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I have a question regarding the normal distribution!! November 4th 2012, 04:50 PM theconman12345 I have a question regarding the normal distribution!! Hi, I have a question reagrding the normal distribution. Suppose there are 3 normal distribution equations as follows X1~N(5,9) X2~N(10,16) X...
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Physics Forums - Proving Rotational K.E. Formula? Proving Rotational K.E. Formula? The total kinetic energy (as viewed from one inertial frame) of a free, rigid body is the sum of all the infinitesimal kinetic energies of the components that comprise the body. How do we prove that for a rotating body [tex]E_k=\f...
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Area Increasing January 23rd 2014, 01:05 PM #1 Newbie Joined Jan 2014 From Texas Posts 3 Area Increasing The length of a rectangle is increasing at a rate of 2 ft. per second, while the width is increasing at a rate of 3 ft. per second. When the length is 4 ft. and the width is 6 ft., how fast, in ...
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Explain how 4/15 is equivalent to recurring decimal. As stated in the title - Quote: Explain how 4/15 is equivalent to recurring decimal. Many Thaanks! Hi BabyMilo, Let's do the long division on this thing. Code: 0 . 2 6 6 6 6 ------------------------ 15 | 4 . 0 0 0 0 0 0 ---------- 4 0 3 0 --------- 1 0 0 9 0 -------...
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derivitive of e to the x root Are you asking "How do you find the derivative of $\displaystyle y = \sin{\left(e^{3x}\right)}$"? If so, use the Chain Rule. Let $\displaystyle u = e^{3x}$ so that $\displaystyle y = \sin{u}$. You should know that $\displaystyle \frac{dy}{dx} = \frac{du}{dx}\,\frac{dy}{du}$. Last edited ...
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Math Help September 17th 2012, 05:09 AM #1 Senior Member Joined Sep 2012 From Sweden Posts 250 Thanks 6 need help! ok i dont know how to solve this problem but i got this far and idk what to do next ok here is the question: For which integers are 4x-6 divisible by 14? how far i got ...
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Inverse of a Matrix: Solve for m, n, p m+2n+p=5 3m+4n+p=8 m-6n+2p=4 There are 2 ways taught us to solve for this using matrix. The Inverse method and Row-Echelon method. In row echelon method i got this answer: m=1 n=1/2 p=3 i know the answer is correct because when i substitu...
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Second quantization blechman Not sure what you mean. The state [itex]|\phi(x)\rangle=\hat{\Phi}(x)|0\rangle[/itex], and the wavefunction is [itex]\phi(x)\equiv\langle 0|\phi(x)\rangle[/itex] in my above notation. Does that make sense? This makes no sense to me. Doesn't the operator [itex]\hat{\Phi}(x)[/itex] annihi...
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How to find Mt and N $t^2+4t+3=A(1+t^2)+(Mt+N)2t$ I got that $A=3$ But how do I get $Mt$and $N$ One way is to expand, Expand, $t^2+4t+3=(A+2M)t^2+(2N)t+(A)$ Corresponding parts are equal, $\left\{ \begin{array}{cccc}A&+2M& \,&=1 \\ \,&\,&N&=4\\ A&\,&\,& = 3 \end{array} \right\}$ You can solve the first equation since ...
4
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How do I evaluate the integral of (sin(2t)^2)^(1/2) ? April 26th 2012, 11:39 AM #1 Junior Member Joined Dec 2009 Posts 68 Thanks 1 How do I evaluate the integral of (sin(2t)^2)^(1/2) ? I had to evaluate an integral from 0 to 2pi in which the integrand was sqrt(sin(2x)^2). I figured the square root o...
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Problem to prove "always divisible by" August 26th 2008, 05:58 PM #1 Newbie Joined Dec 2007 Posts 3 Problem to prove "always divisible by" Hi guys! I did not know how to write this out with the math language here so here's a screen shot from word :> Thanks! Hello ! Here is your question in LaTe...
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Integrals please help. April 24th 2006, 03:44 AM #1 Junior Member Joined Apr 2006 Posts 37 Integrals please help. I have maked some mistakes in follow integrals but I can't find them. Who can help? $\int \int \int z \ dxdydz \ = \ \int^2_{0} \int^2_0 \int ^{\sqrt{4-y^{2}}} z \ dz dydx$ $=\i...
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Patente US4896338 - Method and device for the digital synthesis of a clock signal BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for the digital synthesis of a clock signal. It applies to the making of clock signal generators for radio communications and,...
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A New Characteristic Nonconforming Mixed Finite Element Scheme for Convection-Dominated Diffusion Problem Journal of Applied Mathematics Volume 2013 (2013), Article ID 951692, 10 pages http://dx.doi.org/10.1155/2013/951692 Research Article A New Characteristic Nonconforming Mixed Finite Element Scheme for Convection-...
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Quick arc length question July 30th 2008, 05:00 AM #1 Newbie Joined Jul 2008 Posts 11 Quick arc length question Hi all, i wonder if anyone can help me with this question, tried and failed&im wasting too much time on this one! Determine the arc lenth of: $<br /> \begin{gathered}<br /> y = \ln \co...
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Differential calculus problem January 3rd 2009, 10:51 PM #1 Newbie Joined Jan 2009 Posts 5 Differential calculus problem I am studying calculus at home as a hobby. I have 2 books: The Complete Idiot's Guide to Calculus by W. M. Kelley (K), and Calculus Made Easy (1998)by S.P.Thomson and M.Gardner (T). ...
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Simple Differentiation help June 20th 2010, 05:02 PM seanP Simple Differentiation help i need to differentiate these 3 functions. for a, am i supposed to use the quotient rule ? or would it just be 3x^2/1? x by itself is equal to 1 right? and constants are mostly ignored except for special situations...
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Brevet US4350974 - Logarithmic analog-to-digital converter This is a continuation of application Ser. No. 836,158, filed Sept. 23, 1977. FIELD OF THE INVENTION This invention relates to analog-to-digital converters, and more particularly to analog-to-digital converters in which the logarithm of an input signal is com...
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Deriving general cube roots This is what I tried: [tex]f(x)=ax^3+bx^2+cx+d=0[/tex] is the general equation to solve, and intersects the y axis a distance d from the origin. So, consider [tex]f(x-x_0)=g(x)[/tex] where [tex]x_0[/tex] is one solution of [tex]f(x)=0[/tex]. As we have shifted the original function along ...
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Patent US5384810 - Modulo decoder BACKGROUND OF THE INVENTION The present invention relates to decoding techniques used in data communications. In a data communications system in which convolutional coding is used, a data receiver typically applies a "maximum likelihood decoding" procedure to a sequence of received s...
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Question - Relationship Between the Roots of a Cubic Equation and its Coefficients. May 14th 2013, 10:32 AM #1 Newbie Joined Sep 2011 From UK Posts 17 Thanks 7 Question - Relationship Between the Roots of a Cubic Equation and its Coefficients. My problem comes from the Further Pure Maths 2 textbo...
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Drude formula I can't derive it properly even though it should be easy: From Newtons 2nd law: m dv/dt = -eE => v(t) = -meEt + v(0) (the latter will average out when taking average) Now the Drude assumption: An electron will on average travel a time τ before being scattered and starting its motion in the direction o...
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Polar coordinates January 28th 2008, 09:36 PM #1 Member Joined Sep 2007 Posts 198 Polar coordinates Sketch the curve given in polar coordinates by the equation r = 2 + cos Ѳ (a) Find the area of the region enclosed by the curve. (b) Giving answers to 2 decimal places, find the coordinates o...
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How to solve optimization problem of the form MIN Tr[C'ACB] subject to C'C= a.I November 13th 2012, 04:03 AM #1 Newbie Joined Nov 2012 From Belgium Posts 1 How to solve optimization problem of the form MIN Tr[C'ACB] subject to C'C= a.I Hi I have an optimization problem as follows: Determine...
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[SOLVED] trapezoid problem area June 4th 2008, 05:32 PM roxmysox [SOLVED] trapezoid problem area this is a tough problem and i just can't seem to solve it. please help, thank you there is a trapezoid EFZD. top left is E, top right is F, bottom right is Z, and bottom left is D. it is an isosceles trapezoid. ...
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Predator vs. prey - trouble I am having a bit of trouble deciding how to tackle a project in my LDE class. Any advice on how to get started or what to look out for would be greatly appreciated. It's quite lengthy so I'll try to shorten it wherever possible. ----- Address the impact of a generalist predator on a popula...
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find limit by rearrangement or L'Hopital's? April 11th 2008, 08:50 PM framer find limit by rearrangement or L'Hopital's? Hi, 1st post. According to my text book the following limit converges to $e^2$: $\lim_{n\to\infty}(\frac {n + 3}{n + 1})^n<br />$ through rearrangement i can achieve this: ...
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Physics Forums - View Single Post - Tersonian decimal expansion? 1. The problem statement, all variables and given/known data 1/7=? 2. Relevant equations 3. The attempt at a solution Consider $$y=\overline{145827}.0=\dots145827145827145827.0$$, then $$1000000y=\dots 145827145827000000.0$$ and $$-999999y=145827$...
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linear differential operators February 21st 2013, 11:39 AM #1 Newbie Joined Feb 2013 From Prague Posts 3 Exponential input theorem Hello, I am puzzled about this operation (1) with polynomials in a general proof of Exponential input theorem and I don't understand the the concept of a being s-fold zer...
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Why complimentary Function ? September 22nd 2012, 09:26 AM pratique21 Why complimentary Function ? Why do we find Complementary Function for 2nd order differential equations. Why do we consider the homogeneous equation to find it and why is it a part of the solution ? Individually it does not even satisfy th...
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Volume of Cone in R3 May 2nd 2011, 01:15 PM Ant Volume of Cone in R3 I'm trying to compute the area of the Cone (Z = sqrt[ x^2 + y^2] below the plane z = 2. Using cylindricl polars coordinates: phi: [ -pi/2, pi/2] r: [ 0, 2] z: [ r, 2] with the Jacobian being r. I get 4/3 pi which I ...
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Number Theory , an easy proof . August 1st 2010, 06:53 AM #1 Super Member Joined Jan 2009 Posts 715 Number Theory , an easy proof . Let's first recall some Pythagorean Triples : $(3,4,5) ~,~ (5,12,13) ~,~ (8,15,17) ~,~ (9,40,41) ~,~ (11,60,61)$ etc . Can you see a pattern ? In every triple , ...
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Construction of Hamiltonian from Casimir operators [QUOTE=metroplex021;3369556] Symmetries' (section 3.5) they explain that where a system possesses a symmetry, the corresponding Hamiltonian must be 'built up' from the Casimir operators of the corresponding symmetry group. Does anyone know of a reference where this i...
4
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Patent US20020019803 - Methods for determining value at risk CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority to U.S. Provisional Application No. 60/200,742, filed May 1, 2000; U.S. Provisional Application No. 60/200,743, filed May 1, 2000; U.S. Provisional Application No. 60/200,744, fi...
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Investment interest problem October 23rd 2007, 11:03 AM earachefl Investment interest problem "An investment of $1000 earns $177.23 in interest in two years. If the interest is compounded annually, find the annual interest rate. Round to the nearest tenth of a percent.) Using the formula $P = A(1 + i)^2$, I...
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Sigma Algebra is closed under countable increasing unions September 19th 2009, 04:03 PM #1 Super Member Joined Mar 2006 Posts 705 Thanks 2 Sigma Algebra is closed under countable increasing unions Prove that an algebra $\mathbb {A}$ is a $\sigma$-algebra iff $\mathbb {A}$ is closed under countable in...
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Complex variable line integral... September 4th 2009, 12:07 AM #1 Complex variable line integral... My problem is computing the function of real variable $y$... $\delta (y) = \frac{1}{2\pi i} \int_{c-i \infty}^{c+i \infty} \frac{y^{s}}{s} \cdot ds$ (1) ... where $c >0$ is real, i.e. the integral of the ...
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groups homomorphisms February 2nd 2008, 12:50 PM #1 Junior Member Joined Aug 2007 Posts 45 groups homomorphisms hi a little help would be kindly appreciated here guys. any suggestions on how to go about doing these? INFORMATION ----------------------- if K,Q are groups $\varphi : Q \rig...
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Is proof correct? January 13th 2006, 03:15 AM DenMac21 Is proof correct? I have to prove that $a^5-a$ is dividable with 30 for every integer value of $a$. My proof is: $a^5-a=a(a^2-1)(a^2+1)$ and $30 = 2(2^2-1)(2^2+1)$. So if we put $a$ instead of 2 (or 2 instead of a) the proof is proven. I ha...
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Check this proof. February 4th 2006, 02:56 PM #1 Global Moderator Joined Nov 2005 From New York City Posts 10,616 Thanks 9 Check this proof. The author from my book wrote a nasty proof of existence of algebraic closure for any field. It is nasty because for some reason in the first paragr...
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Math Help May 6th 2008, 09:45 AM #1 I'm a newbie so didn't really know where to post this, but I hope someone here can help me!I'm just beginning to study sequences, and I'm getting nowhere with it. Can anyone please help me with these two problems: 1.)Show that the sequence (1/n^k)nEN is convergent if a...
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Air Rocket Launch Equations Flying model rockets is a relatively safe and inexpensive way for students to learn the basics of forces and the response of a vehicle to external forces. A model rocket is subjected to four forces in flight; weight, thrust, and the aerodynamic forces, lift and drag. There are many different...
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Multiple Linear Regression Model Based on Neural Network and Its Application in the MBR Simulation Abstract and Applied Analysis Volume 2012 (2012), Article ID 703153, 18 pages http://dx.doi.org/10.1155/2012/703153 Research Article Multiple Linear Regression Model Based on Neural Network and Its Application in the MB...
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Probibility Distribution April 26th 2006, 09:54 PM Arbitur Probibility Distribution Prob Dist.. new question.... need help with b. got 7.5 for mean and 2.37 for standard deviation.. where i go from here? April 29th 2006, 11:23 AM Ranger SVO A card is drawn from a standard deck and replaced, if thi...
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Method and apparatus for absolute value summation and subtraction - Patent # 5084835 - PatentGenius Method and apparatus for absolute value summation and subtraction 5084835 Method and apparatus for absolute value summation and subtraction Patent ...
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Differential Equations September 29th 2006, 11:18 PM #1 Newbie Joined Sep 2006 Posts 18 Differential Equations There's this problem that's asking me to use Euler's equidimensional equation, which is a second order differential equation. The problem tells me to substitute x = exp(z) to transform the e...
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Reflexive, symmetric, and transitive December 5th 2009, 10:11 AM oldguynewstudent Reflexive, symmetric, and transitive I'm not sure I have these concepts down well enough. The following is a problem from my professor: Let S = {1,2,3,4,5}. On P(S) define the relation $\rho$ as follows: A $\rho$B iff A $\cap$...
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Physics Forums - Small Sample Size needhelp83 Dec5-10 07:25 PM Small Sample Size [tex]\begin{tabular}{lcr} 418 & 421 & 422 & 425& 427 & 431 \tabularnewline 434 & 437 & 439 & 446 & 447 & 448 & 453 \tabularnewline 454 & 463 & 465 \end{tabular}[/tex] 1. Calc the sample mean and sample standard deviation. [tex]\sum...
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Patent US4896281 - Method for heat loss survey CROSS-REFERENCE TO RELATED APPLICATION This is a continuation of application Ser. No. 739,598, filed May 31, 1985 now abandoned. BACKGROUND OF THE DISCLOSURE In many different kinds of structures, heat loss or gain can be a serious problem from the standpoint of utility...
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Integral of Rational Function September 29th 2010, 08:17 AM #1 Junior Member Joined Oct 2009 Posts 57 Integral of Rational Function I got this question on an exam this morning and I didn't know how to answer it. I've been working on it the past hour trying to figure it out. Usually with rational function...
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On Homoclinic Solutions for First-Order Superquadratic Hamiltonian Systems with Spectrum Point Zero Abstract and Applied Analysis Volume 2014 (2014), Article ID 313690, 9 pages http://dx.doi.org/10.1155/2014/313690 Research Article On Homoclinic Solutions for First-Order Superquadratic Hamiltonian Systems with Spectr...
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Patent US3876871 - Self-adapting control element O United States Patent [1 1 [1 11 3,876,871 Sinner Apr. 8, 1975 [54] SELF-ADAPTING CONTROL ELEMENT 3.463.908 8/1969 Connelly 235/l50.l - v Inventor: Edouard n Grenoble, a c 3.795.799 3/l974 Courtrol ..35/l50.l [73] Assignee: gtlicifte Genet-all: degonstructions Primary...
4
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Positive Solutions of a Second-Order Nonlinear Neutral Delay Difference Equation Abstract and Applied Analysis Volume 2012 (2012), Article ID 172939, 30 pages http://dx.doi.org/10.1155/2012/172939 Research Article Positive Solutions of a Second-Order Nonlinear Neutral Delay Difference Equation ^1Department of Mathem...
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Inductive reasoning June 8th 2009, 01:41 AM Såxon Inductive reasoning Sort of lost on how to continue... Prove that the following formula is true for all n using inductive reasoning 3 + 7 + 11 + .... +(4n - 1) = n(2n + 1) n = 1 is true assume k1 is true? (4k - 1) = k(2k + 1) now to prove k + 1 ...
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Important question plzzzzzzz help June 13th 2013, 12:11 PM sscgeek Important question plzzzzzzz help THE SOLUTION OF [X + (X^2-1)^1/2 / X - (X^2-1)^1/2] + [ X - (X^2-1)^1/2 / X + (X^2-1)^1/2 ] = 14 a) +8 b) -6 c) + or- 2 d) + or - 4 June 13th 2013, 12:16 PM MarkFL Re: Important questi...
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Math Help April 16th 2008, 04:17 PM #1 Ingtegral ok so where did I go wrong.. $\int{cos(mx^2)^2dx}$... so I first did this $\int{cos(mx^2)^2dx}=\int{\frac{1+cos(2mx^2)}{2}dx}$...so then I seperated it to get $\int{\bigg[\frac{1}{2}+\frac{cos(2mx^2)}{2}dx\bigg]}$$\Rightarrow{\int{\frac{1}{2}dx}+\int{\...
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Patent US6072997 - Frequency discriminator for a direct conversion receiver FIELD OF THE INVENTION The present invention relates to an improvement in a circuit construction of a frequency discriminator for an FM (frequency modulation) signal receiver by direct conversion. DESCRIPTION OF THE PRIOR ART There are known...
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Patent US5181184 - Apparatus for multiplying real-time 2's complement code in a digital signal processing system and a method for the same BACKGROUND OF THE INVENTION The present invention generally relates to a real-time multiplier (high speed multiplier) for use in a digital signal processing system and, more partic...
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Diagonalizable matrix August 5th 2008, 06:58 PM #1 Junior Member Joined Aug 2008 Posts 44 Diagonalizable matrix A scalar matrix is a square matrix of the form $\lambda\$I for some scalar $\lambda\$ that is, a scalar matrix is a diagonal matrix in which all the entries are equal. a) Prove that if a s...
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I'm stuck, what should I do next? Ah, well if you're using u-substitution it's especially important to specify the unit of integration at the end of your expression. The above confusion is evidence of what can go wrong when this isn't specified. And off the top of my head, I think changing it to sec^2 would be a good i...
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Wave function problem 1. The problem statement, all variables and given/known data The function [itex] \Psi(r) = A(2-{Zr\over a})e^-{Zr\over 2a} [/itex] gives the form of the quantum mechanical wavefunction representing the electron in a hydrogen-like atom of atomic number Z when the electron is in its first allowed ...
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inverse trig I think I can use calculus to solve your problem, since you wrote some threads in calculus sub-forum, which means that you know the derivatives. For your problem: In other words, you want to prove that: $sin^{-1}(x) = \frac{\pi}{2} - cos^{-1}(x)$ Let $f(x)=sin^{-1}(x)$, and $g(x)=\frac{\pi}{2} - cos^{-1}(x...
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Distance between points find the points of (r) that distam 3 units from point A (0,2,1) (r): y=-x+2 z=2x-2 Answer: (2,0,2) and (0,2,-2) $d = \sqrt{(x_{1} - x_{2})^2 +(y_{1} - y_{2})^2 + (z_{1} - z_{2})^2}$ $3 = \sqrt{(x - 0)^2 + ({\color{red}y} - 2)^2 + ({\color{blue}z} - 1)^2}$ $3 = \sqrt{x^2 + ({\color{red}-x + 2} -...
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A Theoretical Investigation of the Relationship between Structural Equation Modeling and Partial Correlation in Functional MRI Effective Connectivity Computational Intelligence and Neuroscience Volume 2009 (2009), Article ID 369341, 9 pages http://dx.doi.org/10.1155/2009/369341 Research Article A Theoretical Investig...
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Math Help To prove this you need to know the principal value of a complex exponential. $z^w=\exp(w\cdot\text{Log}(z))$ Recall that $\text{Log}(i)=\ln(1)+\frac{i\pi}{2}.$ Yes, i have no background about how to prove it so i want to know the proof in details ,if that ok. I think i found the proof ,but i still have one...
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Prove that G acts transitively on normal subgroup orbits on nonempty finite set A November 17th 2011, 08:59 AM #1 Prove that G acts transitively on normal subgroup orbits on nonempty finite set A The Question is let $G$ acts transitively on a nonempty finite set A let H be normal subgroup of G,Let Orbits of ...
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Equilibrium Conditions at a Solid-Solid Interface Journal of Thermodynamics Volume 2011 (2011), Article ID 940385, 9 pages http://dx.doi.org/10.1155/2011/940385 Research Article Equilibrium Conditions at a Solid-Solid Interface Los Alamos National Laboratory, Theoretical Division, MS-B221, Los Alamos, NM 87545, USA ...
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o Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole. Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text...
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Positive Mild Solutions of Periodic Boundary Value Problems for Fractional Evolution Equations Journal of Applied Mathematics Volume 2012 (2012), Article ID 691651, 13 pages http://dx.doi.org/10.1155/2012/691651 Research Article Positive Mild Solutions of Periodic Boundary Value Problems for Fractional Evolution Equa...
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polar coordinated two variable calculus February 22nd 2009, 05:30 AM James0502 polar coordinated two variable calculus Using polar coordinates evaluate int int over D 3(x+y) and D is x^2 + y^2 <=9, x>=0 Ok, I have int (between -pi/2 and pi/2) d theta . int(between 3 and 0) 3r^2(costheta + sintheta...
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Is this function harmonic? October 7th 2009, 03:51 PM #1 Senior Member Joined Jun 2009 Posts 251 Is this function harmonic?[SOLVED] $u=\frac{1}{r}$ and $r=\sqrt{x^2+y^2}$ Calculate the Laplacian L(u) and give your anser in terms of r. Use dr/dx=d/x etc. $\frac{du}{dx}=\frac{du}{dr}=\frac{-1}{r^2}\fr...
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Independent Random Variables November 29th 2010, 06:15 PM #1 Newbie Joined Nov 2010 Posts 9 Independent Random Variables Hi, I can't seem to get the same answer as the back for this question. Can someone show me how to properly do it? Let X and Y be two independent random variables where E(X) =...
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Annihilator operator Woopydalan Hello, I am having trouble when solving non-homogeneous DE's how to find the annihilator to find my particular solution. For example, if you have a DE that equals 24x^2cos(x), how do I find something that will annihilate this? It seems to me no matter how many derivatives you take, ...
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Compute the following summation please(!) Hello, feyomi! $\text{Evaluate: }\;S \;=\;\sum^{\infty}_{n=1} \frac{n^2}{3^n}$ $\begin{array}{cccccccccc}<br /> \text{We have:} & S &=& \dfrac{1}{3} + \dfrac{4}{3^2} + \dfrac{9}{3^3} + \dfrac{16}{3^ 4} + \dfrac{25}{3^5} + \dfrac{36}{3^6} + \hdots \\ \\[-2mm]<br /> \text{Multipl...
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Slant Asymptotes Just like vertical and horizontal asymptotes, slant asymptotes are lines the graph approaches. They are also called oblique asymptotes. A graph has a slant asymptote if the degree of the numerator is bigger than the degree of the denominator (there is no horizontal asymptote). To find slant asymptote...
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Irreducible polynomials April 5th 2006, 08:51 PM suedenation Irreducible polynomials Hi, does anyone know how to do the following questions? In each of the following cases, find all roots of f(x) in F and factor f(x) as the product of irreducible polynomials in F[x]. (a) F=R, f(x) = (x^6)-1 in R[x] ...
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Differential Equations Help February 5th 2009, 11:16 AM jordanrs Differential Equations Help Stuck on the following problem, unsure of how to go around it 1a. For what none values of k does the function $y=sinh (kt)$ satisfy the differential equation $y'' - 25y = 0$ 1b. for those values ...
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Perpendicular vectors October 24th 2009, 06:59 AM dorwei92 Perpendicular vectors 1. Given the points O (0, 0, 0), P (2, 6, −1), Q (1, 1, 1) and R (4, 6, 2), find a vector that is perpendicular to both (a) OP and OQ (b) PQ and QR (c) RP and QR 2. Find an equation of the plane passing through point P and...
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Trig substitution.. Please HELP ! July 29th 2009, 09:21 PM #1 Newbie Joined Jul 2009 Posts 1 Trig substitution.. Please HELP ! I really need some help with these trig substitution problems. Please write the u and du values for each. I'd really really appreciate it ! 1) Integrate [e^x/(e^2x +1)] dx ...
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Establishing Trig Identities April 9th 2010, 08:44 AM #1 Newbie Joined Apr 2010 Posts 2 Establishing Trig Identities Ive been working on this problem for quite some time now and i haven't been able to figure it out. tanU(cscU-sinU)=cosU this is what ive done so far tanU*cscU - tanU*sinU ...
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Logarithem equation please help me with this equation: Find the value of X such that: log2x + log232 = 6logx2 $<br /> \log _2 x + \log _2 32 = 6\log _x 2 \hfill \\$ $\Rightarrow \log _2 \left( {x \times 32} \right) = 6\left( {\frac{{\log 2}}<br /> {{\log x}}} \right) \hfill$ $\Rightarrow \log _2 \left( {32x} \right) =...
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Sum of Two Independent Random Variables (uniform) February 3rd 2011, 06:12 PM oisduda Sum of Two Independent Random Variables (uniform) Suppose X and Y are Uniform(-1, 1) such that X and Y are independent and identically distributed. What is the density of Z = X + Y? Here is what I have done so far (I am ne...
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1.) Net electric field and 2.) Maximum electric field from centre of a ring 1. Problem1 statement, all variables and given/known data In the figure particle 1 of charge q1 = -8.13q and particle 2 of charge q2 = +3.63q are fixed to an x axis. As a multiple of distance L, at what coordinate on the axis is the net electr...
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Relatively Prime May 26th 2009, 08:45 AM #1 Relatively Prime Show that $5n+3$ and $7n+4$ are relatively prime for all $n$. So we can find integers $x$ and $y$ such that $(5n+3)x + (7n+4)y = 1$ for all $n$. But I don't think this would be a very efficient way of doing this because you have to check it for all...
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Calculus 2 limits as x-->0+ August 3rd 2010, 05:22 PM JubJub1991 Calculus 2 limits as x-->0+ My teacher gave me this problem as an honors problem. She said that at one point I will have to use L'Hopitals rule to solve, but I have no idea where to start. 1. Evaluate the limit, if it exists. l i m (x+1)^...
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Finitely generated subgroup implies cyclic November 28th 2008, 07:23 AM tttcomrader Finitely generated subgroup implies cyclic Let $G = \frac { \mathbb {Q} } { \mathbb {Z} }$ under +, so the elements are the equivalence classes $\hat {r} = \{ s \in \mathbb {Q} : s-r \in \mathbb {Z} \}$. Write $r \equiv s \ (mod ...
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There are, in a certain league, 20 teams, and each team face Author Message TAGS: There are, in a certain league, 20 teams, and each team face [#permalink] 06 Jan 2011,...
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Tricky One Here! January 14th 2008, 02:58 PM #1 Newbie Joined Jan 2008 Posts 5 Tricky One Here! Hey guys, (and girls), I'm new here and I was wondering if someone could get me started on this problem: Find y so that (4y+1)+(y+4)+(10-y) form a geometric series. So far, I know the following: ...
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New User - Help questionse misc January 16th 2011, 09:57 AM #1 Newbie Joined Jan 2011 Posts 4 New User - Help questionse misc Hello i am a new user Fosky! Currently starting my 9 out of 13 week program in TPP for university, im now starting to struggle this course mainly due to algebra, as the cours...
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[SOLVED] Some problems (limsup, liminf, ...) March 10th 2009, 09:42 AM #1 [SOLVED] Some problems (limsup, liminf, ...) Hi ^^ Probability again ! So now we're dealing with Borel-Cantelli's lemma, limsup and liminf, and associates... And this is desperating to see how it is difficult to grasp the concept...
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Two Empty Sets Erland . If two empty set were not equal, there would be one element in one of the sets which is not a member of the other set, and this is impossible, since an empty set has no member at all, whether member or not member of another empty set. This is wrong as the followinf argument shows: WE know t...
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Patent US6259729 - Method of and an apparatus for training tap coefficients of an adaptive equalizer BACKGROUND OF THE INVENTION The present invention relates to a method of and an apparatus for training tap coefficients of an adaptive equalizer, and particularly to the method of and the apparatus for optimizing tap c...
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More integration:evaluation June 16th 2008, 08:22 PM #1 Junior Member Joined Apr 2008 Posts 72 More integration:evaluation Just put a yes or no as to my answer =P, c is a constant, sorry about format and squareroots 1) integrate: (x^4-2x^3+5x+1)/(x^4) dx I got: x -5/(2x^3) -3/(x^3) -2 +c 2...
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Mathematical And Physical Papers - Iii 66 ON THE EFFECT OF THE INTERNAL FRICTION OF FLUIDS condition, and therefore steady motion would have been possible. By determining the arbitrary constants, and substituting in % we should have obtained 8 a r , 2 fr\l~*l ' a -5 ---- +r — & - f sm0...
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find the value that satisfies intial conditions August 18th 2009, 11:31 AM #1 Member Joined Jul 2009 Posts 127 find the value that satisfies intial conditions It is easy to check that for any value of c, the function y=ce^–2x+e^–x is solution of equation y+2y=e^–x Find the value of c for...
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You Can Calculate Slope Quickly and Easily with These TipsGradeAmathHelp.comYou Can Calculate Slope Quickly and Easily with These TipsGradeAmathHelp.com How to Calculate Slope Learning how to calculate slope is as easy once you kno...
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Factor Theroem May 24th 2012, 09:54 AM #1 Newbie Joined Apr 2012 From United Kingdom Posts 6 Factor Theroem Use the Factor Theorem to find the real number k such that (z – k) is a factor of z^3 + (-6 + 2j) z ^2 + (12 - 15j) z + (-9+27j) Hence write z^3 + (-6 + 2j) z ^2 + (12 - 15j) z + (-9+27j) a...
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Patent US20070192397 - Cryptosystem Based on a Jacobian of a Curve RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 09/886,147, filed Jun. 20, 2001, which is hereby incorporated by reference herein. U.S. patent application Ser. No. 09/886,147 claims priority to and the benefi...
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Solve each system by graphing...? June 15th 2008, 09:05 PM AlphaRock Solve each system by graphing...? What does it mean when a question asks: "Solve each system by graphing?" Then: A) y > .5x - 2 3x + 4y<6 B) 4x-y <= (less than or equal to) 8 y <= (less than or equal to) 5 x + 3y >6 ...
4
[ -0.0078125, 0.0262451171875, 0.0172119140625, -0.052978515625, -0.01708984375, -0.05078125, -0.02880859375, 0.0074462890625, -0.017578125, 0.05029296875, 0.0172119140625, 0.01007080078125, 0.05224609375, 0.00982666015625, 0.10791015625, 0.130859375, -0.0703125, -0.06494140625, -0...
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Position as a function of position? In asap9993's equation, a dx = v dv, the quantity, a, is not a constant. a = kx, where k=1.8s^‒1 So, upon integrating, asap9993 dropped the 2 in the denominator on both sides. kx·dx = v·dv → kx^2/2 + C/2 = v^2/2 → (1.8s^‒1)x^2 + C = v^2 , which is what asap9993 had.
4
[ -0.020751953125, 0.06982421875, 0.0361328125, -0.0262451171875, -0.0021209716796875, 0.0040283203125, -0.078125, 0.0400390625, 0.05908203125, 0.0751953125, 0.1103515625, -0.0208740234375, -0.0167236328125, 0.056396484375, -0.064453125, -0.05517578125, 0.00384521484375, 0.0568847656...
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