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Please solve and explain these for me, need to understand better (b) Use natural deduction rules to prove the validity of the following formulas. 1.

Please solve and explain these for me, need to understand better

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(b) Use natural deduction rules to prove the validity of the following formulas. 1. (AB)C(AB)(AC) 2. x(P(x)Q(x)),x(P(x))x(Q(x)) x1(x2x3),x1x4,x4x5x2x5 x(Q(x)R(x)),x(P(x)Q(x))x(P(x)R(x))

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