- #1
kathrynag
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Homework Statement
A positive integer a is called a square if a=n^2 for some n in Z. Show that the integer a>1 is a square iff every exponent in its prime factorization is even.
Homework Equations
The Attempt at a Solution
Well, I know a=p1^a1p2^a2...pn^a^n is the definition of prime factorization.
We let p=2n because any even number squared is an even numbers.
Not sure how to continue.