Tan K.

asked • 03/09/21

Let A = p ↔ [q ^ (~ r -> p)].

(a)Construct a truth table for the expression A. Hence determine whether the

expression A is a tautology, contradiction, or contingency.


(b) Obtain the Principal Disjunctive Normal Form (PDNF) and Principal

Conjunctive Normal Form (PCNF) of A. Hence, deduce the PDNF and PCNF

of ~A.

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