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Sparse Cumulants Fitting for Direction-of-Arrival Estimation without Redundancy International Journal of Antennas and Propagation Volume 2013 (2013), Article ID 897158, 7 pages http://dx.doi.org/10.1155/2013/897158 Research Article Sparse Cumulants Fitting for Direction-of-Arrival Estimation without Redundancy Key L...
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Solutions for Chapter 4 Introduction to Automata Theory, Languages, and Computation Solutions for Chapter 4 Solutions for Section 4.1 Solutions for Section 4.1...
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Homework Help Posted by Jade on Monday, October 10, 2011 at 9:51pm. Define the quotient rule. • Calculus - Steve, Tuesday, October 11, 2011 at 12:12am If f and g are functions of x d/dx(f/g) = (f'g - fg')/g^2 This is just a variation of the well-loved product rule, where f/g = f * g^-1 d/dx(f * ...
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Contour within Contour June 9th 2007, 06:11 PM #1 Global Moderator Joined Nov 2005 From New York City Posts 10,616 Thanks 9 Contour within Contour Let $f(z)$ be a complex function defined on an open non-empty set $S$. Let $\gamma (t)$ be a contour wholly inside $S$. Does there exist another conto...
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need help variance of poisson dist. July 5th 2008, 03:37 AM #1 Newbie Joined Jul 2008 Posts 2 need help variance of poisson dist. Can anyone provide a proof for the variance of poisson distribution? Show that it is Var(N(t)) = lamda*t without using the Bernoulli distribution and independence way..( w...
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Homework Help Posted by weloo_volley on Tuesday, May 8, 2012 at 6:18pm. weloo. Consider the function f(x)= -cos3x -4sin3x. (a)Find the equation of the line normal to the graph of f(x) when x= pie/6 . (b)Find the x coordinates of the points on the graph of f(x) where the tangent to the graph is horizontal. (c)Find ...
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proving that the euler totient function is multiplicative if (m, n) = 1 September 30th 2011, 05:57 PM #1 Member Joined Aug 2008 Posts 249 proving that the euler totient function is multiplicative if (m, n) = 1 i start by showing that there is a one to one correspondence between $\mathbb{Z}_{mn}$ and $\ma...
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Real-Time Pricing-Based Scheduling Strategy in Smart Grids: A Hierarchical Game Approach Journal of Applied Mathematics Volume 2014 (2014), Article ID 329656, 8 pages http://dx.doi.org/10.1155/2014/329656 Research Article Real-Time Pricing-Based Scheduling Strategy in Smart Grids: A Hierarchical Game Approach ^1Scho...
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Math(Please help) Posted by Hannah on Friday, April 29, 2011 at 5:57pm. Evaluate: f(x,y)=2x^3e^y a) partial derivative with respect to x. I know that you have to treat y as a constant but I have no idea what to do. I do not understand partial derivatives at all. Please help!! b) partial derivative with repsect to y...
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Research August 2006 <<July August September>> Answer: Let the demand for the contract from A and B be a and b respectively. Negative values of a or b correspond to a desire to sell the contract short. Expected log wealth for A will is p*log(X+a*(1-r))+(1-p)*log(X-a*r) This has derivative with respect to a of p*...
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Topology Closed Neighborhood Proof September 13th 2012, 04:59 PM Kiefer Topology Closed Neighborhood Proof (8) N is a closed neighborhood of p in R_U iff N=R Where R represents the real numbers and R_U is the upper topological space for the real numbers (R, T_U) T_U = {A is a subset of R | a is an el...
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Homework Help Posted by Emma on Thursday, July 3, 2014 at 10:35pm. The vertex of the graph of a quadratic function is (3, 1) and the y-intercept is (0, 10). Which of the following is the equation of the function? • incomplete---Algebra - DrBob222, Thursday, July 3, 2014 at 10:41pm • Algebra - Emma, Thursday, Ju...
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Homework Help Posted by Andrew on Wednesday, May 15, 2013 at 11:07pm. Suppose x and y are real numbers and 4x+3xi+yi−43=2y+2xi−x+2yi+5i . What is the product xy . • Algebra - Steve, Thursday, May 16, 2013 at 12:17am (4x-43) + (3x+y)i = (2y-x) + (2x+2y+5)i so, for the two complex numbers above to be equal,...
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Physics Of Hitting A Baseball The Physics Of Hitting A Baseball Hitting the "sweet spot" is something that baseball players strive for. This is the location of the bat that is generally regarded as the best spot for hitting the ball. It minimizes vibration of the bat and results in the maximum energy delivered to the ...
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niche computing science The AoPA(Algebra of Programming in Agda) library allows one to derive programs in a style resembling that in the book Algebra of Programming in Agda. For example, the following is a derivation of insertion sort: sort-der : ∃ ([ Val ] -> [ Val ]) (\f -> ordered? ○ permute ⊒ fun f ) sort-...
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a few questions I need help with. thank you August 17th 2007, 03:45 AM jessicamelia1983 a few questions I need help with. thank you Okay I am almost done with this lesson. Once again I need help. UGH.. I already did this but received an F and I am fixing all the wrong answers. Please show me how you got the...
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Miller-Rabin Primality Test A Fast Primality Test in JavaScript: the Miller-Rabin Primality Test The Miller-Rabin primality test is among the fastest and most widely used primality tests in computational practice. The algorithm of the test is as follows: Given a large odd integer n to be tested, compute one or more...
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the encyclopedic entry of continuity equation A continuity equation is a differential equation that describes the conservative transport of some kind of quantity. Since mass , energy , momentum , and other natural quantities are conserved, a vast variety of physics may be described with continuity equations. ...
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Homework Help Posted by Sergio on Monday, April 23, 2012 at 1:07am. Determine whether the triangle has no/one/two solutions. Then Find and round measures of sides to the nearest tenth and measures of the angles to the nearest degree. A= 50 degrees, a=34, b=40 • Math - Henry, Tuesday, April 24, 2012 at 8:16pm ...
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Subgroups and Normal Subgroups April 18th 2012, 08:37 AM #1 Junior Member Joined Jan 2010 Posts 29 Subgroups and Normal Subgroups Suppose that $A$ and $B$ are subgroups of a group $G$ with $A\subseteq B$ . Prove that $[G:B]$ divides $[G:A]$ Let N be a normal subgroup of a group G and let H be a subg...
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Indefinite Integral June 12th 2009, 10:42 PM #1 Super Member Joined Jan 2009 Posts 715 Indefinite Integral a) solve $\int \frac{\sin{2x}}{ \sin^4{x} + \cos^4{x} } ~dx$ by substituting i) $u = \tan^2{x}$ ii) $u = \cos{2x}$ b) Can we deduce that $\tan^{-1}({\cos{2x}}) = - \tan...
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Geometry Pattern Formula September 3rd 2008, 02:17 PM #1 Junior Member Joined Aug 2008 Posts 27 Geometry Pattern Formula Hello All, thank you for your help. I am at a complete loss in this problem: Attatched are the triangular numbers used to do the problem, and a table clarifying a few things....
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How to Calculate Resultant Velocity | The Classroom | Synonym Physics can be a challenging course for anyone because it combines science with math and introduces potentially difficult concepts. One basic concept is the concept of speed and how it changes. Calculating the speed of an object can be a simple process if a ...
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No Real Solutions November 8th 2011, 09:26 AM #1 Junior Member Joined Apr 2011 From United States Posts 32 Hey, I came upon a problem where I cannot understand why ${x^2} + 6$ has no real solutions for the polynomial equation $f(x) = - 3({x^2} + 6){({x^2} + 4)^2}$ . Any help is greatly appreciate...
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Speed Distance!! Author Message TAGS: 00:00 B C ...
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Can anyone show me how to complete the square on this It would be $(x-4)^2-2+(y+1)^2+13$. Which is wrong. Solutions manual says it's supposed to be $(x-4)^2-16+(y+1)^2-1$ so would it be what i had = 0 or = -14. I am so confused. Start with your initial equation, then whatever you add to complete the square on the x t...
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Uniform convergence vs pointwise convergence April 23rd 2011, 11:34 PM #1 Newbie Joined Jan 2011 Posts 18 Uniform convergence vs pointwise convergence Hi guys, Can someone please explain to me the advantages of uniform convergence over pointwise convergence? I was told that pointwise convergence doe...
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find all possible values Let $a,b,c,d$ positive real numbers such that $a+b+c+d=12$ , and $abcd =27+ab+ac+ad+bc+bd+cd$ find all possible values of $a,b,c,d$ Solution: Given a+b+c+d=12 and abcd=27+ab+ac+ad+bc+bd+cd then a,b,c and d =? let a=b=c=d=3 then 3+3+3+3=12 LHS => abcd=3*3*3*3=81 RHS=> 27+3*3+3*3+3*3+3*3+3*3+3*3...
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Example 1 We illustrate the straightforward solution of a DDE by computing and plotting the solution of Example 3 of [23]. The equations are to be solved on [0,5] with history y[1](t) = 1,y[2](t) = 1, y[3](t) = 1 for t £ 0. A typical invocation of dde23 has the form sol = dde23(ddefile,lags,history,tspan); The ...
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1966 QST Article [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. A Passive Limiter By George Schleicher.* W9NLT Fig. 1 - The basic limiter circuit. Closing...
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tion Show that $C(8,4)=C(7,3)+C(7,4)$ Let's manipulate the left side to become the right side $\frac{8!}{4!\cdot (8-4)!}=\frac{8!}{4!\cdot 4!}=\frac{8\cdot 7!}{4!\cdot 4\cdot 3!}=\frac{2\cdot 7!}{4!\cdot 3!}=\frac{7!}{4!\cdot 3!}+\frac{7!}{4!\cdot 3!}$ $\frac{7!}{3!\cdot (7-3)!}+\frac{7!}{4!\cdot (7-4)!}=\boxed{C(7,3)+...
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Inverting matrix with unknown. September 6th 2009, 09:11 PM #1 Member Joined Sep 2007 Posts 81 Inverting matrix with unknown. Hi all, Quick question. I'm just unsure of how to handle an unknown in a matrix when talking about finding the inverse. Usually I simply augment (A|I) and reduce it...
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Solving Linear Systems by Graphing Definition of a Linear System Real-world applications are often modeled using more than one variable and more than one equation. A system of equationsA set of two or more equations with the same variables. consists of a set of two or more equations with the same variables. In this se...
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Pesquisa Operacional Serviços Personalizados Artigo Indicadores Links relacionados Compartilhar versão impressa ISSN 0101-7438 Pesqui. Oper. v.26 n.3 Rio de Janeiro set./dez. 2006 http://dx.doi.org/10.1590/S0101-74382006000300002  Lagrangean relaxation bounds for point-feature cartographic label placement probl...
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Sum or Difference Formulas January 4th 2012, 10:27 PM Nickod777 Sum or Difference Formulas This is not for homework, nor for a teacher to see, just a test correction so that I know what to do, or what I am doing wrong. Use the sum or Difference formulas to find the exact value of each expression. 1. si...
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Generating Functions February 12th 2010, 03:10 PM #1 Newbie Joined Nov 2009 Posts 20 Generating Functions Hi can someone please help me with the following please: Find the generating functions for the following sequences, express them in a closed form, without infinite sums: (i) 1,2,1,4,1,8,1,1...
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Find E(X) April 7th 2009, 11:56 AM #1 Banned Joined Jan 2009 Posts 58 Find E(X) In a state lottery a three digit integer is selected at random. A player bets $1 on a particular number and if that number is selected, the payoff is $500 minus the $1 paid for the ticket. Let X equal the payoff to the be...
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deleted neighborhood of limit L July 23rd 2011, 08:59 PM #1 Junior Member Joined Jun 2011 From Colorado, United States Posts 56 deleted neighborhood of limit L The question is this true or false. Justify. Let f:[a,b]-> $\Re$ and let c $\in$ (a,b). If lim_{x->c} f(x)=L and L>0, then there is a de...
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Proof of Convergence of a Series June 30th 2010, 02:45 PM ragnar Proof of Convergence of a Series I'm trying to prove that, if $|z| > 1$ for any complex $z$, then $\displaystyle \sum^{\infty}_{n = 1} \frac{1}{1 + z^{n}}$ converges. I got this far but no farther: If we try by comparison test, $|\frac{1}{1 + ...
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Related Rates, urgent February 27th 2007, 05:58 AM #1 estabaaqui Guest Related Rates, urgent I did some of the work but didn't have time to put it up here. I'm really confused...can someone help me. A baseball diamond has the shape of a square with sides 90 feet long. A player hits the ball and runs toward f...
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Differential Geometry exam confusion! December 9th 2007, 04:28 AM #1 Newbie Joined Nov 2007 Posts 23 Differential Geometry exam confusion! Right, I need to show that a(t)=(cost,sint,0)is not a geodesic of the plane. But I'm not sure what I'm supposed to actually do! Right I've been thinking abou...
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Fraction Equations With Powers October 24th 2008, 06:38 PM #1 Newbie Joined Oct 2008 Posts 9 Hey, I hate to ask this much of someone to help but im in a real bad spot right now and my college exam is coming up monday and when handed a review to study, my mind went completely blank on half the review s...
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Area of Combined Shapes Area of combined shape is nothing but more than one shape is combined together we can find the area of the combined shapes.  Here we are going to see some example problems for finding the area of the combine shapes. Normally area is nothing but the space occupied by the 2 dimensional shape. The ...
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Differential Equations July 26th 2007, 10:08 AM #1 Differential Equations A water trough, 6 metres long, has uniform cross section in the shape of a semicircle with horizontal diameter 2 metres. It contains water to a depth of x metres. THe centre of the circle is at O and the triangle POQ is isosceles with a...
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Range of 3d function? Khan I'm not sure how to approach this problem: Find the range of f(x,y) = Ax^2 + 2Bxy + Cy^2 (Answer will be in terms of A, B, and C) Thanks! And we haven't yet been allowed to use partial derivatives, so they can't be used to solve it. First investigate the cases when one or more coefficient...
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Induction Proof again :( November 20th 2007, 04:45 PM #1 Newbie Joined Oct 2007 Posts 4 Induction Proof again :( Hi all, Once again I'm pretty stumped at this one. 3^3 = 27 3^4 = 81 3^5 =243 3^6 = 729 3^7 = 2187 Now these are the same practically. An even second to last ...
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real hard problem April 16th 2009, 12:12 PM #1 Junior Member Joined Feb 2009 Posts 40 real hard problem Suppose that $lim_{x\rightarrow a}$$f(x)$ exist and is positive. Show that for any positive integer n we have $<br /> \lim_{x\rightarrow a} \sqrt[n]{f(x)} = \sqrt[n]{\lim_{x\rightarrow a} {f(x)}}<b...
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Interest Rate and Equity Swaps - CFA Level 1 | Investopedia CFA Level 1 Derivatives - Interest Rate and Equity Swaps Plain Vanilla Interest Rate Swap In general, an interest rate swap is an agreement to exchange rate cash flows from interest-bearing instruments at specified payment dates. Each party's payment obligat...
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Sum and Difference FormulasAlgebraLAB: Lessons Introduction: In this lesson, formulas involving the sum and difference of two angles will be defined and applied to the fundamental trig functions. The Lesson: For two angles a and b, we have the following relationships: Sum formulas: i. sin(a + b) = sin(a)co...
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Obtain an expression Given that $\sum^{n}_{r=1}r^2=\frac{1}{6}n(n+1)(2n+1)$ , obtain an expression , in its simplest term , for $<br /> \sum^{2n}_{r=n+1}(2r-1)^2<br />$ Thanks . $<br /> \begin{gathered}<br /> \sum\limits_{r = n + 1}^{2n} {\left( {2r - 1} \right)^2 } = \sum\limits_{r = 1}^n {\left( {2(r + n) - 1} \righ...
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surface integral February 26th 2013, 12:38 PM #1 Newbie Joined Aug 2012 From Croatia Posts 23 surface integral Find surface area given when rotating $y=(x+5)^{\frac{1}{2}}$ and $5^{\frac{1}{2}} \leqslant x \leqslant 3$ around y asis. How do i do this? Any help Re: surface integral Where did...
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real analysis March 1st 2009, 07:43 AM yuan.69 real analysis 1. If ∑an with an >0 is convergent, then is ∑an² always convergent? Either prove it or give a counterexample? 2. If ∑an with an >0 is convergent, then is ∑(anan+1)^(1/2) always convergent? Either prove it or give a counterexample? 3. Show that ...
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Extremely Simple Circle Probability Problem! :) December 15th 2009, 07:06 PM #1 Newbie Joined Nov 2009 Posts 13 Extremely Simple Circle Problem! :) How many ways can 8 boys be arranged in a circle if 3 boys cannot sit next to each other? Well, I don't actually have the correct answer, but this is ho...
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Lie Algebra-Roots and Dynkin basis December 29th 2010, 06:44 AM #1 Junior Member Joined Jun 2007 Posts 43 Lie Algebra-Roots and Dynkin basis Given a Lie algebra I understand all the stuff about the Cartan-Weyl basis, the roots and stuff, so for example, for A2, the roots are $\alpha=(1,0), \ \ \beta...
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Homework Help Posted by Lizzie on Monday, May 7, 2012 at 2:16am. In a financial deal, you are promised $800 the first day and each day after that you will receive 45% of the previous day's amount. When one day's amount drops below $1, you stop getting paid from that day on. What day is the first day you would receive ...
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Internet Encyclopedia of Philosophy Rudolf Carnap: Modal Logic The Journal of Symbolic Logic in 1946 and the book Meaning and Necessity in 1947, Rudolf Carnap developed a modal predicate logic containing a necessity operator N, whose semantics depends on the claim that, where α is a formula of the language, Nα represe...
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Combination/ Permutation Question May 18th 2010, 10:39 PM #1 Newbie Joined Jan 2010 Posts 22 Combination/ Permutation Question I have a few questions i don't understand T_T 1. A committe of 4 people is to be chosen form a group of 8 people- 4 women and 4 men. How many ways can the committee be chose...
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Homework Help Posted by Sam on Wednesday, January 12, 2011 at 10:27pm. 1.In a jar, suppose there are 3 blue marbles, 2 yellow marbles and one red marble. c. Suppose that 3 marbles are drawn from the jar without replacement. What is the probability that the 3 marbles are all different colors? d. Suppose that 4 marble...
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Exponential Functions Posted by Jus on Tuesday, May 19, 2009 at 7:51pm. Show that if log_b (a) = c, and log_y (b) = c, then log_a (y)=c^-2 • Exponential Functions - Reiny, Tuesday, May 19, 2009 at 8:31pm recall log[b] a = log a/log b (base 10, or any other base for that matter) so log[b](a) = loga/lo...
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Probability using permutation and combination September 10th 2012, 10:15 PM #1 Newbie Joined Sep 2012 From Mauritius Posts 13 Probability using permutation and combination Question : Four-figure numbers are to be formed from the digits 4,5,6,7,8,9 .How many different four-figure numbers can be formed...
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Polar Equations Given the polar equation r=4/(2+2sin(x)).Find the Directrix,eccentricity and sketch the conic. Hello, Gracy! You're expected to know the general form for polar conics. . . $r \:=\:\frac{ke}{1 + e\sin\theta}\qquad\text{or}\qquad r\:=\:\frac{ke}{1 + e\cos\theta}$ . where $e$ = eccentricity And these rule...
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Points in the plane. I want to find some arbitrary point in the plane $2x+4y-2z + 10 =0$ Thank you. Hello, MatteNoob! I want to find some arbitrary point in the plane: . $2x+4y-2z + 10 \:=\:0$ The easiest points are the intercepts. .You can "eyeball" the answers! . . $\begin{array}{cccccccc} \text {Let }y = 0,\:z = 0\...
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Simulation to Implementation as Good Practices for Teaching Power Electronics to Undergraduate Students: Fuzzy Sliding Mode Control for DC Motors Advances in Power Electronics Volume 2014 (2014), Article ID 697263, 9 pages http://dx.doi.org/10.1155/2014/697263 Research Article Simulation to Implementation as Good Pra...
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Sum The Series September 14th 2007, 09:43 PM #1 Newbie Joined Sep 2007 Posts 11 How would I solve this?: Sum The Series- 1 x 2 + 2 x 3 + 3 x 4 + . . . + 1994 x 1995 Thanx $\displaystyle\sum_{k=1}^{1994}k(k+1)=\sum_{k=1}^{1 994}(k^2+k)=\sum_{k=1}^{1994}k^2+\sum_{k=1}^{1994} k$ Now u...
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Huffman Encoding Bases: sage.structure.sage_object.SageObject This class implements the basic functionalities of Huffman codes. It can build a Huffman code from a given string, or from the information of a dictionary associating to each key (the elements of the alphabet) a weight (most of the time, a prob...
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Homework Help Posted by Marcia on Friday, April 27, 2012 at 2:32pm. A bug is placed on the road. t seconds after it is put down, the function is p(t) = -16tsquared + 64t, where p(t) is measure in feet. At what moment will the bug be 14 feet from where it began? • Algebra 2 - visoth, Friday, April 27, 2012 at 3:59pm...
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Hermitian Matrix November 9th 2012, 09:57 AM sfspitfire23 Hermitian Matrix Let M be an nxn complex orthogonal matrix. Show that for any two column vectors v, w in C, show that v * w = (Mv) * (Mw) where * denotes the dot product. I'm stuck. I know that any vector v^H = v^-1 Thanks November 9t...
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Sequence and series April 8th 2009, 01:19 AM #1 Junior Member Joined Mar 2009 Posts 52 Sequence and series Q- Find the sum of the series - 1+1/3+1/6+1/10+1/15+........... what should be our approach to solve these kind of questions ? Thanks, Ashish Hi $S = \frac{1}{1} + \frac...
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Homework Help Posted by TO: Mathmate on Monday, April 23, 2012 at 10:52pm. This is a substitution equation. Would that change the steps that you did? Y=3x+1 Y=5x-3 Answer says x=-2 and y=7 Please explain steps. Thanks math help - MathMate, Monday, April 23, 2012 at 10:25pm Y=3x+1 ...(1) Y=5x-3 ...(2) By compar...
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Proving matrix addition theorem September 19th 2009, 03:37 PM #1 Newbie Joined Sep 2009 Posts 7 Proving matrix addition theorem Hi, I'm in first year university and I'm new to proofs, so I was wondering if anyone here can help me out. The questions ask to prove: 1) A + (B + C) = (A + B) + c ...
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Greens Theorem Attachment 27490 How would I use Green's Theorem to prove this area integral? It is a known deduction of Green's Theorem that, for an area of a disc in a plane, $\displaystyle A = \frac{1}{2}\oint_D xdy-ydx$ Find an expression of x and y in terms of $r=f(\theta)$. and substitute into this equation. The ...
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expansion, binomial May 9th 2009, 09:34 AM #1 Super Member Joined Sep 2008 Posts 607 expansion, binomial In the binomial expansion of $(2k+x)^n$ where k is a constant and n is a positive integer, the coefficient of $x^2$ is equal to the coefficient of $x^3$. (a) Prove that n=6k+2. $(2k+x)^n = 2...
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Homework Help Posted by partha on Friday, September 20, 2013 at 1:21pm. in how many ways can the letters of mahabharat be arranged so that, b and t are never together and m,a,t,h occurs at first four places • maths - Steve, Friday, September 20, 2013 at 1:38pm There are 4! ways to arrange m,a,t,h in the 1st 4 ...
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Study on Driving Stability of Tank Trucks Based on Equivalent Trammel Pendulum for Liquid Sloshing Discrete Dynamics in Nature and Society Volume 2013 (2013), Article ID 659873, 15 pages http://dx.doi.org/10.1155/2013/659873 Research Article Study on Driving Stability of Tank Trucks Based on Equivalent Trammel Pendul...
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Probability with random-coefficient quadratic equation August 14th 2009, 04:43 AM #1 Newbie Joined Apr 2009 From Many Posts 17 Probability with random-coefficient quadratic equation Let A, B, and C be independent random variables, and consider the random-coefficient quadratic equation $Ax^2 + Bx + C ...
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Indefinite Integral March 10th 2010, 11:10 PM #1 Junior Member Joined May 2008 From California Posts 36 Indefinite Integral Just bummed on this question here.. : ∫(pi/ax+b)dx Thanks so much! Step by step teaching if possible.. Thank you so much. I want to learn! Dear gearshifter, ...
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Contaduría y administración Servicios Personalizados Artículo Indicadores Links relacionados Compartir versión impresa ISSN 0186-1042 Contad. Adm  no.229 México sep./dic. 2009   Artículos de investigación Anticipating turbulent periods in Latin...
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Please solve the equation for "Y"? (a few more problems!) September 18th 2010, 10:24 PM ADH Please solve the equation for "Y"? (a few more problems!) Hello, I wasn't completly sure on the ones I have solved. Most of these I have already solved, and have included the answer I got! Please tell me if I ...
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Quadratic Functions exam paper question November 11th 2008, 07:26 AM #1 Member Joined Oct 2008 Posts 157 Quadratic Functions exam paper question Given that the equation kx^2 - 4x + k - 3 = 0 has equal roots, find the value of "k". I know that a=k, b=-4, and c=k-3. Then to put it into ...
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does this converge? Sumation from 1 to infinity of [3^n + 4] / 2^n converges or diverges? Given $\sum\limits_{n=1}^\infty \frac{3^n+4}{2^n}$, I guess you can apply direct comparison test here. Let $b_n=\frac{3^n+4}{2^n}$, consider another sequence $a_n=\frac{3^n}{2^n}$. We have $0\le a_n\ le b_n,\;\;\forall n$. Since ...
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complex numbers January 28th 2009, 10:15 AM #1 Junior Member Joined Oct 2008 Posts 29 complex numbers Express in the form a + bi, where a and b are real (a) sin(3pi/2 - i) (b) cosh(1 + i) have tried using addition formula on (a) but its not right. Note that for $z\in\mathbb{C}$, $\sin...
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Strong Convergence of a Modified Extragradient Method to the Minimum-Norm Solution of Variational Inequalities Abstract and Applied Analysis Volume 2012 (2012), Article ID 817436, 9 pages http://dx.doi.org/10.1155/2012/817436 Research Article Strong Convergence of a Modified Extragradient Method to the Minimum-Norm...
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Calculus ll - Improper Integrals Posted by Alyssa on Saturday, October 2, 2010 at 9:32pm. Find the area of the curve y = 1/(x^3) from x = 1 to x = t and evaluate it for t = 10, 100, and 1000. Then find the the total area under this curve for x ≥ 1. I'm not sure how to do the last part of question ("find the the total...
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Homework Help Posted by Aria on Wednesday, August 31, 2011 at 4:04am. Could someone verify if I got two answers to two problems right? f(x)=x^2-9x+15 find x and y intercepts -9+square root of 21/2,0 -9-square root of 21/2,0 x^2-x+3=0 solve and find x-intercepts (1+square root of -11/2,0) (-1-square root of -11/2...
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Commutators December 11th 2008, 11:11 PM csuiter Commutators What's up I am working on some quantum chemistry problems and I am somewhat confused about commutators. The question asks to calculate the commutators, the questions are: [x,d/dx] [sqrt,()^2] There is also one concerning nuclear spin...
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Physical Fitness Probability April 18th 2009, 10:08 AM #1 Newbie Joined Apr 2009 Posts 14 Physical Fitness Probability I need help please.... A physical fitness association is including the mile run in its secondary-school fitness test. The time for this event for boys in secondary school is known t...
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Kaplan's Infinite Series for Kaplan discovered that d can be written as a series in the form where each a[n] is rational. The first few terms of this series are: Although there is no obvious pattern to these terms, they can be calculated from the Taylor series of the inverse of a certain function. Let f (...
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the encyclopedic entry of neighbor In bioinformatics , neighbor-joining is a bottom-up clustering method used for the construction of phylogenetic trees . Usually used for trees based on DNA or protein sequence data, the algorithm requires knowledge of the distance between each pair of taxa (e.g. species or s...
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Counting Principles April 2nd 2008, 02:46 PM strgrl Counting Principles A homework question: Twelve children are divided up into three groups, of five, four, and three. In how many ways can this be done if the order within each group is not important? I'm not quite sure how to attack this question. ...
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Math Help November 27th 2008, 05:19 PM #1 Newbie Joined Nov 2008 Posts 2 basis let S = { v1 , v2} T = { w1, w2} be bases for R2 Given: V1 = ( 1, -2) V2= ( 3, 0) Transition matrix from T to S be [ 1 2 ] [-1 0] Find w1 and w2. Please help me with the steps. I am not sure where...
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How to solve this problem algebraically? November 30th 2011, 01:12 PM peekayem How to solve this problem algebraically? Qs: One number is 6 more than another. Their product is 520. Find the numbers. -- Let the numbers be: x, x+6 So, x(x+6) = 520 or, x^2+6x=520 then what..? The numbers are 2...
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Decreasing function October 29th 2008, 02:42 PM #1 Junior Member Joined Feb 2008 Posts 48 Decreasing function $f(x)=x^\frac{1}{n} - (x-1)^\frac{1}{n}$ I need help showing this is decreasing for $x$> $1$ Any suggestions? trying to do this with the derivative. I get $f'(x)=\frac{x^\frac...
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This problem looks intimidating at first, but actually is Author Message TAGS: This problem looks intimidating at first, but actually is [#permalink] 11 Nov 2005, 06:15 ...
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Pre-Algebra Placement Test problem November 5th 2010, 11:54 AM Aravsion Pre-Algebra Placement Test problem I'm preparing for college and I got stuck on one of the problems of Pre-Algebra Placement Test.. So can someone please help me find the solution to it. A total of 50 juniors and seniors were given a ma...
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Econometrics: MR, Revenue, profit. September 1st 2009, 04:42 PM #1 The cost (in 000's) of producing x thousands of loudspeaker systems is TC = x^3 + 3x^2 - 10x + 2. Price (p) and quantity demanded (x) which are both required to be non-negative are related by p = 130 - 2x. Marginal Cost (MC) = 3x^2 + 6x - 10. ...
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Verification problems October 21st 2009, 04:22 PM #1 Newbie Joined Nov 2007 Posts 12 Verification problems 1. sinx+cosx/tan^2x-1 = cos^2x/sinx-cosx I've tried everything(converting to sines and cosines, factoring, etc.) and even my teacher couldn't figure it out... 2. 1+tanx/1-tanx = sec^2x+2ta...
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Reference Sphere Positioning Measurement Based on Line-Structured Light Vision Sensor Advances in Mechanical Engineering Volume 2013 (2013), Article ID 587904, 6 pages http://dx.doi.org/10.1155/2013/587904 Research Article Reference Sphere Positioning Measurement Based on Line-Structured Light Vision Sensor State Ke...
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Electronic Journal of Biotechnology Services on Demand Article Indicators Related links On-line version ISSN 0717-3458 Electron. J. Biotechnol. vol.9 no.4 Valparaíso July 2006   Biotechnology Industry Process Biotechnology Electronic Journal of Biotechnology ISSN: 0717-3458 Vol...
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Boolean Laws, and Theorem December 5th 2013, 02:27 PM Jarod_C Boolean Laws, and Theorem What's up wonder community of math wizards. I was hoping you could check a problem for me. For every step I need to pick which numbered law from the list was used. HERE IS THE LIST. Given = $\overline{(A\overline{BC}+\ov...
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Coordinates, vectors and cross products October 15th 2010, 07:30 AM yellowFattyBEan Coordinates, vectors and cross products Hi I have 4 3D points and I have been told I need to create 2 vecors out of them. I then need to cross product these vecotrs to then get another vector. Now with my terrible grasp...
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