18. (Continued)

b. FG+(FG+H)

c. SR+(RT+RS)

d. (ST+Z)(AR)(RA)(Z+TS)

a. LM

19.

b. FG+H

c. SR+RT

d. (ST+Z)(AR)

Step by step

solutions on

LAW OF DOUBLE NEGATION: A = A

page A-2.

The diagram and truth table above represent the law of DOUBLE

NEGATION. Whenever two vincula of equal length extend over the

the DOUBLE NEGATIVE law. For example, A = A; CD = CD; A+B =

A+B; etc.

Simplify the following Boolean expressions, using the DOUBLE

NEGATIVE law.

a. X Y Z

c. (R+S) T

b. AB+X

d. L M T