four squares

47.

To plot the expression RS+RT on an eight-

two squares

square Veitch

diagram, work with only one

one square

term at a time.

Start with the first

term

on the left (RS).

As stated previously, a

two-variable term occupies two squares on an

eight-square Veitch diagram.

To determine

the proper squares, take each variable of the

term (RS) and determine which squares are

common to both variables, as follows:

R = squares 1,2, 5, and 6

S = squares 1, 2, 3, and 4

Squares 1 and 2 are common to both the R plot

and the S plot (they are common to RS).

Therefore, the plot for the term RS Is

squares 1 and 2, as shown below.

To complete the plot of the expression RS+RT,

the second term (RT) must still be plotted.

Plot the second term (RT) in the diagram

above.

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