1. (20 pts) Given n is a positive integer, prove that n is odd if and only if n² + 3 is even. You must use definitions of even (and odd, if needed). Do not use "even plus even is even" or similar rules of thumb.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter1: Variables, Expressions, And Integers
Section1.7: Multiplying And Dividing Integers
Problem 43E
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1. (20 pts) Given n is a positive integer, prove that n is odd if and only if n² + 3 is even.
You must use definitions of even (and odd, if needed). Do not use "even plus even is even" or
similar rules of thumb.
Transcribed Image Text:1. (20 pts) Given n is a positive integer, prove that n is odd if and only if n² + 3 is even. You must use definitions of even (and odd, if needed). Do not use "even plus even is even" or similar rules of thumb.
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