# Math Help - Improper integral

1. ## Improper integral

\int t^{2/3} \exp^{-a t} dt, where a > 0

2. What do you have to do ? I guess we have to compute $\displaystyle\int_0^{+\infty}t^{\frac 23}\exp (-at) dt$. You can put $x=at$ and you will get a result with Gamma function.