1. ## integral ... hard?

Calculate $\int_0^x \dfrac{(\lambda t)^{n-1}exp(-\lambda t)}{(n-1)!}dt$

2. You can't, unless $x\to\infty.$

I didn't answer your question in FMAT since I thought that it was a typo.

3. Originally Posted by jorgeston
Calculate $\int_0^x \dfrac{(\lambda t)^{n-1}exp(-\lambda t)}{(n-1)!}dt$
Following from what special K said, I've had reason to consider very similar. Read the attachment.

, and $x=30$ specifically
, and $x=30$ specifically