Discrete Mathematics and Its Applications, Seventh Edition

Published by McGraw-Hill Education
ISBN 10: 0073383090
ISBN 13: 978-0-07338-309-5

Chapter 1 - Section 1.4 - Predicates and Quantifiers - Exercises - Page 53: 11

Answer

a) 1 b) 1 c) 0 d) 0 e) 1 f) 0

Work Step by Step

Our domain is all integers. a) $P(0)$ is the probability that $0=0^2$, so $P(0)=1$ b) $P(1)$ is the probability that $1=1^2$, so $P(1)=1$ c) $P(2)$ is the probability that $2=2^2=4$, so $P(2)=0$ d) $P(-1)$ is the probability $-1=(-1)^2=1$, so $P(-1)=0$. e) $\exists xP(x)$ is satisfied by $x=0$, so this value is 1. f) $\forall xP(x)$ is not true for $x=-1$, so this value is 0.
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