# Math Help - Congruences Problem

1. ## Congruences Problem

1) Assume now that p is prime and p > 3. Show that $p^2$ divides the numberator of r, r as defined in 9.

2) Since gcd(4,9) = 1,4 E $Z^x$bottom 9. What is o(4) as an element of $Z ^x$ bottom 9

Thanks.

I try to figure out about it and sometime I argue it.

2. That doesn't make sense. "defined as in 9"?

What is the question exactly?