Discrete Mathematics with Applications 4th Edition Chapter 1

Discrete Mathematics with Applications (4th Edition)

Chapter 12.1, Problem 9E

In 7–9, add parentheses to make the order of precedence clear in the given expressions.

9. (x | yz) (yx | (yz) z)

consider the expression:

(x | yz) (yx | (yz) z)

Solution: on z*, * is power not multiplication. therefore,

(x | yz) (yx | (yz) z) = (x|yz*)*(yx|((yz)*z))

z* = z\\{0}

*--->multiply