1. Suppose a E Z. If a² - 2a + 7 is even, then a is odd. 2. If two integers have opposite parity, then their product is even. 3. If alb, then a (bc).

Algebra: Structure And Method, Book 1
(REV)00th Edition
ISBN:9780395977224
Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole
Chapter9: Systems Of Linear Equations
Section9.7: Puzzle Problems
Problem 16OE
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1. Suppose a E Z. If a² - 2a +7 is even, then a is odd.
2. If two integers have opposite parity, then their
product is even.
3. If alb, then a (bc).
Transcribed Image Text:1. Suppose a E Z. If a² - 2a +7 is even, then a is odd. 2. If two integers have opposite parity, then their product is even. 3. If alb, then a (bc).
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