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please do problems 17, 18 & 20 (no 19) Problem 1.17 Construct the truth table of the compound proposition (p ) V (p) Problem 1.18

please do problems 17, 18 & 20 (no 19) image text in transcribed

Problem 1.17 Construct the truth table of the compound proposition (p ) V (p) Problem 1.18 Show that pq = (p V )~ ( pq). Problem 1.19 Show that pV ~ (p19) is a tautology. Problem 1.20 Show that pA (p19) is a contradiction

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