39.

TEST FRAME

a.

AB+B+AB+BA

b.

XY+XY

c.

A+LA

40.

An expression can be plotted on a Veitch

a.

diagram only after the

expression has been

converted to minterm form and the correct

diagram drawn corresponding to the number of

possible minterms.

For

simplicity, the

b.

variables in each term should be arranged in

alphabetical order.

The conventional way to

label a Veitch diagram for the three

variables A, B, and C is shown below.

c.

Half of the total squares are assigned to

each variable; and half, to the complement of

each variable.

Each variable overlaps every

other variable and overlaps every complement

but its own. A Veitch diagram for three

variables contains ______________ squares.