# Calculus

- Elementary functions. Calculating limits, derivatives and integrals. Optimization problems
RSS Search this Forum
 Views: 8,593 Announcement: Two free ways to get Gold Membership! Jan17-12 Meta Thread / Thread Starter Last Post Replies Views 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 39,311 The line integral can be expressed, at least, in this three different ways: \int \vec{f} \cdot \hat{t} ds = \int... T 03:09 PM Bill_K 4 193 Dear all, I was wondering how the radii of curvature can be calculated of a flexible chain (polymer chain). I have... T 11:51 AM micromass 2 83 I'm a bit confused with limits of big-O terms. What should be the answer for following:- 1) limit of O(1/x) as x->0.... Y 10:43 PM Einj 1 163 I have read about this method , and how feynman utilized this method. I like doing integrals for fun, but I can't seem... Y 09:29 PM lurflurf 2 111 What are the real life applications of improper integrals? Why are they on the syllabus of every first course in... Y 03:58 PM pasmith 1 94 In this section, they derive the Sommerfeld formula. In the first step it seems like they have expanded... Y 09:38 AM Bill_K 3 148 How can I demostrate that a solution of d2u/(dθ)^2+u=0 is u=cos(θ-θ0) Thanks Mar8-14 06:18 PM LCKurtz 7 167 Hello, I would like to learn some contour integration and complex analysis at the simplest level possible. My maths... Mar8-14 12:59 PM homeomorphic 3 274 Hey. I was reviewing some trig substitution and I know how to solve the problem but I was curious if you can also... Mar7-14 05:45 PM tiny-tim 1 140 Consider an oblique circular cone of altitude h, base radius R, with apex directly above a point on the base... Mar7-14 08:25 AM Erland 3 141 When I have a function z = f(x, y), i. e., a function of various variables, the differential form of z is: dz =... Mar6-14 06:04 PM Mark44 1 177 I found this matrix in the wiki: https://upload.wikimedia.org/math/0/d/1/0d11bea7769792cf94e0be53c7b011a0.png ... Mar6-14 11:08 AM Mark44 2 141 In wiki there is the follows formula: https://upload.wikimedia.org/math/f/7/6/f76df7ea16919c17fe62cef9eb303fd7.png... Mar5-14 06:21 PM LCKurtz 2 178 Say you are given the equation of a surface f(x,y) and a point (x,y,z) on the surface. How would one find the... Mar5-14 02:45 PM LCKurtz 3 319 A question about an integral encountered in a paper I am reading about Green's Functions of the acoustic wave equation... Mar4-14 12:32 PM gysush 1 196 We know that: \frac{d}{dx}(\vec{f} \cdot \vec{g}) = \frac{d\vec{f}}{dx} \cdot \vec{g} + \vec{f} \cdot... Mar4-14 08:16 AM vanhees71 2 175 Note: physics conventions, \theta is measured from z-axis We have a vector operator \vec{L} = -i \vec{r} \times... Mar4-14 02:59 AM vanhees71 6 360 show that the substitution z = y^-(n-1) transforms the general equation dy/dx + Py = Qy^n, where P and Q are functions... Mar4-14 02:34 AM tony24810 1 166 Hello, I was wondering if one can give meaning to the Fourier transform of the linear function: ... Mar2-14 03:19 PM mathman 3 221 Hello everyone, I have here one important abstract question which makes up some perplexity to... Mar2-14 08:51 AM Chestermiller 5 232 Hello, I'm a bit stuck with a case in which the curl gives a vector that does not transform under rotation. As... Mar2-14 07:32 AM vanhees71 10 484 I understand why a definite integral of the form ^{b}_{a}∫ƒ(x)dx has the differential dx in it. What I don't... Mar1-14 05:48 PM Jow 4 228 Hi, I need this for part of a math project I'm working on. So as most of us know, e^x, when differentiated, is equal... Feb28-14 09:29 PM mathwonk 15 556 Example, if: z=xy y=x then: the partial derivative \frac{\partial z}{\partial x} = y, treating z as a function of... Feb28-14 06:23 AM pasmith 2 282 If for some functional ##I##, ##δI=0## where ##δ## is symbol for variation functional has extremum. For ##δ^2I>0## it... Feb28-14 05:05 AM muzialis 3 265 I was reading the Wikipedia article at http://en.wikipedia.org/wiki/Euler-Lagrange_equation and came across several... Feb28-14 04:59 AM pwsnafu 2 226 All analitic function can be express how: f(x) = \frac{1}{0!} \frac{d^0f}{dx^0}(x_0) (x - x_0)^0 + \frac{1}{1!}... Feb26-14 05:34 PM Jhenrique 2 278 Say we want to differentiate \arcsin x. To do this we put y=\arcsin x. Then x=\sin y \implies \frac{dx}{dy}= \cos y.... Feb26-14 05:09 PM eigenperson 1 217 I was verifying that: http://upload.wikimedia.org/math/0/2/c/02cdb0955d8b54c21acde435bcc14991.png ... Feb25-14 12:48 PM Jhenrique 4 680 Let us write a convolution $$\int_{0}^{t} A(t-\tau) \mathrm{d}x(\tau)$$ as $$A \star \mathrm{d}x$$ I would like... Feb25-14 10:25 AM muzialis 6 342 Every time I try to read Peskin & Schroeder I run into a brick wall on page 15 (section 2.2) when they quickly derive... Feb25-14 08:49 AM muzialis 2 299 What is the Rate of change of area of circle in respect to radius when radius is 3in I know that that dA/dr is equal... Feb25-14 06:04 AM Integral 5 274 I am just learning how to find lengths of curves using calculus. √((dx)2+(dy)2)→∫√(1+(dy)2)dx. My question is how... Feb23-14 02:39 PM mathman 2 272 I remember a teacher speaking that the fubini's theorem is valid under certain conditions. Implying that not is valid... Feb22-14 11:52 PM lurflurf 1 277 I can derivate x(y) wrt y using the derivative of y(x) wrt x, follows the formula:... Feb22-14 08:38 PM Jhenrique 0 273 So, I'm doing a problem where I take arctanh to a limit, and I was wondering if the arctanh function goes to infinity... Feb22-14 04:22 PM mathman 1 255 For example, if you differentiate 6*sqrt(x^5), would you use the chain rule? If not, why? Thank you! Feb22-14 08:56 AM HallsofIvy 2 288 is the upper limit always greater than the lower limit in integration? what should be the limits if we need to... Feb22-14 04:15 AM PhysicoRaj 2 267 Is there a simple way to series expand a function of the form $$\frac{1}{\sum_{n=0}^{\infty} a_n x^n}$$ about... Feb21-14 06:13 PM Simon Bridge 5 419 really hard integrals? ( 1 2 3 ... Last) can someone give me some really hard intergrals to solve? make sure they are in the range of calculus 1-2 (anything... Feb21-14 04:14 PM dumbperson 92 42,903

Display Options for Calculus Mentors
Showing threads 1 to 40 of 12464 Mentors : 2
 Sorted By Thread Title Last Post Time Thread Start Time Number of Replies Number of Views Thread Starter Thread Rating Sort Order Ascending Descending From The Last Day Last 2 Days Last Week Last 10 Days Last 2 Weeks Last Month Last 45 Days Last 2 Months Last 75 Days Last 100 Days Last Year Beginning
 Forum Tools Search this Forum Search this Forum :   Advanced Search