Results 1 to 1 of 1

- September 4th 2012, 01:42 PM #1

- Joined
- Sep 2012
- From
- missouri
- Posts
- 3

## need soluion for this..help me as soon as possible

how to prove:

let n=p1^r1.p2^r2.p3^r3...pk^rk where p1,p2,..pk are distinct primes and each ri>=0. prove that n is a perfect square if and only if each ri is even.