a. XYZ
20. When more than two vincula of equal length extend over the same
b. AB+X
variable, term, or expression, the vincula may be removed two at one
c. (R+S) T
time by using the DOUBLE NEGATIVE law. For example, A = A; CD
d. LMT
= CD; X+Y = X+Y; etc.
By using the DOUBLE NEGATIVE law, ____________
vincula may be removed at the same time.
two
21.
Simplify the following Boolean expressions, using the DOUBLE
NEGATIVE law.
a. AB + C
b. B + F + GH
c. (R + S) T + Z
d. AB + BD
a. AB+C
22. Simplify the following expressions, using the laws that have been
b. B+F+GH
covered.
c. (R+S) T+Z
a. C + DG + FD + G + C
d. AB+BD
b. (Q +R + S) +S + (R + Q)
c. (MNP + Q) L + K
d. (WXY + Z) (Z + WXY)
IT 0344
1-14
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