Please explain in detail Use semantic tableaux to prove or disprove the following entailment: а: [p → (¬h → c)] ^ (p → ¬h) E p → c b: (p^ q) → r E (p → r) V (q → r)

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Q: 15 15 15 15 15 15 15 13 13 13 10 10 8 10 8 8 3

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Q: 5) F1 = M1.M2,M3.Ms.M7

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Q: O None of these

A: multiplicative inverse of 010 in gf(8)

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