# Calculus

- Elementary functions. Calculating limits, derivatives and integrals. Optimization problems
 Meta Thread / Thread Starter Last Post Replies Views Views: 1,984 Announcement: Follow us on social media and spread the word about PF! Jan16-12 Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions... Feb23-13 09:24 AM micromass 1 46,214 S is a portion of a curve with r(u,v) where 0 < u < 2 and 0 < v < 2pi I'm meant to calculate Flux of the vector... Apr26-13 09:19 AM Bipolarity 2 670 I have a question about limits at infinity, particularly, about a limit I have seen in the context of infinite series... Apr21-13 04:43 PM Bacle2 7 1,122 If I want to find \int f(x) dx where x=a+b and a and b are both variables how would I do this in terms of a and b.... Apr21-13 08:05 PM fzero 8 1,263 Ive repeatedly asked people and my teachers how to solve logs by hand, and ive always got the same answer "They used... Apr21-13 08:41 PM cmcraes 4 902 Hi I am struggling trying to see understand the basic propagator integral trick. \int... Apr20-13 05:29 AM pleasehelpmeno 2 715 Is there any rule of thumb for which variable should be integrated first?, i.e. to make the whole process of double... Apr18-13 04:36 PM Simon Bridge 1 475 If I want to find the distance from a point to a plane. E.g. (2,1,-1) to the plane x+y+z=1 I know that distance... Apr20-13 05:23 PM mathman 8 817 so i have a question about calculating the RMS value of a fully rectified clamped sinusoid. Assumptions: The top... Apr20-13 10:18 AM Stephen Tashi 1 632 Hello, I was studying the theorem of smoothness/compactness in Fourier theory and at the very last step of the... Apr25-13 03:20 AM mnb96 5 888 Hi guys, I was solving this problem using backward interpolation ... Apr18-13 06:28 PM mfb 1 664 Hi guys, I am getting to the end of my cal 2 class and we're hitting infinite series, I was just curious what are... Apr21-13 04:13 PM mathsciguy 12 889 When doing a path integral to determine the work done by a particle : ... Apr19-13 08:34 AM HallsofIvy 1 454 Hello, Could anyone please explain me the steps in these pictures. I do not understand the second step. ... Apr21-13 09:37 PM Desii 3 752 The signal length from satellite to the earth station (AC) can be found as 2(H)/ Due to the earth projection ... Apr21-13 10:47 AM Mandelbroth 3 705 This is a copy of the book: http://i38.tinypic.com/20faqnc.jpg I know the derivation part, I just want to see... Apr21-13 03:39 PM yungman 2 503 Could you help me to find the general term of the sequence: ## 1 , \frac{5}{3} , 1 , \frac{15}{17} , 1 ,... Apr21-13 04:34 AM mfb 5 629 Is it posible that the product of two different divergent series be a convergent serie? Apr21-13 03:01 AM chiro 2 470 Hi all, could some one tell me what I am doing wrong in my analysis in the attached file? Its a parabolical flare... Apr26-13 04:35 AM cmmcnamara 6 935 I was sifting through the beginning of my book when i came upon a section based on marginals and differentials. My... Apr28-13 04:50 AM Fredrik 7 1,073 Can someone please show me how the formula \sum^{∞}_{0}\frac{u^{x}}{x!} = e^{u} Is derived? Or link me to an... Apr21-13 06:27 PM CraigH 3 732 Hello. I can't seem to wrap my head around the geometry of the gradient vector in ℝ3 So for F=f(x(t),y(t)),... Apr22-13 02:50 AM DFeng25 8 1,011 Hi! I am trying to solve this triple integral for computing the potential: ... Apr22-13 10:35 AM keyos89 4 622 Back to how income differences is explained in neoclassical theory, one can ask the question why GDP/capita is \$5200... Apr22-13 12:34 PM jbunniii 1 623 1. The following integral identity holds... Apr27-13 01:31 AM jarvisyang 4 919 I'm working on simple game and am working on a leveling system, using a function to get experience needed. I am using... Apr25-13 12:23 AM Brokenhope` 10 754 Hi, I'm doing an online course for Calculus 12 and I have been struggling with Implicit Differentiation, hoping... Apr24-13 06:15 AM playdohh 3 529 Hello Firstly apologies for what seems like an extremely fundamental question, it's been a while since I've done... Apr25-13 05:37 PM haruspex 4 700 Function is context is: $$\int \frac{(sin^22x)}{(4(1+3cos^2(x)))}dx$$ And according to wolframalpha (I wasn't able... Apr24-13 04:54 PM anj16 4 709 I'm trying to understand the concept of a Gradient vector, and it seems I'm having trouble visualizing certain stuff.... Apr26-13 06:50 AM WannabeNewton 3 678 Stokes' Theorem says the curve integral of any surface S simply equals the counter-clockwise circulation around its... Apr25-13 07:51 AM jambaugh 3 795 Hi all, I'm working on a math problem with a known answer - though I can't reproduce the maths. The problem is... Apr26-13 04:48 PM mfb 3 877 Instead of the shell method, can't one find the volume of a sphere by integrating/summing its horizontal areas? Apr26-13 12:24 PM Mark44 1 595 I would like to calculate the integral \int \frac{1}{|\mathbf y|} \nabla \frac{1}{|\mathbf y... May1-13 04:55 AM Jano L. 2 763 When creating a Fourier series for a function f(x), I consider whether the function is odd or even first. Yet, often... Apr27-13 07:03 PM micromass 3 768 I don't understand the calculus behind this thermodynamics concept: S = f(T,P) dS = (∂S/∂T)_P*dT + (∂S/∂P)_T*dP... Apr29-13 03:53 AM DrClaude 4 1,826 When calculating the limit of the function f(x) = (x^2 + 3)/ sqrt(2x^4 + 5) as x→∞, is it correct to square the top... Apr30-13 03:44 AM SherlockOhms 9 727 The natural logarithm can be expressed as lim n(x^(1/n)−1) n->ifinity Can someone please derive... Apr28-13 06:34 PM tiny-tim 3 655 http://sphotos-h.ak.fbcdn.net/hphotos-ak-ash4/485580_10200547582988715_854455727_n.jpg In formula 1 it says F(1) =... Apr29-13 12:35 PM Nikitin 4 806 I've been trying to figure out how to integrate 1/(x+ln(x)) but am not getting anywhere. Mathematica can't do it, and... Apr30-13 09:12 AM pwsnafu 7 673 Suppose that for any solid region D, it is true that \int\int\int_{D}f(x,y,z)dV = \int\int\int_{D}g(x,y,z)dV ... Apr30-13 10:54 AM CompuChip 2 567