33. (Continued)
Either Boolean product results in a 1 output. The sum-output
column MINTERM EXPRESSION becomes AB+AB by
combining the two Boolean products using the OR operation.
Derive a minterm expression for the 1 output in the CARRY-
output column of the truth table below.
INPUTS
OUTPUT
A
B
SUM
CARRY
0
0
0
0
0
1
1
0
1
0
1
0
1
1
0
1
34. Complete the truth table below.
a.
X
Y
X+Y
X(X+Y)
X(X+Y) =X
0
0
0
0
0
1
1
0
1
0
1
1
1
1
1
1
b. Is the expression X(X+Y) =X equivalent in all cases?
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IT 0346
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