How can I find the integral of \\frac{x^3}{e^x - 1} from 0 to infinity?
Sep 22, 2008 · This is an improper integral, because the integrand x 3 / (e x -1) is not defined at the edge of the integration domain, …
Is the Integral of 1/x ln x or log x? - Physics Forums
Mar 20, 2007 · Is the integral of 1/x ln x og log x? Whatever dude. It's a proof given the defn. d/dx e^x=e^x and defining ln to be the …
How to Correctly Calculate the Line Integral Over a Semicircular Path ...
Jul 29, 2008 · Homework Statement Evaluate the line integral, where C is the given curve. integral of xy^4. C is the right half of the …
What is the integral of sin(x^2) dx? - Physics Forums
Feb 28, 2009 · So, since you cannot integrate sin (x 2) in elementary functions, reverse the order of integration, as I suggested.
What does dx mean in indefinite integrals? • Physics Forums
Nov 28, 2004 · but the main problem here is whast the difference between an indefinite integral and a definite integral with dx? I …
How to solve int. (sqrt (x^2-1))dx - Physics Forums
Dec 15, 2005 · integral (x^2-1)^ (1/2)dx just rewrite it like that and I think you will se how to solve it. Remember to divide with the …
Calculating the Integral of (cos x)^2: Possible or Impossible?
Apr 28, 2004 · Do anyone have an idea how to calculate integral of (cos x)^2 ? Or is it even possible? I tried some substitutions …
If integral equals zero, then function equals zero - Physics Forums
Mar 11, 2009 · Intuitively the problem is clear i would guess. SInce f>=0 then what it menas is that from a to b there is no area …
How Can You Calculate the Length of a Sine Wave's Curve?
Jul 18, 2003 · well, you just have to use the arc length formula. for a function f (x), arc length S = [inte] [squ] (1+ [f' (x)] 2 )dx and then …
Converging or diverging 1/ln (n) - Physics Forums
Jan 9, 2010 · Determine if the series n=2 to inf. of 1/ln (n) converges or diverges Ok so first I tried the limit test (the simple one) and …