# Indefinite Integral of e raised to a negative fraction

1. Oct 27, 2008

### MathMan09

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 $$\int$$ 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. Oct 27, 2008

### Dick

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.