Answer
See the picture below
Work Step by Step
If r is true, ~r is false and vice versa.
An implication is false only if the first statement is true, and the second one is false.
A conjunction is true only if both of the statements are true.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 3 - Logic - 3.4 Truth Tables for the Conditional and the Biconditional - Exercise Set 3.4 - Page 159: 14
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