#### Question

Consider the following expressions P, Q and R.

P: X = Y⋆Z

Q: Y = X⋆Z

R: X⋆Y⋆Z=1

Which of the following is TRUE?

a.

Only P and Q are valid

b.

Only Q and R are valid

c.

Only P and R are valid

d.

All P, Q, R are valid

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###### Q. Define the connective * for the Boolean variables X and Y as: X * Y = XY + X' Y'. Let Z = X * Y. Consider the following expressions P, Q and R. P: X = Y⋆Z Q: Y = X⋆Z R:...

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