Hi,

I know this is an easy problem, but I just can't understand how it is done. What happens when you take a cycle (permutation in disjoint cycle notation) to the power of something. I know that (1 2 3 4)^4 = (1 2 3 4)^28 = id. But in the case of something like (1 3 5 7)^2, or (3 4 5)^2, I don't know what to do.

Thanks you