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A few pre calc questions! help appreciated December 13th 2008, 08:28 PM #1 Junior Member Joined Dec 2008 Posts 31 A few pre calc questions! help appreciated f(x) = 3x^2-5 and g(x) = 2/x. find the function of f(g(x)) and give the domain. Solve equation with exact answers: -x^2-3x+10 = 0 f(x) = l...
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Binary Recurrence Sequences. sage: R = BinaryRecurrenceSequence(1,1) #the Fibonacci sequence sage: R(137) #the 137th term of the Fibonacci sequence 19134702400093278081449423917 sage: R(137) == fibonacci(137) True sage: [R(i) % 4 for i in xrange(12)] [0, 1, 1, 2, 3, 1, 0, 1, 1, 2, 3, 1] sage: R.period(4) ...
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-Vector Equilibrium Problems Abstract and Applied Analysis Volume 2014 (2014), Article ID 509404, 4 pages http://dx.doi.org/10.1155/2014/509404 Research Article Optimality Conditions for ε-Vector Equilibrium Problems ^1School of Economics and Business Administration, Chongqing University, Chongqing 400030, China ^2R...
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Homework Help Posted by anonymous on Thursday, October 28, 2010 at 11:02pm. why does ln(1/x)= -1/x ? • Calculus - jai, Thursday, October 28, 2010 at 11:05pm is that the derivative? if it is, ln(1/x) can be written as: ln (x^-1) = -ln(x) since the derivative of ln (x) is 1/x, then derivative of ...
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tes Introduction This page includes simple formula for the calculation of the maximum stress and deflection for thin flat plates under a variety of support and loading conditons. The equations are only valid if the deflection is small compared to the plate thickness. The plates are all assumed to be steel with a poiss...
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analysis of a proof 1. November 20th 2009, 03:26 PM #16 2. November 20th 2009, 04:06 PM #17 I think considering this is the university help section, it is fair to say this proof is not complicated. It just relies on the properties of the real numbers. $x\leq |x|$ follows from the fact that the r...
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Need Help Using Complex Exponentials To Solve Differential Equation October 28th 2007, 08:01 AM #1 Newbie Joined Sep 2007 Posts 3 Need Help Using Complex Exponentials To Solve Differential Equation Hi, Can someone help me with the following? Use complex exponentials to find the solution of the ...
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differential equation problem March 20th 2009, 04:25 AM swimmergirl differential equation problem I almost have the answer but I can't quite get there. Differential equation is dH/dt= (40-H)^2/100 I solved it through here: H= 40 - 200/(2t + 5) However, when I plug in a value t=5 I get the...
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TI-89 zeros, vertex and discriminant? How do I solve zeros, vertex and discriminant? For the quadratic equations. I have a TI-89 Titanium. Y1=(x-4)^2-2 y2=x^2-2x-3 Hello, 1. I assume that you have entered the term at y1 and y2 in the (Y=)-editor. to y1: The equation of this parabola is in vertex form and you can get t...
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Determine Equation For Polynomial Function shown by Graph September 16th 2013, 07:08 AM #1 Junior Member Joined Oct 2011 Posts 62 Thanks 2 Determine an equation in factored form for the polynomial represented by the graph. Graph #1: Image - TinyPic - Free Image Hosting, Photo Sharing & Video Host...
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Proof that sum^infty of 1/n^2 = ... August 7th 2010, 11:34 AM #1 Member Joined Jun 2010 Posts 205 Thanks 1 Proof that sum^infty of 1/n^2 = ... I am trying to prove $\frac{x^{2}}{2} = \pi x - \frac{\pi^{2}}{3} + 2\displaystyle \sum^{\infty}_{n = 1} \frac{cos(nx)}{n^{2}} for 0 \leq x \leq 2 \pi$. I've ...
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Calculus: Chain Rules and Implicit Differentiation May 21st 2007, 03:35 PM #1 Newbie Joined May 2007 Posts 10 Calculus: Chain Rules and Implicit Differentiation I've actually already done the first 2 problems I'm posting, but I'd like to see how someone else works them out because I'm not sure about my w...
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Math Help March 15th 2010, 05:10 AM #1 Connectedness Prove that any infinte set with co-finite topology is connected. Does this question even make sense? Let $(X,T)$ be an infinite space with co-finite topology. Let $(U,V)$ be a two point discrete space where $U=\{0,1\}$. Let $f: X \rightarrow...
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Straight forward ODE February 5th 2011, 03:13 PM VonNemo19 Straight forward ODE Hi again. Here's one. (a) Without solving, explain why the intitial value problem $\frac{dy}{dx}=\sqrt{y},$$y(x_0)=y_0$ has no solution for $y_0<0$. (b) Solve the initial value problem in part (a) for $y_0>0$ and ...
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Help Evaluating Algebraic Problem September 22nd 2010, 06:19 AM #1 Junior Member Joined Sep 2010 Posts 68 Help Evaluating Algebraic Problem Express x in terms of y for the expression: $\frac {x-2y}{3}=\frac{y-2x}{2}$ and hence evaluate: $\frac {7x-2y}{3x+y}$ So i express x in terms of...
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differencial equations May 18th 2007, 12:16 PM #1 Junior Member Joined Mar 2007 Posts 63 differencial equations 1.A fruit fly population of 182 flies is in a closed container. The number of flies grows exponentially, reaching 340 in 18 days. Find the doubling time (time for the population to double) to t...
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Homework Help Posted by Mickey on Friday, March 12, 2010 at 8:58pm. If $1,000.00 is deposited into an account paying 3% interest compounded annually (at the end of each year), how much money is in the account after 5 years? (Round to the nearest cent.) I cannot remeber the formula for this problem can you help • ma...
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If y= log {x + (1 = x^2)^1/2} what is dy/dx? September 28th 2007, 11:46 PM #1 Newbie Joined Sep 2007 Posts 5 If y= log {x + (1 + x^2)^1/2} what is dy/dx? I hope someone can help me with this problem: If y= log {x + (1 + x^2)^1/2} what is dy/dx? apprantly the answer is dy/dx = (1 + x^2)^-1/2 , b...
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Solution of Nonlinear Elliptic Boundary Value Problems and Its Iterative Construction Abstract and Applied Analysis Volume 2012 (2012), Article ID 210325, 14 pages http://dx.doi.org/10.1155/2012/210325 Research Article Solution of Nonlinear Elliptic Boundary Value Problems and Its Iterative Construction ^1School of...
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Showing the closest point in a set to a point outside the set is orthogonal to October 1st 2008, 12:05 PM #1 Newbie Joined Sep 2008 Posts 7 Showing the closest point in a set to a point outside the set is orthogonal to Hi everyone, I have a bit of an algebra/convexity type problem. I've been asked t...
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Derivative With Natural Logs February 17th 2010, 02:46 PM #1 Junior Member Joined Dec 2009 Posts 46 Derivative With Natural Logs $(1+\ln x)^7$ I would have to use the general power rule rather than log properites correct . so the answer should be. $\frac{7}{x} (1 + \ln x)^6$ You must use t...
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Homework Help Posted by Erica on Tuesday, October 18, 2011 at 9:08pm. Use either substitution or integration by parts to evaluate the integral: ∫(x+2)/(x²+2) dx Thank you!! • Calculus - Steve, Wednesday, October 19, 2011 at 5:44am If x = √2 tan t, x^2 = 2tan^2t x^2 + 2 = 2sec^2t dx = √2 sec^2t ...
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Homework Help Posted by Kay on Thursday, June 23, 2011 at 8:25pm. Can you help me with this? I did this many times and got different answers each time. Find f. f ''(x) = 3e^x + 3sin(x) f(0) = 0 f(π) = 0 My work: f ''(x) = 3e^x + 3sin(t) f'(x) = 3e^x - 3cos(t) + C f(x) = 3e^x -3sin(t) + Cx + D 0=f(0)= 3e^0 - 3...
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[SOLVED] Miscellaneous 6 OCR November 26th 2007, 07:55 AM #1 james singh jagjit Guest Hi everyone, I am new in this forum Find the value of k for the following equation which has 2 real roots Kx^2 + kx + 2 = 0 Now I have found that: b^2 -4ac k^2 - 4*k*2> 0 K^2 -8k > 0 I do not understan...
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Common Fixed Point Results for Four Mappings on Partial Metric Spaces Abstract and Applied Analysis Volume 2012 (2012), Article ID 190862, 11 pages http://dx.doi.org/10.1155/2012/190862 Research Article Common Fixed Point Results for Four Mappings on Partial Metric Spaces ^1Faculty of Science and Arts, University of...
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Y' = ay-b*y^2-c*y*x; x'=d*y^2 Hi. I've compared Jacquelin's method against the numerical results although I avoided a value that would give X=0 since we're taking logs below. So I let: [tex]a=1[/tex] [tex]b=1[/tex] [tex]c=2[/tex] [tex]d=1[/tex] [tex]x_0=1[/tex] [tex]y_0=2[/tex] I believe there is a mistake in th...
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MATHS CBSE class 9th Chapter 4 - Linear Equations in two variable MATHS CBSE IX Chapter 4 -Exercise 4 :1 Linear Equations in two - Answer of question on Page 68 Answer Q1. Q2. Question 1: The cost of a notebook is twice the cost of a pen. Write a linear equation in two variables to represent this statement. (Take t...
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help with PDE February 6th 2009, 04:00 PM #1 Member Joined Nov 2006 Posts 142 help with PDE Can someone help me with this, it's slightly different from other separable equation PDE's I've done before: Consider a thin rectangular plate (0 <= x <= pi, 0 <= y <= pi/2) with the following steady-state te...
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Complex integration September 19th 2009, 04:23 AM #1 Complex integration Hey guys, quick question. How would I go about showing that this following equation: $\int_{|z|=3}^{}tan(z).dz$ equals $-4\Pi i$ ...I've tried breaking it down to $sin(z) / cos(z)$, then finding the residues using the singular...
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Cardinality December 7th 2010, 09:00 AM worc3247 Cardinality I'm stuck on this question: Let A={1,2,3....,n}. What is the cardinality of the set: {(a,S) : a $\in$S, S $\in$P(A)}. I feel like its going to be related to 2^n, but i'm not sure. Could someone point me in the right direction? December 7t...
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Producing permutations, part five Last time on FAIC I showed how you could produce the mth permutation of n elements, where m is a number between zero and n!-1 that chooses from the n! possible permutations. There’s a very interesting way to represent numbers that are always less than n! for a given n that I thought I...
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Help setting integral limits for P(X1 <X3 -X2) July 4th 2012, 11:35 PM #1 Member Joined Mar 2008 Posts 93 Thanks 1 Help setting integral limits for P(X1 <X3 -X2) Let (X1 ,X2, X3) be i.i.d. r.v.'s with common probability density function f(x)= e^(-x), 0 <x and 0 otherwise Find P(X1 <X3 -X2) ...
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Basic Electronics and Robotics Training Course: Part 2 Resistances in Parallel When resistors are placed in parallel, they behave differently than they do when they are in series. So, if you have a resistor of a certain value and you place other resistors in parallel with it, the overall resistance will decrease inste...
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Circle in Triangle October 27th 2009, 11:08 AM #1 Member Joined Apr 2009 Posts 190 Circle in Triangle Hi I have attached the question as a word file. I have worked through it, and need help with the last bit. I do not understand how to show the relationship between A and B in ii) he first time ...
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Homework Help Posted by lee on Sunday, November 18, 2012 at 10:19am. what are the real or imaginary solutios of the polynomial equation x^3-8=0 I came up with 1+i sgrt 3 and 1-i sgrt 3 could some see if I'm right • algebra - Bosnian, Sunday, November 18, 2012 at 12:33pm First byou must find real solution. ...
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A Note on Closed-Form Representation of Fibonacci Numbers Using Fibonacci Trees ISRN Discrete Mathematics Volume 2014 (2014), Article ID 132925, 3 pages http://dx.doi.org/10.1155/2014/132925 Research Article A Note on Closed-Form Representation of Fibonacci Numbers Using Fibonacci Trees School of Information Technol...
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Group Homomorphism October 26th 2012, 11:10 PM #1 Junior Member Joined Sep 2012 From Singapore Posts 32 Group Homomorphism Hi anyone knows how to solve this? My answer was 3. Is it correct? Question: If f:S[3]-> Z[2 ]given by f(a) = 1 if a is a 2-cycle f(a) = 0 otherwise is a group h...
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MathGroup Archive: March 2003 [00641] [Date Index] [Thread Index] [Author Index] Re: Need a nice way to do the "left count" • To: mathgroup at smc.vnet.net • Subject: [mg40302] Re: Need a nice way to do the "left count" • From: Selwyn...
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Latin American applied research Servicios Personalizados Articulo Indicadores Links relacionados Bookmark versión impresa ISSN 0327-0793 Lat. Am. appl. res. vol.41 no.1 Bahía Blanca ene. 2011   ...
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el Sort by: Per page: Now showing results 1-10 of 17 This collection of 103 individual sets of math problems derives from images and data generated by NASA remote sensing technology. Whether used as a challenge activity, enrichment activity and/or a formative assessment, the problems allow students to... (View More)...
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Homework Help Posted by Daniel on Thursday, December 4, 2008 at 6:45pm. Find the solution subject to the initial conditions. dP/dt = -2P P(0)=1 dP/-2P = dt then do i take the antiderivative? what would i do next?? • Calculus - drwls, Thursday, December 4, 2008 at 6:51pm Yes. ln P = -2 t + C P = e^(-...
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Trig identities June 5th 2010, 05:19 AM #1 Member Joined Mar 2010 Posts 78 Trig identities 14. a) Which equations are not identities? Justify your answers. b) For those equations that are identities, state any restrictions on the variables. i) $(1 - cos^2x)(1 - tan^2x) = \frac{sin^2x - 2sin^4x}{...
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-Dimensional Sawada-Kotera Equation Abstract and Applied Analysis Volume 2013 (2013), Article ID 767254, 5 pages http://dx.doi.org/10.1155/2013/767254 Research Article The Multisoliton Solutions for the -Dimensional Sawada-Kotera Equation ^1Applied Technology College, Southwest University of Science and Technology, ...
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Practical data mining of vague and uncertain data Databases are developed to store data, but more important is the ability to query the data after it has been stored. Database management systems, such as those based around relational models (that is, Structured Query Language (SQL)-based), document models (such as Mong...
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symmetric transpose matrix November 19th 2009, 06:07 PM ecc5 symmetric transpose matrix I am stuck on this problem. Let A be an arbitrary mxn matrix. Show that A transpose times A is symmetric. My teacher has been doing proofs using i and j to denote entries of the matrix, so if you could use that notation w...
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Perfect Numbers January 24th 2009, 02:31 AM #1 Newbie Joined Jan 2009 From Italy Posts 1 Hi, I'm new here and so I first want to say "Hi, everybody"!! I've got a little problem with Euclid's method to find perfect numbers. The question is, how to prove that any number like p^n, where p is a pr...
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Evaluate the definite integral of the algebraic function December 3rd 2012, 06:51 AM #1 Senior Member Joined Nov 2012 From Hawaii Posts 260 Thanks 2 Evaluate the definite integral of the algebraic function If you integrate the square root of 2/x does it come out to just 2x because when i rewrite ...
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Proof by contradiction. October 5th 2011, 07:52 PM Aquameatwad Proof by contradiction. Someone PLEASE help me! I'm trying to write a contradiction to the statement: If three positive real numbers x,y,z are chose between 0 and 1 with 0<x<y<z<1, then the distance from x to y is less than .5 or the distance...
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Kadomtsev-Petviashvili equation From Scholarpedia Gino Biondini and Dmitry Pelinovsky (2008), Scholarpedia, 3(10):6539. doi:10.4249/scholarpedia.6539 revision #91398 [link to/cite this article] The Kadomtsev-Petviashvili equation (or simply the KP equation) is a nonlinear partial differential equation in two spatia...
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Formula of a summation April 19th 2009, 08:42 PM #1 Junior Member Joined Feb 2009 Posts 57 Formula of a summation Hi all... I am having alot of trouble finding a guide on how to solve this. I have been told that I can compute the first few terms to get the formula but have no idea where to start. Thanks ...
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AIME I Question The number $\sqrt{104\sqrt{6}+468\sqrt{10}+144\sqrt{15}+2006}$ can be written as $a\sqrt{2}+b\sqrt{3}+c\sqrt{5}$, where a,b, and c are positive integers. Find a*b*c. Any hints? Quote: Originally Posted by Jameson $104\sqrt{6}+468\sqrt{10}+144\sqrt{15}+2006=(a\sqrt {2}+b\sqrt{3}+c\sqrt{5})^2$ Open paran...
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Graph theory proof May 6th 2010, 05:27 AM #1 Newbie Joined Oct 2008 Posts 6 Graph theory proof I just received an assignment back and was told that my proof to the following was not valid; I'm not sure why. Would appreciate if someone could point out my errors. Prove that if G is a graph with no cyc...
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Logarithms October 12th 2010, 07:29 AM rtblue Logarithms Hello everyone, I had a question about a problem involving some logs: $5log_32+2log_910=?$ I'm not quite sure where to start with this problem, any suggestions would be appreciated. October 12th 2010, 07:36 AM TheEmptySet Quote: A go...
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ew Quote: Ahh, k so basically an i/o board that is easily integrated with a pc. Most controllers I have seen are PID. Sounds like you've got lots of work ahead hehe (fun project btw). Shouldn't take long at all. I just ordered the McMasterCarr parts, btw. Quote: The step response is probably a good place to begin,...
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On Energy Conditions for Electromagnetic Diffraction by Apertures ISRN Mathematical Physics Volume 2012 (2012), Article ID 983809, 25 pages http://dx.doi.org/10.5402/2012/983809 Research Article On Energy Conditions for Electromagnetic Diffraction by Apertures ^1Beuth Hochschule für Technik Berlin, Fachbereich II-Ma...
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Numbers that are comprised of all 1's in binary expansion July 3rd 2010, 09:01 PM #1 Newbie Joined Jun 2010 Posts 8 Numbers that are comprised of all 1's in binary expansion I have to find a number that is made of 1's only (i.e. 111, 1111, 1111111, not 1010, 11101, 1101010, etc) that is a multiple of 17....
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Coupled difference equations - Change of coordinates problem September 10th 2009, 03:25 AM #1 Coupled difference equations - Change of coordinates problem The setup is: Consider the coupled system of difference equations generated by a Leslie model with $b_{1}=1, b_{2}=4, d_{1}=0.5$ $x_{n+1}=x_{n}+4y_{n...
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questions in physics January 4th 2011, 07:59 AM r-soy questions in physics questions : 1 ) A person notices a mild shock if the current along a path through the thumb and index finger exceeds 78 ľA.? Compare the maximum possible voltage without shock across the thumb and index finger with a dry-skin res...
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Physics: Motion problem No Calculus allowed. I need some help. I'm really stuck... Thank You. no calculus, huh? since $\Delta y = 0$ $0 = v_{yo}t - \frac{1}{2}gt^2$ $0 = t\left(v_{yo} - \frac{1}{2}gt\right)$ $v_{yo} = \frac{1}{2}gt$ $t = \frac{2v_{yo}}{g} = \frac{2v_o\sin{\theta}}{g}$ $\Delta x = v_x \cdot t$ $\Delta ...
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Function homework help September 27th 2012, 01:40 PM #1 Newbie Joined Sep 2012 From Ny Posts 17 Function homework help Let f be the function given by f(x)= 2x/sqrt(x^2 + x + 1) A) find the domain and justify B) write an equation for each horizontal asymptote C) does the graph cross any ho...
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a body is coasting to a stop and the only force acting on it is a resistance March 26th 2010, 04:27 PM #1 Senior Member Joined Apr 2009 Posts 253 a body is coasting to a stop and the only force acting on it is a resistance A body is coasting to a stop and the only force acting on it is a resistance propo...
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equations of lines February 21st 2007, 07:27 AM #1 Newbie Joined Oct 2006 Posts 12 equations of lines Write the slope of a line that is parellel to each line y=2x - 5 3x+y = 10 Write an Equation for the line containing the point (6,-2) Parrell to the line 2x + y = 5 If you rearrange...
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Cauchy's Integral formula for Derivatives February 17th 2011, 12:22 PM #1 Newbie Joined Feb 2011 Posts 2 Cauchy's Integral formula for Derivatives Higuys, I'm having a bit of trouble showing this. Any help is much appreciated $\displaystyle(\frac{1}{2i\pi})\oint_{C} (\frac{e^{tz}}{z^{n+1}}) dz =...
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Bifurcation Analysis in a Delayed Diffusive Leslie-Gower Model Discrete Dynamics in Nature and Society Volume 2013 (2013), Article ID 170501, 11 pages http://dx.doi.org/10.1155/2013/170501 Research Article Bifurcation Analysis in a Delayed Diffusive Leslie-Gower Model College of Mathematics and Information Science, ...
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algebra help Solve for m and n: 2m-n=3 mē - mn+nē =3 Here is one way, by substitution. 2m -n = 3 ------(1) mē -mn +nē = 3 ---------(2) From (1), 2m -3 = n, or, n = 2m -3 Substitute that into (2) m^2 -m(2m -3) +(2m -3)^2 = 3 m^2 -(2m^2 -3m) +(4m^2 -12m +9) = 3 m^2 -2m^2 +3m +4m^2 -12m +9 -3 = 0 Collect like terms, (m^2...
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Homework Help Posted by jack on Tuesday, January 25, 2011 at 11:02am. If line g passes through point (2, 2) and is perpendicular to the line h, then what is the equation of line g? With h passing through two points (1, 2) and (3, 6) • Math - Reiny, Tuesday, January 25, 2011 at 12:09pm slope of line through the...
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Directional Derivatives and Gradient Vectors March 14th 2011, 07:14 AM #1 Junior Member Joined Feb 2011 Posts 26 Directional Derivatives and Gradient Vectors I would appreciate any help on the following problem: Suppose I am descending a mountain, and for every 3 meters I travel NW, I climb 1/2 a me...
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Holomorphic extension of Dirichlet Series April 26th 2010, 02:43 PM #16 Define $L : \{s \in \mathbb{C}| Re(s) > 0\} \rightarrow \mathbb{C}$ by $L(s) = \sum_{n=0}^\infty \frac{(-1)^n}{(2n+1)^s}$. Note that $L(s) = \frac{1}{\Gamma(s)} \int_0^\infty \frac{t^{s-1}}{e^t+e^{-t}}dt$ Show that L can be extended...
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derivative of a function December 2nd 2009, 12:00 PM #1 Newbie Joined Nov 2009 Posts 9 derivative of a function $f(x) = \left\{ {\begin{array}{rl} {0,} & {x \in \mathbb{Q}} \\ {x^2 - x^4 ,} & {x otin \mathbb{Q}} \\ \end{array} } \right.$ I'm trying to find $f'(x)$. I think the function f is not cont...
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Conjecture June 28th 2009, 11:48 AM Bruno J. Conjecture I posted this on another forum a while back but nobody was able to prove or disprove this conjecture of mine. I have empirical reasons to believe that it is true. Let $A \subset \mathbb{N}$ be an infinite subset of the positive integers. Define $f...
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find convergent set of the power series find the convergent set of the power series. heres the equation for problem2: http://img297.imageshack.us/img297/6606/untitledoy2.jpg Use the ratio test, $\frac{n+2}{n+1}\to 1$ Thus, the radius of convergence is the reciprocal of that, namely, 1. Thus, $|x|<1$ Is absolute conver...
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Microbial Growth Chapter 2 Biofilm Growth and Development Section 2 Biofilm Growth and Development Page 2 Microbial Growth Copyright © Alfred B. Cunningham, John E. Lennox, and Rockford J. Ross, Eds. 2001-2010 Microbial Growth As discussed in the blue/green levels of this chapter microbial cells use nutrients for ...
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Intersection of 3 planes September 13th 2009, 07:18 AM #1 Senior Member Joined Nov 2008 Posts 425 Intersection of 3 planes Find the intersection of pi1, pi2, pi3, and describe geometrically in each case. a) pi1: x-y+2z=7 pi2: 2x+y-z=3 pi3: x+y+z=9 b) pi1: x+y-z=3 pi2: 2x-y+z=5 p...
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At what quantity is the total revenue maximised? January 1st 2008, 04:51 AM #1 Newbie Joined Dec 2007 Posts 17 At what quantity is the total revenue maximised? A firm has a demand function P = 32 – Q At what quantity is the total revenue maximised? All i think about this question is to change i...
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Data Reduction in Low Powered Wireless Sensor Networks 1. Introduction A Wireless sensor network (WSN) [1] is a special kind of a peer to peer network where the nodes communicate with the sink wirelessly to transmit the sensed information. In contemporary world, a WSN utilizes different technological advancements in l...
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percent increase over years August 4th 2010, 07:24 AM sfspitfire23 percent increase over years Given ‘y’ is the cost of an article. If the cost of the article increases by ‘x%’ every year from 1945 to 1990, then what is the formula for its cost after 45 years? A. x {1 + (y/100)} ^ 45 B. y {1 + (x/100)} ...
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Trig Function Derivs. February 29th 2008, 08:30 AM #1 Member Joined Nov 2007 Posts 112 Trig Function Derivs. Find the derivative of the function below. Remember to use pi for π. g(x) = sin^2(10x) - pix alright just need to know how to do this problem. could some one show me in steps how to g...
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integral bessel function July 1st 2013, 09:03 AM #1 Newbie Joined Apr 2008 Posts 24 integral bessel function Dear members, I have a problem with the summation for computing this integral.(see attached pdf file) I downloaded it from the intenet. My problem is shown on the pdf file. Tha...
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order t (mod p) March 15th 2009, 08:23 AM #1 Junior Member Joined May 2008 Posts 55 If $a,$ a not equal to 1 has $order t (mod p)$, show that $a^(t-1) + a^(t-2) + .......+1=0 (mod p).$ $a^t \equiv 1 \pmod{p} \Leftrightarrow a^t - 1 \equiv 0 \pmod{p}$ Can you factorise $a^t - 1$? Sim...
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Trigonometric Limit Can anyone help me out with this question; Find the limit (as x approaches 0) of $\frac{1 - \cos2x}{x^2}$. Using the identity $cos(2x) = cos^2(x) - sin^2(x)$ $\lim_{x\to 0} \frac{1-cos(2x)}{x^2}$ $=\lim_{x\to 0} \frac{1-cos^2(x)+sin^2(x)}{x^2}$ $=\lim_{x\to 0} \frac{sin^2(x)+sin^2(x)}{x^2}$ $=2\lim...
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Find a differentiable function with the given properties April 15th 2009, 01:30 PM #1 Junior Member Joined Apr 2009 Posts 29 Find a differentiable function with the given properties hello, need your help find all function $f$ differentiable over $\mathbb{R}$ $- (\forall x\in \mathbb{R}) : \big(f...
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modular arithmetic March 16th 2010, 10:53 PM #1 modular arithmetic How would you go about proving that $(a+b)\,\mbox{mod}\,n = a\,\mbox{mod}\,n + b\,\mbox{mod}\,n?$ We know by the D.A. that $a = nq + a',\, 0 \leq a' < n$ and $b = nq' + b',\,0 \leq b' < n$ These equations imply that $a' = ...
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Reserve Bank of India Indrajit Roy* Abstract: In this paper we use high-frequency multivariate data and attempt to model the joint distribution (dependence structure) of daily exchange rate returns of four major foreign curre...
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If x and y are perfect squares, then which one of the Author Message TAGS: If x and y are perfect squares, then which one of the [#permalink] 05 Jun 2012, 02:48 ...
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maxima minima problem HELP! November 11th 2010, 07:16 PM choward maxima minima problem HELP! the problem is f(x)=(x^3-3x)/(x^2-2) I don't even know how to start I have to find the y and x intercepts first can someone tell me how i do that? Then i tried to find the derivative but i don't think it was righ...
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Math Probability Posted by Antonio on Monday, April 16, 2012 at 2:03pm. If the probability that event A will happen is 1/4 and the probability of A not happening is 3/4, find the probability that event A happens 3 times out of 7 experiments • Math Probability - MathMate, Monday, April 16, 2012 at 3:23pm A bino...
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Create sum expression from algebraic expression December 14th 2011, 07:23 AM silver163 Create sum expression from algebraic expression Hello, I am trying to create a summation equation from this algebra equation, would it be possible? x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x If so can anyone help me? De...
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binomial identities November 7th 2009, 10:08 AM #1 $\binom{2n}{n} = \sum_{r=0}^{n}\binom{n}{r}^{2}$ Can somebody start me on this? I have the identities in front of me, but I just make a mess. No clue. Like what does: $\sum_{r=0}^{n}\binom{n}{r}^{2}$ become? It will help if you think of it this...
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ACT Question - cos and tan October 13th 2009, 07:00 PM #1 Newbie Joined Oct 2009 Posts 5 ACT Question - cos and tan Hello, I am preparing for the ACT and stumbled upon a question that I don't understand. It says, "If tan x and cot x are defined, what is the value of (tan2x)(cot2x)?" (the 2 represent...
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Positive Almost Periodic Solution for a Model of Hematopoiesis with Infinite Time Delays and a Nonlinear Harvesting Term Abstract and Applied Analysis Volume 2013 (2013), Article ID 146729, 6 pages http://dx.doi.org/10.1155/2013/146729 Research Article Positive Almost Periodic Solution for a Model of Hematopoiesis wi...
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-Metric Spaces International Journal of Analysis Volume 2013 (2013), Article ID 917158, 6 pages http://dx.doi.org/10.1155/2013/917158 Research Article Remarks on -Metric Spaces ^1Department of Mathematics, King Saud University, Saudi Arabia ^2Dipartimento di Matematica e Informatica, Università degli Studi di Palerm...
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Math Help September 17th 2007, 08:33 AM #1 Newbie Joined Sep 2007 Posts 8 Please can you explain how do I do the following: 1. logN1 = log(N0 multiplied by 2^n) Make n the subject? All logarithms must be kept to the base 10. Formula: Growth rate (k) k = logN1 - logN0 / tlog2 ...
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Does the independence of P = NP imply existence of arbitrarily good super-polynomial upper bound for SAT? up vote 1 down vote favorite 2 Let me first define what "super-polynomial" means. Definition. We call a function f super-polynomial if for all k, there exists a constant n such that for all x ≥ n, f(x) > x^k. No...
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Trig Problem November 20th 2008, 10:55 PM #1 Senior Member Joined Jul 2008 Posts 347 Trig Problem (a) Explain why AP = 2cosθ. (b) Find a similar expression for BP in terms of θ. (c) Explain why the coordinates of pt P is (cos2θ, sin2θ). (d) Prove that triangle APQ is similar to triang...
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Vectors in the Plane April 25th 2010, 12:34 AM #1 Junior Member Joined Feb 2010 Posts 52 I'm having trouble with the algebra of this word problem. Resultant Force: Find the angle between the forces given the magnitude of their resultant. Force 1 is a vector in the direction of the positive x-axis and...
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Volume Integral October 15th 2011, 08:04 AM #1 Junior Member Joined Mar 2011 Posts 68 Volume Integral Question: The volume V between $z = \frac{5{x}^{2} + 3{y}^{2}}{R}$ And the x, y plane (z = xy?) What is the volume of this region? Thoughts? $\iiint dV = \iiint dx dy dz$ G...
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Learn about Non Arithmetic Sequences Learn about Non-Arithmetic Sequences Now let's learn about non-arithmetic sequences. The problem says for us to identify the pattern in the following sequence and then find the missing terms. The sequence given to us is 45, 46, 43, 44, 41, blank and blank. We have to find the blank ...
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[ -0.034423828125, 0.060791015625, 0.05859375, -0.0849609375, -0.09033203125, 0.020751953125, -0.0087890625, -0.003936767578125, 0.05078125, 0.0023193359375, 0.08642578125, 0.0025482177734375, 0.048095703125, -0.054931640625, -0.005126953125, -0.0179443359375, -0.054443359375, 0.0197...
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A Physical System :particularly hard lol August 8th 2007, 10:13 AM #1 Newbie Joined Aug 2007 Posts 9 A Physical System :particularly hard lol a really hard one here. would appreciate if you could start me off: a physical system is governed by the following: curl E = $-\frac{\partial B}{\partia...
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[ -0.08349609375, 0.04443359375, 0.0576171875, 0.01507568359375, -0.02001953125, 0.02197265625, 0.0272216796875, 0.0164794921875, 0.04541015625, 0.00151824951171875, 0.0245361328125, -0.0712890625, 0.051513671875, 0.0213623046875, 0.0224609375, 0.00152587890625, -0.040771484375, 0.00...
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Finding eigenvectors April 15th 2011, 09:53 AM #1 Junior Member Joined Apr 2011 Posts 30 Finding eigenvectors Just out of my exam there and I it went fine except for one question. Getting the eigenvalues and eigenvectors of 1 0 8 4 3 12 0 0 7 I got eigenvalues of 1,3 and 7. However when...
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[ -0.0303955078125, 0.01904296875, -0.05859375, -0.01153564453125, 0.018310546875, 0.0198974609375, 0.0167236328125, -0.0546875, -0.048583984375, -0.01068115234375, 0.08984375, -0.024658203125, -0.0111083984375, 0.0284423828125, -0.0279541015625, 0.01031494140625, -0.0625, -0.0961914...
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Construct Elliptic Curves as Jacobians An elliptic curve is a genus one curve with a designated point. The Jacobian of a genus-one curve can be defined as the set of line bundles on the curve, and is isomorphic to the original genus-one curve. It is also an elliptic curve with the trivial line bundle as designated poi...
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[ -0.059814453125, -0.00543212890625, -0.033935546875, -0.01708984375, 0.010498046875, -0.053466796875, -0.0091552734375, -0.020751953125, 0.0206298828125, -0.051513671875, 0.07177734375, 0.018798828125, -0.07421875, 0.057373046875, 0.0400390625, 0.01513671875, -0.11279296875, -0.029...
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