Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Cylindrical shells trouble integrating

  1. Sep 15, 2004 #1
    i'm told to use the method of cylindrical shells to find the volume gnerated by rotating the region bounded these curves about the y axis:
    Couple questions. What does the graph of y=e^(-x^2) look like? Also, i know the integral is =integral(a,b) 2(pi)x*e^(-x^2) how do i evaulate the e^(-x^2) part?
  2. jcsd
  3. Sep 15, 2004 #2


    User Avatar
    Science Advisor

    The graph of e-x^2 is the famous "Bell shaped curve"!

    As far as the integral of x e-x^2 is concerned, try the substitution u= -x^2.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook