66.

(Continued)

Extract the simplest expression from each of

the following Veitch diagrams:

a.

b.

a.

ABC

67.

Up to this point, all plotted squares in the

b.

BFM

Veitch diagrams could be

identified

with just one term, such as A, GF, LTD, etc.

It is often necessary to use more than one

term to describe a plot.

In these cases, the

terms must be joined with OR signs.

For

example, expression ABC+ABC+ABC+ABC is

plotted on the Veitch diagram below.

These squares

These squares

represent the

represent the

term AC.

term AB.

To describe the plot above in simplified

form, join the two terms (AC and AB) with an

OR sign.

Expression ABC+ABC+ABC+ABC is

described in simplified form as AC+AB.