if XY+Z = X(Y+Z), Which of the following must be true?
a) X=0 and z = 0
b) x = 1 and Y = 1
c) Y = 1 and Z = 0
d) X=1 and Y = 0
e) X=1 and Z=0
ans E
a) X=0 and z = 0
b) x = 1 and Y = 1
c) Y = 1 and Z = 0
d) X=1 and Y = 0
e) X=1 and Z=0
ans E
