# Thread: Prove By Induction (Sigma Style)

1. ## Prove By Induction (Sigma Style)

$\sum_{i = 1}^n i^3 = \frac{n^2(n+ 1)^2}{4}$?

2. This is such a standard problem; you will find it worked on the web.
Have you done a web search?
It is pointless to recreate the wheel.

3. Can you show your working so far?