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2. Prove (wherev is the first variable that does not occur in P(u)): (a) E3!uP(u) + Ju Vv(u=v=P(v)) (b) EJ!uP(u) Ju(P(u) A Vv(P(v) u=v)) 2.
2. Prove (wherev is the first variable that does not occur in P(u)): (a) E3!uP(u) + Ju Vv(u=v=P(v)) (b) EJ!uP(u) Ju(P(u) A Vv(P(v) u=v)) 2. Prove (wherev is the first variable that does not occur in P(u)): (a) E3!uP(u) + Ju Vv(u=v=P(v)) (b) EJ!uP(u) Ju(P(u) A Vv(P(v) u=v))
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