In: Advanced Math
Ex 1. Prove by contrapositive the following claims (please, write down the contrapositive for each statement first).
Claim 1: Let n be an integer. If n 2 − 6n + 5 is even, then n is odd.
Claim 2: Let a, b, c be positive real numbers. If ab = c then a ≤ √ c or b ≤ √ c.