Question: 2. (8 pts) Prove by existence proof: (a) P: x, y Z, x 4 = y 2 . (b) P: x N, y N such

2. (8 pts) Prove by existence proof:

(a) P: x, y Z, x 4 = y 2 .

2. (8 pts) Prove by existence proof: (a) P: x, y Z, (b) P: x N, y N such that, x 4 = y 2 .

2. (8 pts) Prove by existence proof (b) P: V x N, y E N such that, x4-y2

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