1. let the universe be all the positive integers (N). Determine whether the following are true or false: a) (3x) (x + 3 = 5) b) (Vx)(x ≥ 1) c) (3x) (x² = 5 V x ≤ −1) d) (3x) (2x + 3 = 5 A x ≥ 2)

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