desperate situation. I thought I was getting my calculations correctly and today I got back my math results and i got a 70%
My professor said that if i get above 95% on my final (which is next week) I may be able to average a b+ or a- , ... | 4 | [
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The Jacobian Consistency of a One-Parametric Class of Smoothing Functions for SOCCP
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 965931, 12 pages
http://dx.doi.org/10.1155/2013/965931
Research Article
The Jacobian Consistency of a One-Parametric Class of Smoothing Functions for SOCCP
^1School of Math... | 4 | [
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-0.001060485839843... | 27,665 | 27665 | |
Finite-Horizon Robust Kalman Filter for Uncertain Attitude Estimation System with Star Sensor Measurement Delays
Abstract and Applied Analysis
Volume 2014 (2014), Article ID 494060, 11 pages
http://dx.doi.org/10.1155/2014/494060
Research Article
Finite-Horizon Robust Kalman Filter for Uncertain Attitude Estimation Sy... | 4 | [
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Does this product converge in any sort of way? • /r/math
you are viewing a single comment's thread.
[–]Shadonra0 points1 point2 points
sorry, this has been archived and can no longer be voted on
[–]Field-K0 points1 point2 points
sorry, this has been archived and can no longer be voted on
Then the answer is yes. R ... | 5 | [
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Homework Help
Posted by Courtney on Saturday, November 13, 2010 at 11:22pm.
Postcard stamps are 20 cents each, while letter stamps are 33 cents each. If you have 50 stamps worth $12.60, how many of each type do you have?
I dont even know where to begin with this Q.
• Math (hard) - Reiny, Saturday, November 13, 201... | 4 | [
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Laguerre's Differential Equation
September 18th 2010, 08:51 AM
11rdc11
Laguerre's Differential Equation
I need just a little help with this question. I almost solved it except for a minor detail at the end.
Here is the question.
The equation
$xy''(x) + (1-x)y'(x) +my(x) = 0$,
where m is a non... | 5 | [
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-0.0... | 27,669 | 27669 | |
triangle vertices
March 6th 2007, 10:08 PM #1
Senior Member
Joined
Jan 2007
Posts
477
triangle vertices
FInd the area of the triangle whose verices are P(1, 1, -1), Q(1, -1, 1) and R(-1, 1, 1)
really need some help find the area for this problem please.
Hello, rcmango!
FInd the area of the... | 4 | [
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al
Home Companion Notes Print | Comment
Home
Common Compounds
Exam Guide A checklist of concepts to learn and skills to master in this section.
FAQ Prerequisite skills and concept... | 4 | [
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Unknown Input Observer Design for Fuzzy Bilinear System: An LMI Approach
Mathematical Problems in Engineering
Volume 2012 (2012), Article ID 794581, 21 pages
http://dx.doi.org/10.1155/2012/794581
Research Article
Unknown Input Observer Design for Fuzzy Bilinear System: An LMI Approach
^1Laboratoire des Systèmes Avan... | 4 | [
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Position, Velocity, Acceleration problem
March 5th 2010, 01:47 PM #1
Newbie
Joined
Sep 2009
Posts
11
Position, Velocity, Acceleration problem
A particle moves along the $x-axis$ so that at any time $t \geq 1$ its accelaration is given by $a(t)= \frac{1}{t}$. At $t=1$, the velocity of the particle is $v(1... | 4 | [
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0.018798828125,
0.0120849609375,
... | 27,673 | 27673 | |
Squeeze Theorem
September 7th 2010, 05:13 PM
shmiks
Squeeze Theorem
During class today we started covering some stuff that had me totally lost. We were covering The squeeze theorem and I was doing really good up until
lim xsin 1/x
I haven't the faintest idea what he did or how to repeat it. Can anyone gi... | 4 | [
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-0.0... | 27,674 | 27674 | |
Newton's method
Use Newton's method to approximate the given number correct to eight decimal places 130Radical130
Use the Newton method to approximate $\sqrt{130}$ , then multiply this approximation with 130 . then let $x=\sqrt{130}$ square them , and let $f(x)=x^2-130$ then find f'(x) , and let the initial
approximat... | 4 | [
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-0.026611... | 27,675 | 27675 | |
Slope of line , Equation Problem
I got Point P(9,-1) , M(slope)=Fraction 2/3 when i get to do -1=(fraction)2/3(9) I don't know what to do help!!.
The slope of the tangent line: $\displaystyle y-y_1=m(x-x_1)\rightarrow y-(-1)=\frac{2}{3}(x-9)\rightarrow y=\frac{2x}{3}-6-1=\frac{2x}{3}-7$ $\displaystyle \frac{2*9}{3}=\f... | 4 | [
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0.1328125,
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-0.00701904296875,
0.067... | 27,676 | 27676 | |
Multiple Positive Solutions of a Singular Semipositone Integral Boundary Value Problem for Fractional
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 643571, 12 pages
http://dx.doi.org/10.1155/2013/643571
Research Article
Multiple Positive Solutions of a Singular Semipositone Integral Boundary Value Pr... | 5 | [
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... | 27,677 | 27677 | |
Prove that E is bounded and that sup E and inf E both belong to E.
March 28th 2010, 07:34 PM #1
Member
Joined
Feb 2010
Posts
146
Prove that E is bounded and that sup E and inf E both belong to E.
Let E be compact and nonempty. Prove that E is bounded and that sup E and inf E both belong to E.
For th... | 4 | [
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0.03662109375,
0.004425048828125,
0.00543212890625,
-0.05078125,
0.0048828125,
-0.041748046875... | 27,678 | 27678 | |
For what NEGATIVE values of d is Z[sqrt[d]] a Euclidean domain?
March 1st 2013, 09:19 AM #1
Newbie
Joined
Mar 2013
From
Denmark
Posts
1
For what NEGATIVE values of d is Z[sqrt[d]] a Euclidean domain?
I was asked to prove that the ring Z[sqrt[d]] is not euclidean for any d <= -3. (Note - The resulting... | 5 | [
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... | 27,679 | 27679 | |
ratio of rational numbers to natural pairs
July 25th 2008, 07:34 PM #1
Newbie
Joined
Jul 2008
Posts
16
ratio of rational numbers to natural pairs
Cantor proved the enumerability of rational numbers by creating a chart like the one below
the order crated by the zig-zag allowed the rational number to ... | 5 | [
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0.03... | 27,680 | 27680 | |
Physics Of Bungee Jumping
The Physics Of Bungee Jumping
Photo credit:
Matt Dinnery
The physics of bungee jumping is an interesting subject of analysis. The basic physics behind this activity is self-evident. The bungee jumper jumps off a tall structure such as a bridge or crane and
then falls vertically downward unt... | 5 | [
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0.07... | 27,681 | 27681 | |
System of Equations
March 29th 2009, 04:34 PM #1
Junior Member
Joined
Jul 2008
Posts
49
System of Equations
Please help with the following problem. Thank You!
Two planes leave Pittsburgh and Philadelphia at the same time. Each going to the other city. One plane flies 25mph faster than the other plan... | 4 | [
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0.0281982421875,
0.06005859375,
-0.0267333984375,
0.022216796875... | 27,682 | 27682 | |
How can I find the number of possible outcomes of a playoff between two teams where the first team to win four games wins the playoff? • /r/cheatatmathhomework
all 4 comments
[–]anonemouse20101 point2 points3 points
sorry, this has been archived and can no longer be voted on
First imagine team winner and loser. The ... | 4 | [
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Some New Variants of Cauchy's Methods for Solving Nonlinear Equations
Journal of Applied Mathematics
Volume 2012 (2012), Article ID 927450, 13 pages
http://dx.doi.org/10.1155/2012/927450
Research Article
Some New Variants of Cauchy's Methods for Solving Nonlinear Equations
^1Fundamental Department, Aviation Universi... | 5 | [
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Question 11
December 18th 2006, 06:14 AM
ThePerfectHacker
Question 11
Here are two questions on group theory. Do not worry this is the most elementary group theory, so nothing complicated. Look below, I made a tutorial that explains what a group is in the most
simple terms!
1)Let $G$ be a finite group. ... | 5 | [
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-0... | 27,685 | 27685 | |
Complicated Algebra
November 18th 2008, 10:41 PM #1
Senior Member
Joined
Jul 2008
Posts
347
Hi
The problem I'm struggling with is:
If a and b are real numbers such that a + b is not equal to 0 and b is not equal to 0:
(a) Show that if there is only one real root of the equation x^2 + ax + b... | 4 | [
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HYPOTHESIS TESTING EXAMPLES USING NORMAL DISTRIBUTION
Sanderson M. Smith
... | 5 | [
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0.02075195... | 27,687 | 27687 | |
polar conversion
I can't figure how to convert this polar equation to a cartesian equation. $r = 2 - \sin2\theta$
$r = 2 - \sin 2 \theta$ .............................simplify the double angle sine $\Rightarrow r = 2 - 2 \sin \theta \cos \theta$ .................multiply through by $r^2$ $\Rightarrow r^3 = 2r^2
- 2r \... | 4 | [
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-0.0... | 27,688 | 27688 | |
Robinson Racing Products - The Leader in Gears for RC Cars
Question: I am currently running 48 pitch gears and I know the tooth sizes that perform well in 48 pitch, but I want to change to 64 pitch. How do I convert the the number of teeth on gears from 48
pitch to 64 pitch?
Answer: Good question. The short answer is:... | 4 | [
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0.1259765625,... | 27,689 | 27689 | |
Math Help
June 6th 2010, 02:37 AM #1
Newbie
Joined
May 2010
Posts
11
power series
hi
I know the power series representation of sin x is Sum [ (-1)^n*(x)^(2n+1)/(2n+1)!] but what about (sinx)^2?
another quick question :
give an example of set A that has no supremum and why does it not violat... | 5 | [
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-0.04003... | 27,690 | 27690 | |
Quadratic Inequality
April 7th 2011, 07:22 AM #1
Junior Member
Joined
Sep 2009
Posts
66
Given that $y = tx^2 + 8x + 10 - t$ find the range of values of $t$ for which $y$ is always positive.
The answer depends on both $t$and $x$.
$tx^2 + 8x + 10 - t > 0$
Isolating the variable $t$ produces
... | 5 | [
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0.041015625,
0.0771484375,
-0.06640625,
0.00677... | 27,691 | 27691 | |
Higher-Order Spectrum in Understanding Nonlinearity in EEG Rhythms
Computational and Mathematical Methods in Medicine
Volume 2012 (2012), Article ID 206857, 8 pages
http://dx.doi.org/10.1155/2012/206857
Research Article
Higher-Order Spectrum in Understanding Nonlinearity in EEG Rhythms
^1Medical Image Processing Lab... | 4 | [
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-0.00674438... | 27,692 | 27692 | |
Global Attractors for the Three-Dimensional Viscous Primitive Equations of Large-Scale Atmosphere in Log-Pressure Coordinate
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 758730, 16 pages
http://dx.doi.org/10.1155/2013/758730
Research Article
Global Attractors for the Three-Dimensional Viscous Primitiv... | 4 | [
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-... | 27,693 | 27693 | |
Well-Posedness and Primal-Dual Analysis of Some Convex Separable Optimization Problems
Advances in Operations Research
Volume 2013 (2013), Article ID 279030, 10 pages
http://dx.doi.org/10.1155/2013/279030
Research Article
Well-Posedness and Primal-Dual Analysis of Some Convex Separable Optimization Problems
Departme... | 4 | [
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Absolute Value equation
3 Ix+3I = Ix-3I+2x I used the letter (I) and the line for the absolute value. Thanks for your help.
By the way, your keyboard has a key | that is just above the "enter" key. Use that for absolute value. $3|x + 3| = |x - 3| + 2x$ There are 3 intervals you need to consider: $(-\infty, -3),~(-3, 3... | 4 | [
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-0.12011718... | 27,695 | 27695 | |
injection & surjection proofs
April 14th 2009, 11:31 AM #1
Newbie
Joined
Apr 2009
Posts
7
Here is my problem...
Let A, B, and C be nonempty sets and let f: A→B and g: B→C be functions.
a) Prove that if g ∘ f is an injection, then f is an injection.
b) If g ∘ f is an injection, then must g be a... | 5 | [
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Friction??
December 13th 2007, 05:43 PM
mrjohnson
Friction??
Heres a problem I cant get I've managed to solve equations like this without involving the equation for friction, but this is slightly more taxing, for me...
a ball of mass
m, position x(t) and velocity v(t) = dx/dt, where t is time. The equa... | 4 | [
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0.... | 27,697 | 27697 | |
Vector difficulties
February 24th 2009, 06:48 AM
nickskely
Vector difficulties
I am having some difficulties doing some basic vector questions on an assignment.
a line L1 passes through (1,-1,4) and is parallel to vector (1,-1,1). Another line L2 passes through (2,4,7) and (4,5,10). obtain teh vector lines ... | 4 | [
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-... | 27,698 | 27698 | |
Collaborative Relay Beamforming Strategies for Multiple Destinations with Guaranteed QoS in Wireless Machine-to-Machine Networks
International Journal of Distributed Sensor Networks
Volume 2012 (2012), Article ID 525640, 10 pages
http://dx.doi.org/10.1155/2012/525640
Research Article
Collaborative Relay Beamforming S... | 4 | [
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