36. AB+AB

38. Minterm expressions which have been derived from a truth

table may not always be in the simplest form. If the minterm

expressions are plotted on a Veitch diagram, a simplified

expression may be extracted. The SUM and the CARRY

output minterm expressions are plotted on the Veitch

diagrams below.

A

A

B

X

X

SUM=ABK+ABK+ABK+ABK

B

X

X

K

K

K

A

A

B

X

X

X

37

CARRY=ABK+ABK+ABK+ABK

B

X

K

K

K

Investigation reveals the expression extracted from the SUM

Veitch diagram is exactly the same as the expression is in

the simplest form.

Extract the simplified expression from the Veitch diagram of

the CARRY function.

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