(a) If m, n are odd integers, then mn is an odd integer. (b) If m, n are integers and mn is even, then m is even or n is even. (c) If z, y are real numbers and x +y is irrational, then z is irrational or y is irrational.

Elements Of Modern Algebra
8th Edition
ISBN:9781285463230
Author:Gilbert, Linda, Jimmie
Publisher:Gilbert, Linda, Jimmie
Chapter7: Real And Complex Numbers
Section7.1: The Field Of Real Numbers
Problem 17E: Prove that if is a nonzero rational number and is irrational, then is irrational.
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5. Prove each of the following statements:..
(a) If m, n are odd integers, then mn is an odd integer.
(b) If m, n are integers and mn is even, then m is even or n is even.
(c) If z, y are real numbers and x +y is irrational, then z is irrational or y is irrational.
Transcribed Image Text:5. Prove each of the following statements:.. (a) If m, n are odd integers, then mn is an odd integer. (b) If m, n are integers and mn is even, then m is even or n is even. (c) If z, y are real numbers and x +y is irrational, then z is irrational or y is irrational.
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