Prove: For all integers n, if (n + 1)2 is an even number, then n is an odd number. ii. Prove the original statement by contrapositive, not by contradiction!. For this problem, I expect to see the following, at a minimum:

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter1: Fundamentals
Section1.4: Binary Operations
Problem 9E: 9. The definition of an even integer was stated in Section 1.2. Prove or disprove that the set of...
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Prove:

For all integers n, if (n + 1)2 is an even number, then n is an odd number.

ii. Prove the original statement by contrapositive, not by contradiction!. For this problem, I expect to see the following, at a minimum:

  • Use complete sentences throughout your proof.

  • Define any variables you use, and stating which set they come from (e.g. R, Q, Z, N, etc.),

    and explaining your arguments thoroughly using definitions where necessary.

  • Make sure your proof ultimately satisfies the claim you are trying to show.

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