Prove the following statement with contrapositive proof: Suppose a is an integer. If a^2 is not divisible by 4, then a is odd.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter1: Fundamental Concepts Of Algebra
Section1.1: Real Numbers
Problem 26E
Question

 Prove the following statement with contrapositive proof:

Suppose a is an integer. If a^2 is not divisible by 4, then a is odd.

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