Show that the propositional expression

| August 30, 2017

(1)Show that the propositional expression (P^Q)v~(P>Q) does not depend on the propositional variable of Q. (You can simplify using propositional calculus)

(2)Let x and y be two integers. Prove that x^2+xy+y^2 is divisible by 9 if and only if x and y are divisible by 3. (Mathematical Induction methods may be used)

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