Question: Determine if each equivalence is valid or invalid. If valid justify, if invalid list a counter example. a) x(P(x) Q(x)) xP(x) xQ(x) b) x(P(x) Q(x))

Determine if each equivalence is valid or invalid. If valid justify, if invalid list a counter example.

a) x(P(x) Q(x)) xP(x) xQ(x)

b) x(P(x) Q(x)) xP(x) xQ(x)

c) x(P(x) <----> Q(x)) xP(x) <----> xQ(x)

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