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(When) does Schur's lemma break? up vote 6 down vote favorite 3 Edit: I wrote the following question and then immediately realized an answer to it, and moonface gave the same answer in the comments. Namely, $\mathbb C(t)$, the field of rational functions of $\ mathbb C$, gives a nice counterexample. Note that it is of...
4
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2,000
2000
verify that the pair of functions is a solution... January 27th 2011, 05:35 PM slapmaxwell1 verify that the pair of functions is a solution... verify that the pair of functions x = t + e^t , y = te^t is a solution to the system of differential equations. x + y - dy/dt = 1 , x - dx/dt = t - 1. ok so i ...
4
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2,001
2001
st: RE: Stata list example - use of the margins command Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running. [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Threa...
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[ -0.10693359375, 0.0162353515625, -0.07568359375, 0.044189453125, 0.051025390625, 0.0693359375, -0.06591796875, 0.0927734375, 0.0673828125, 0.07763671875, 0.050048828125, -0.01904296875, -0.0091552734375, -0.06787109375, 0.02978515625, -0.057373046875, 0.032470703125, -0.02514648437...
2,002
2002
trig is bad February 23rd 2006, 05:02 PM #1 Newbie Joined Feb 2006 Posts 7 trig is bad To avoid heavy snow loads on the roof, a ski chalet plan calls for a 36*vertical angle. Assuming the width of the base of the chalet to be 14m, determine the slant height of the roof.(The chalet is in the shape of ...
4
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2,003
2003
Perimeter and Area of Rectangles, Triangles, Circles Perimeter and Area of Rectangles, Triangles, Circles by VISHNUPRIYA (AHMEDABAD) Perimeter and Area 1. Find the perimeter and area of a rectangle of length 16 cm and breadth 12.5 cm. a.rectangle | height 16 cm (centimetres) | area Width 12.50 cm (centi...
4
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2,004
2004
Properly Solving a Big O Proof January 21st 2011, 01:09 PM RageD Properly Solving a Big O Proof Hello, I am currently taking a class which is covering a topic which I have not yet had experience with. I have done a lot of research on the topic, and believe to understand the definition well, however, I'm...
5
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2,005
2005
complex analysis question March 25th 2011, 04:05 PM shaheen7 complex analysis question one of the review questions that will help me study for my upcoming exam is as follows. Find all points z in C where the function h(z) = (z + 3)^2+i is differentiable. Find all points where this function is holomorphic. A...
4
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2,006
2006
"Sub" Logarithmic Equations July 7th 2008, 01:26 PM #1 Junior Member Joined Jun 2008 Posts 66 "Sub" Logarithmic Equations I have a TI-83 Plus and I don't know how to make, say: "log 1/3" where the "1/3" is sub to the "log". Any help? First off you have to take the log of something, ex.: $\log_{...
4
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2,007
2007
Proof using linearly independent April 17th 2013, 04:06 PM #1 Junior Member Joined Apr 2012 From New York Posts 30 Proof using linearly independent I'm not sure where to start with this: (these are all matrices -- are supposed to have bars over them, but couldn't figure out how to insert those) ...
4
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2,008
2008
Proof (vectors) January 6th 2008, 07:17 AM #1 Junior Member Joined Jan 2008 Posts 29 Proof (vectors) OK, so I have a proof which I have am having a hard time prooving. Well here it is |a cross b| = ((a dot a) (b dot b) - (a dot b)sqrd) to the power of 1/2 (Also, it seems i have posted in the wrong ...
4
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2009
hyperbolic functions show that Sinh(x+y)=sinhx+Coshxsinhy and using reduction formula: find the integral of cos^n xdx=(SinxCos^n-1 x)/n+(n-1)/n integral of Cos^n-2 xdx Last edited by Count Hesabu; April 15th 2008 at 03:33 AM. Reason: similarity $\sinh x \cosh y + \cosh x \sinh y$ $\frac{e^x - e^{-x}}{2} \frac{e^y + e...
5
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2010
Absolute value inequalities. please check my work if i done correctly. I'm little confused. Remember that $\displaystyle |X| = \sqrt{X^2}$, so I would rewrite this equation as $\displaystyle \sqrt{(2x-6)^2} = \sqrt{(4-5x)^2}$ $\displaystyle (2x- 6)^2 = (4 - 5x)^2$. Solve for $\displaystyle x$. $2x-6$ and $4-5x$ are b...
4
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2011
Homework Help Posted by Steven on Wednesday, August 14, 2013 at 4:29am. How many ordered pairs of integers solutions (x,y) are there to 2x^2+3xy+y^2+2x+y+18=0? • math - Steve, Wednesday, August 14, 2013 at 5:07am 2(x+1/2)^2 + (y+1/2)^2 + 3xy + 18 = 3/4 Obviously either x or y will be negative, since we ne...
4
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2012
Reduction formula problem January 31st 2011, 02:08 PM #1 Member Joined Nov 2008 Posts 114 Reduction formula problem Hi, Here is the problem. The integral $I_n$ is defined by $I_n = \int_0^{\pi}(\pi / 2 - x)\sin(nx + x/2)\mbox{cosec}(x/2) \, \mbox{d}x$ where $n$ is a positive integer. Evalu...
5
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2013
Genetics and Molecular Biology Services on Demand Article Indicators Related links Share Print version ISSN 1415-4757 Genet. Mol. Biol. vol.33 no.3 São Paulo  2010 http://dx.doi.org/10.1590/S1415-47572010000300021  ...
4
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2014
to Level 70, Paragon Level 100 Softcore Monk Build (Last Sync w/ Battle.net: April 13, 2014) Gear / Items Name Controls DPS EHP Gear Stats Perfection (% of Total) (% of Total) Andariel's Visage ~ ~ Helm Vile Ward ...
4
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2015
exponentials October 14th 2010, 11:18 AM batki610 exponentials Without a calculator how would I calculate multiplication exponential expression The formula is a^x a^ y = a ^x+ y (7 x 10^ 2) x (4 x 10 ^ 5) i thought the answer would be 28 x 10^ 7 but the answer key has 2.8 x 10 ^ 8 so what am I ...
4
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2,016
2016
What radius would equal 24(pi) times this radius? September 1st 2012, 08:30 AM #1 Newbie Joined May 2012 From daytona beach Posts 5 What radius would equal 24(pi) times this radius? For my algebra class, this is the only question im stuck on this section: Grain silos can be described as a hemisp...
4
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2017
Finding the equation of a tangent line October 22nd 2013, 03:30 PM #1 Junior Member Joined Oct 2013 From USA Posts 34 Finding the equation of a tangent line The equation of the paraboloid is given as z=x^2+y^2 at the point x+1 and y=2, and I was wondering how to figure out the equation of the tangent...
5
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2018
Integral of 1/(1+4x^2) May 6th 2009, 12:57 PM #1 Junior Member Joined Jan 2009 Posts 26 Integral of 1/(1+4x^2) Problem: $\int \frac{dx}{1+4x^2}dx$ Attempt: $4x = tan(\theta)$ $dx = \frac{d\theta}{cos^2(\theta)}$ $\int \frac {d\theta}{(1+tan^2(\theta))*cos^2(\theta)}$ $\int \f...
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2019
Re: st: calculating effect sizes when using svy command Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running. [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Threa...
4
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2020
What value of p does the following series converge December 19th 2012, 04:27 PM MSUMathStdnt What value of p does the following series converge A Theorem say the $p$-series $\sum_{n=2}^\infty \frac {1}{n^p}$ converges if $p>1$ and diverges otherwise. The question says "Find the positive values of $p$ for wh...
5
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2021
The Physics of Gamma-Ray Bursts - Tsvi Piran B. Particle Acceleration It is now generally accepted that Cosmic rays (more specifically the lower energy component below 10^15 eV) are accelerated within shocks in SNRs is the Galaxy (see e.g. Gaisser [117]). A beautiful demonstration of this effect arises in the observat...
4
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2022
Steady State Sinusoidal Transient Analysis University of Evansville ...
5
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2023
SparkNotes: SAT Subject Test: Math Level 1: Absolute Value 5.1 Math IC Algebra Strategies 5.8 Common Word Problems 5.2 Writing Equations 5.9 Logarithms 5.3 Manipulating Equations 5.10 Polynomials 5.4 Zero Product 5.11 Key Formulas 5.5 Absolute Value 5.12 Review Questio...
4
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2024
Cjs 240 Appendix • 240 Week 3 Checkpoint Sociological Theories Response, CJS 240 Week 3 DQ 1 and DQ 2, CJS 240 Week 4 Checkpoint Case Study Critique Checkpoint (Appendix C), CJS 240 Week 4 Assignment Gender and Family Assignment, CJS 240 Week 5 Checkpoint The Justice Systems (Appendix D), CJS 240 We...
5
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Homework Help Posted by Rose on Tuesday, March 18, 2014 at 5:02am. a clock has a dial face of 12 inches radius the minute hand is 9 inches while the hour hand is 6 inches the plane of rotation of the hour hand is 2 inches above the plane of rotation of the minute hand. Find the distance between the tips of the minute ...
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Perpendicular bisectors and centres of circles March 6th 2009, 06:09 AM #1 Newbie Joined Aug 2008 From Near London Posts 19 Perpendicular bisectors and centres of circles Hi hope someone can help me? The question concerns three points A (3,1) B (-1,-11) and C (-5,9) that a circle passes through....
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2027
Math Help January 8th 2011, 07:40 PM #1 MHF Contributor Joined Mar 2010 From Florida Posts 3,093 Thanks 5 u_x-u_y+u=1 $u_x-u_y+u=1$ Auxiliary condition $u(x,0)=\sin{x}$ $u(x,y)=u(\xi\cos{\alpha}-\eta\sin{\alpha},\xi\sin{\alpha}+\eta\cos{\alpha}) =\omega(\xi,\eta)$ $u_x=\omega_{\xi...
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2028
M Standard Tire Tire body used to determine the normal force and kinematic parameters required by the tire force and moment components The Standard Tire component internally calculates the kinematic tire parameters and the tire normal force required by the Linear, Calspan, Fiala, and Pacejka force and moment componen...
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integrate using substitution x = 2sec@ April 2nd 2010, 03:47 AM differentiate integrate using substitution x = 2sec@ Integrate sqrt (x^2 -4) using the substitution x = 2sec@ I had: x = 2sec@ dx = 2sec@tan@ sqrt (4sec^2 @ -4) x 2sec@tan@ d@ = 4tan^2 @ sec@ and now I'm stuck. T...
4
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Homework Help Posted by John on Wednesday, January 25, 2012 at 8:44pm. Lines M and T are parallel with a Transversal line P. [Labeling for the angles on line P intersecting M are, top right corner is angle 1, the top left is angle 2, the bottom left is angle 3, and the bottom left is angle 4. This pattern {top left, t...
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Graphs help? January 2nd 2013, 12:46 AM #1 Newbie Joined Jan 2013 From Birmingham Posts 2 Graphs help? The graph above shows the variation of voltage, V volts, with time, tseconds, for an electronic device which monitors heat transfer. It is knownthat the way V depends upon t is a sinusoidal osci...
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Hypothesis Testing: Neyman Pearson Lemma March 18th 2009, 10:24 PM kingwinner Hypothesis Testing: Neyman Pearson Lemma Suppose that Y1,Y2,...,Yn are iid Poisson(lambda) We want to test Ho:lambda=lambda_o vs Ha:lambda=lambda_a (where lambda_a>lambda_o) Using the Neyman Pearson Lemma, find the most powerfu...
5
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Elementary mechanics Posted by jane on Sunday, July 14, 2013 at 3:12pm. A force of 2i+7jN acts on a body of mass 5kg for 10 seconds. The body was initally moving with constant velocity of i-2jm/s.Find the final velocity of the body in m/s, in vector form. (a)5i+12j(b) 12i-5j(c)10i-7j(d)7i+10j • Elementary mechanics...
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Extracting countable chains from linear orders up vote 7 down vote favorite 1 There is a well-known fact in infinite combinatorics asserting that for each infinite linear order $P$ there is a countable subset $R\subseteq P$ of order type either $\omega$ or $\omega^{*}$ (by $\omega^{*}$ I mean set of natural number wi...
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Practical Foundations of Mathematics Paul Taylor 8.3 Display Categories and Equality Types This section investigates the semantic structure ne...
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or How to calculate the equations of the normal and tangent lines to a function at a given point. This topic is part of the TCS FREE high school mathematics 'How-to Library', and will help you to calculate the equations of the normal and tangent lines to a function ...
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conundrum August 16th 2006, 07:54 PM wardreese conundrum I originally was presented with this conundrum as a challenge on a website, but the time limit has passed to present an answer. Still, I am not sure how to solve the conundrum. The Farmer has 3 fields. One field is an equilateral triangle. One field is...
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Field, Subspace, Basis, Dim May 6th 2009, 04:18 AM #1 Junior Member Joined Sep 2008 Posts 47 Field, Subspace, Basis, Dim Let $\mathbb{F}$ be a field and let n be a fixed positive integer. Define $U_n = \lbrace A \in M_n ( \mathbb{F}) | A_{ij} = 0 \ \forall \ i > j \rbrace$. (1) Prove that $U_n$ is a...
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Homework Help Posted by Danny on Tuesday, June 16, 2009 at 9:54am. 1. Use half-angle identity to find the exact value of cos165. MY ANSWER: (-1/2)sqrt(2+sqrt(3)) 2. Solve 2 sin x + sqrt(3) < 0 for 0<= x<2pi. MY ANSWER: (4pi/3)< x < (5pi/3) 3.Write the equation 2x+ 3y-5=0 in normal form? (-2sqrt(13)/13)x - (3sqrt(...
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mod questions February 25th 2008, 12:08 PM #1 Newbie Joined Feb 2008 Posts 2 mod questions Show that 5^e +6^e is congruent 0 (mod 11) for all odd numbers e Prove that 6(4^n) is congruent 6(mod 9) for any n>=0 $x^n + y^n = (x+y)(x^{n-1}-x^{n-2}y+x^{n-3}y^2-...)$ where $n$ is odd. for $n...
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Annu. Rev. Astron. Astrophys. 1994. 32: 371-418 Copyright © 1994 by . All rights reserved 2. GRAVITATIONAL INSTABILITY This section provides a brief account of the standard theory of GI, and of the linear and quasi-linear approximations which serve the analysis of motions. Let x, v, and [g] be the position, p...
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Maclaurin series August 4th 2009, 11:50 AM #1 Senior Member Joined Jun 2009 Posts 251 Maclaurin series Find the Maclaurin series (don't show that Rn(x)-->0). Also find the radius of convergence: $(1+x)^{-3}$ So I got the first few terms: $(1)^{-3}-\frac{3(2)^{-4}}{2!}x+\frac{12(3)^{-5}}{3!}x^2-\...
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Homework Help Posted by Melanie on Tuesday, February 15, 2011 at 6:08pm. I need help with two problems. Just want to make sure that the answers I put are correct. 1) Which of the following is an equation of a vertical line? F. 4x + 5y = 0 G. -4 = 16x H. 3y = -9 I. 4x + 5y = -1 2) Which equation is the equation o...
4
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Homework Help Posted by Jerome on Sunday, June 23, 2013 at 5:00pm. According to the American Automobile Association (AAA), the mean cost of a gallon of regular unleaded fuel in 2007 was $2.835. AAA noted that the standard deviation of the fuel price was $0.15. A random sample of n=100 gas stations is selected and the ...
4
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Logarithmic and Exponential functions August 3rd 2012, 07:19 PM #1 Member Joined Jun 2012 From Australia Posts 86 Logarithmic and Exponential functions Hello, Not sure if this is in the right forum - feel free to move it. I have a question from my textbook that is throwing me off a bit. ...
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Help with problem December 8th 2008, 01:16 AM #1 Newbie Joined Dec 2008 From mzumbe Posts 1 A man drives from Mzumbe to Kibaha,a distance of 48km in 45min. Where the surface is good he drives at 72km/h, where the surface is bad he drives at 48km/h. Find the number of kms of good surface. Let ...
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Determination of the Dimensionless Schmidt Number for Gases and Liquids using Matlab Functions Schmi...
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Wave optics Chapter 32. Wave optics Electron microscopes can make images of individual atoms, but why will a visible-light microscope never be able to? Stereo speakers create the illusion of music that comes from a band arranged in your living room, but why doesn't the stereo illusion work with bass notes? Why are com...
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Absolute continuity (measures): finiteness October 31st 2012, 03:28 AM #1 Junior Member Joined Oct 2012 From Bonn Posts 46 Thanks 1 Absolute continuity (measures): finiteness Hi there I don't know how to solve this exercise: """" Let $\mu, \lambda$ be two measures on the borel set wi...
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Math Help April 27th 2011, 10:17 AM #1 Newbie Joined Apr 2011 Posts 5 std dev Wanted to calculate the standard deviation manually quickly on quite a few data points. The data points is similar to below Column1 Column 2 1.2 1.3 1.3 0.8 0.8 0.5 0.5 1.3 1.3 1.6 1.6 1.1 ...
5
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Homework Help Posted by George on Tuesday, September 13, 2011 at 11:24pm. The value of 25 coins, consisting of dimes and quarters, is $ 3.55. How many dimes are in the collection? • Math - JJ, Wednesday, September 14, 2011 at 12:06am 18 dimes = 1.80 7 qtrs = 1.75 Total = the $3.55 Can you work it ...
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Mathmatica help, Riemann Sums December 2nd 2009, 01:12 PM Kimmy2 Mathmatica help, Riemann Sums Let f(x)=100 (x-1)^3e^-x^2. We want to approximate the value of the integral f(x) from .6 to 1.5 (a) Using Mathematica, create a table of the Simpson's Rule approximations for each of the following n: 3, 6, 12...
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Problem with basic Linear Congruence September 17th 2007, 09:23 PM BruceBronson Problem with basic Linear Congruence Hi, I'm trying to find all solutions to the equation 4871x=(mod7642) (congruent with). Using the euclidian algorithm on these numbers i get, 1 = 615 * 4871 - 392 * 7642. (Writing 1 as a linea...
5
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Brazilian Journal of Infectious Diseases Servicios Personalizados Articulo Indicadores Links relacionados Compartir versión impresa ISSN 1413-8670 Braz J Infect Dis v.8 n.4 Salvador ago. 2004 http://dx.doi.org/10.1590/S1413-86702004000400007  ...
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Tangent line and velocity problems October 5th 2008, 04:25 PM #1 Newbie Joined Sep 2008 Posts 24 Tangent line and velocity problems I'm having some trouble with some of these. It's kinda one of those times where you're doing great in class and then you leave and can't remember anything 1. If a rock ...
4
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Motion problem January 18th 2007, 07:53 PM crazirani Motion problem Hi everyone, How would I solve this please? Thanks. Janet drove for 30 miles at 30 miles per hour and the remaining 30 miles at 60 miles per hour. What is her average rate of speed? January 18th 2007, 07:58 PM ThePerfectHacker ...
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Free fall Word Problems Home Brain Bites - B. Free fall - falling where the only force is gravity (no friction) 1. Free fall Wo...
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Homework Help Posted by Linda on Monday, November 14, 2011 at 4:32pm. Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this. 3x – 15y = -12 3x + 24y = -12 • algebra - Reiny, Monday, November 14, 2011 at 6:46pm Rather than substitutio...
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DeMoivre's theorem January 14th 2007, 09:25 PM mike1 DeMoivre's theorem I have this problem and I want to make sure I understand it. Use DeMoivre's theorem to write [3cis(pi/2)][squared] in the form a + bi without trigonometric functions. January 15th 2007, 03:52 AM Soroban Hello, Mike! Quote: ...
5
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Supply and demand function? April 16th 2008, 09:23 AM #1 Newbie Joined Mar 2008 Posts 15 Supply and demand function? Let S and D be the supply and demand functions, respectively, for a particular item; also let these be functions of price as follows: S(p)= -1000 + 2500p, D(p)=9000 - 2000p. The equilibriu...
4
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Fundamental Theorm of Calculus October 6th 2008, 11:00 AM #1 Junior Member Joined May 2008 Posts 56 Fundamental Theorm of Calculus I understand it for the most part and have got the previous problems, but this one is throwing me off quite a bit. The question is to find the derivative using FTC part 1. ...
5
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Trigonometry March 16th 2009, 11:02 AM #1 Super Member Joined Jun 2008 Posts 829 Trigonometry A man begin the trip when the hands of the clock are attached between 8 and 9 hours; the journey ends when the child pointer is between 14 and 15 hours and the pointer larger is 180° the other. How long the ...
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Memememe by Samuellt 3-36. CVP Analysis and Price Changes: Argentina Partners. a. Compute the volume in units and the dollar sales level necessary to maintain the present profit level, assuming that the maximum price increase is implemented. 59,365 units or sales of $1,959,045 (see calculations below) Current profit ...
4
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A More Elegant View of the Correlation Coefficient One of the first things students learn in statistics is the "correlation coefficient" r, which measures the strength of the relationship between two variables. The formula given in most textbooks is something like the following: $r=\frac{\sum (x-\bar{x})(y-\bar{y})}{...
4
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st: RE: RE: RE: Including a matrix in a monte carlo simulation [Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index] st: RE: RE: RE: Including a matrix in a monte carlo simulation From "Nick Cox" <n.j.cox@durham.ac.uk> To <statalist@hsphsun2.harvard.edu> Subject st: RE: RE: RE: Including...
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Calculus Voulme Posted by Laurie on Thursday, July 19, 2012 at 6:47pm. find the volume of the solid generated by revolving the region r bounded by the graphs of the given equations about the y-axis. x^2+y^2=1 x=1 y=1 • Calculus Voulme - Reiny, Thursday, July 19, 2012 at 9:57pm I see a cylinder of radius 1 a...
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Show that T is surjective November 19th 2011, 03:46 AM #1 Junior Member Joined Mar 2010 Posts 62 Show that T is surjective Let $(X,d)$ be a compact metric space, and let $T: X \longrightarrow X$ be a continuous map satisfying the expansion property: $d(T(x),T(y)) \geq d(x,y)$ for all $x,y \in X$. ...
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clusters of coloured particles up vote 1 down vote favorite 1 Is the following a standard problem in combinatorics? Where can I find reference for it? Consider $n$ particles in a circle, $k$ white and $n-k$ black, otherwise indistinguishable so that the number of dispositions is $n!/(n-k)!k!$. Different dispositions ...
5
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Vector Calculus. December 9th 2008, 05:00 AM Daithi Vector Calculus. If A = t2i - tj + (2t + 1)k and B = (2t 3)i + j - tk, evaluate at t = 1, (i) d/dt(A x B) (ii) d/dt(A xdB/dt) i, j, k are vectors It's the working I need help with. I get confused when it comes to differentiating th...
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sicp-ex-2.63 a. The trees shown in figure 2-16 can be written as: (define fig2-16-1 '(7 (3 (1 () ()) (5 () ())) (9 () (11 () ())))) (define fig2-16-2 '(3 (1 () ()) (7 (5 () ()) (9 () (11 () ()))))) (define fig2-16-3 '(5 (3 (1 () ()) ()) (9 (7 () ()) (11 () ())))) Using either function, the trees all evaluat...
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About a basic property of the Laplace Transform... September 17th 2009, 01:18 AM chisigma About a basic property of the Laplace Transform... I suppose is well known to you the so called 'Final value theorem' , connected to the Laplace Trasform: If... $f(s) = \mathcal{L} \{\varphi (t)\}$ ... then i...
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U-substitution with integrals May 14th 2013, 01:00 AM #1 Junior Member Joined Jul 2012 From Bergen, Norway Posts 55 U-substitution with integrals Hello. I have been working with U-substitution the last two days, and things have been fine, until I got to a certain problem. I went about it the sam...
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Help with integration September 6th 2010, 11:42 AM #1 Newbie Joined Sep 2010 Posts 2 1) Integral {(x^3)-4x}/{(x^2)+1}^2.what Is The Solution? 2) Integral {x^(1/2)}dx/{1+ X^(1/4)}.what Is The Solution? Please help me out.i require detailed solutions. thaking you. 1) Use partial fractions....
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find or evaluate the integral September 25th 2010, 09:22 AM #1 Junior Member Joined Feb 2010 Posts 52 find or evaluate the integral Hi $\displystyle \int \frac{1}{1 + \sqrt{x}}~dx$ I have tried multiplying the numerator with $+\sqrt{x}$ and $-\sqrt{x}$ to factor out the denominator and got stuc...
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Vector Calculus: Green's Theorem on a Square February 1st 2013, 09:48 AM #1 Newbie Joined Feb 2013 From Brazil Posts 4 Vector Calculus: Green's Theorem on a Square I have a square described by the following eq: x=0, x=1, y=0 and y=1. I'm computing the Green's Theorem for the function (e^y)dx+(2x...
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[SOLVED] A point that divides a line segment in a given ratio in polar March 17th 2010, 06:22 AM #1 Newbie Joined Mar 2010 Posts 13 [SOLVED] A point that divides a line segment in a given ratio in polar Say we are given the Cartesian points P1=(x1, y1) and P2=(x2, y2). P1-------------------P3-------...
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Orthogonal vectors and the Pythagorean theorem December 4th 2009, 10:55 PM #1 Orthogonal vectors and the Pythagorean theorem Problem statement: The Pythagorean theorem asserts that for a set of $n$ orthogonal vectors ${x_i}$, $||\sum^{n}_{i=1}x_i||^2 = \sum^{n}_{i=1}||x_i||^2$ (a) Prove this in the c...
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Find all integer numbers Find all integer numbers (x,y,z) : $<br /> x^{3}+y^{3}+z^{3}=2008<br />$ Sometimes I prefer brute force over deriving the solution in a creative way... This is one of those times. We must have $x,y,z<\sqrt[3]{2008}\approx12.615987<13$ so there are only finitely many cases to consider. I wrote ...
4
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Solution by characteristic value method question December 12th 2008, 06:19 AM #1 Junior Member Joined May 2008 Posts 50 Solution by characteristic value method question I want to find the solution by characteristic value of: 1 -1 -1 0 1 3 0 3 1 I understand how to get the eigen values ...
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Prove that 2|(n^4 - 3) if and only if 4|(n^2+3) October 10th 2013, 08:07 AM #1 Junior Member Joined Sep 2013 From United States Posts 67 Thanks 3 Prove that 2|(n^4 - 3) if and only if 4|(n^2+3) Course: Foundations of Higher Mathematics Prove that $2|(n^4 - 3)$ if and only if $4|(n^2+3)$ ...
4
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Proposition 17 Lemma. If to any straight line there is applied a parallelogram but falling short by a square, then the applied parallelogram equals the rectangle contained by the segments of the straight line resulting from the application. Apply to the straight line AB the parallelogram AD but falling short by the s...
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Examples of Recursion What are the Towers of Hanoi? Is the end of the world near? At a monastery in the city of Hanoi, Vietnam, a group of monks has made it their life's work to solve the Towers problem, known due to its location as the Towers of Hanoi. Legend has it that the world will end when the monks finally solv...
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Data Mining in A Nutshell # The following code may look rough, but simply paste into R or # a text editor (especially Notepad++) and it will look # much better. # PROGRAM NAME: MACHINE_LEARNING_R # DATE: 4/19/2010 # AUTHOR : MATT BOGARD # PURPOSE: BASIC EXAMPLES OF MACHINE LEARNING IMPLEMENTATIONS IN R # DATA US...
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Homework Help Posted by Anneliese on Wednesday, February 25, 2009 at 2:39pm. Solve the following system of linear equations: 2x - 3y + 6z = -12 5x + 2y - 8z = 29 7x + 6y + 4z = 49 First, I did elimination for the first two equations. I multiplied the first equation by two, and the second equation by 3. 4x - 6y + ...
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gcd Lemma July 2nd 2010, 03:52 PM Demandeur gcd Lemma Prove that if $a = qb+r$ for $q, b, r \in \mathbb{Z}$, then $\gcd(a, b) = \gcd(b, r)$. Let $n$ be any common divisor of $a$ and $b$. Then we have $n\mid{a}$ and $n\mid{b}$ therefore $n\mid{a-qb} \Rightarrow n\mid{r}.$ Similarly, let $m$ be any common div...
4
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Dynamical Systems in Number Theory and Linear Algebra I have been reading Joseph Silverman’s new book on arithmetic dynamics lately. There’s a lot of really fascinating stuff in there, including a large number of potential research problems that are currently way beyond me, but I’ll continue thinking about them! Most i...
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Latin American applied research Servicios Personalizados Articulo Indicadores Links relacionados Bookmark versión impresa ISSN 0327-0793 Lat. Am. appl. res. v.33 n.3 Bahía Blanca jul./sept. 2003   Modeling molecular weight distribution, vinyl content and branching in the reactive extrusion of high density polye...
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Method of variation of parameters May 6th 2009, 11:35 AM #1 Method of variation of parameters The question goes... Find the general solution of this differential equation, given that a solution of the corresponding homogeneous equation is $y=x$, $x^2y''+x(x-2)y'-(x-2)y=x^3$ I've checked that $y=x$ i...
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infimum and supremums January 15th 2008, 08:49 PM alexmin infimum and supremums We showed in class that sqr root 2 is not rational, i.e., that there is no rational number y such that y^2= 2. The aim of this problem is to show that there exists a positive real number y such that y^2= 2. Let A ...
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Prove the limit of this sequence exists October 14th 2010, 01:13 PM #1 Junior Member Joined Oct 2009 Posts 60 Prove the limit of this sequence exists Hi, I'm having a little bit trouble applying the Monotone Sequence Theorem to this question: Determine if the sequence defined by the recursive relati...
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Homework Help Posted by Zisis on Wednesday, January 16, 2013 at 3:02pm. Suppose that function f:[0,2]->R is continuous at [0,2], differentiable at (0,2) and such that f(0)=0, f(1)=1 and f(2)=1. a) Show that there is a x1 that belongs to (0,1) such that f'(x1)=1. b) Show that there is a x2 that belongs to (1,2) such ...
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Repeated measures/proc mixed/polynomials A New View of Statistics © 1998 Will G Hopkins Go to: Previous · Contents · Search · Home REPEATED MEASURES WITH PROC MIXED: FITTING POLYNOMIALS /* Fitting polynomials to repeated measures data. (Use polynomials only if it's appropriate to fit curves.) Example for one withi...
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Homework Help Posted by Yuli on Monday, November 21, 2011 at 4:44am. given sinθ=-5/13 and π<θ<3π/2 find sin2θ cos( θ-4π/3) sin(θ/2) can some1 please help me with this? • mathematics - Steve, Monday, November 21, 2011 at 5:13am Let's go through this again. θ is in the 3rd quadrant, so x and y are both n...
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Logarithmic Functions, Radioactive Decay. March 25th 2013, 11:46 PM #1 Newbie Joined Feb 2013 From Nebraksa Posts 11 Logarithmic Functions, Radioactive Decay. The half-life of radium is 1,690 years. how long will it take for a 50-gram sample of radium to be reduced to 5 grams? The answer should be 5,...
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Word problem assistance needed September 11th 2012, 10:16 AM #1 Newbie Joined Sep 2012 From TX Posts 1 Hello and good day: I'm a homeschool mom and need a bit of help. I am not a math wiz and wish I were. I have some difficulty remembering how to do some things in math and could use assistance. I...
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integration by parts July 25th 2009, 12:57 PM #1 Newbie Joined Jul 2009 Posts 1 integration by parts Please can you help with the following: Q1) find dy/dx when y=(5x² + 2)³(3x - 1)² Q2) with the help of integration by parts find: ∫ (2x+1) ln x dx many thanks for any help gi...
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Homework Help Posted by Anonymous on Sunday, January 29, 2012 at 5:56pm. an airplane was moving with a velocity equal to 300 mph when the velocity was increased with uniform acceleration to 600 mph in 5 min. calculate the number of miles the airplane traveled during that interval of time • engineering - Henry, Tues...
4
[ 0.040771484375, 0.0281982421875, -0.03369140625, 0.011962890625, -0.0167236328125, 0.03466796875, -0.08349609375, 0.0047607421875, -0.030517578125, 0.0291748046875, 0.099609375, -0.03515625, 0.0225830078125, -0.00848388671875, -0.052978515625, 0.0240478515625, 0.0120849609375, -0.0...
2,098
2098
help me out October 27th 2005, 06:29 PM bwalters302 help me out I need to find the discriminant of the equations and give the number and type of solutions of the equation?? Please help x^2 + 6x - 16 =0 2x^2 + 5x - 7=0 October 28th 2005, 08:07 AM edcity Quote: Originally Posted by bwalt...
4
[ -0.012939453125, -0.0255126953125, 0.018310546875, -0.037841796875, 0.0341796875, 0.04052734375, -0.016357421875, 0.06494140625, 0.0020904541015625, -0.002410888671875, 0.11279296875, -0.031982421875, -0.01611328125, 0.055908203125, -0.059814453125, 0.0478515625, -0.01495361328125, ...
2,099
2099