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

Homework Help: Indefinite Integral of e raised to a negative fraction

  1. Oct 27, 2008 #1
    1. The problem statement, all variables and given/known data
    Find the constant, c, that satisfies the following equation:


    2. Relevant equations
    The integral is from -infinity to infinity

    1 = c [tex]\int[/tex] e ^ -|x|/2 *dx

    3. The attempt at a solution

    c = 1/4

    I have the solution given to me, but I do not understand how to get the steps to the answer.
     
  2. jcsd
  3. Oct 27, 2008 #2

    Dick

    User Avatar
    Science Advisor
    Homework Helper

    Find the integral of e^(-|x|/2) from 0 to infinity (where you can drop the absolute value). Compare that with the integral of the same function from -infinity to 0.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook