Which of the following statements is a tautology? A. (p V ~ q) → (q ^ ~ r) B. - [r → (q A r)] C. q →- (p A r) D. (р^ф) — (qлр) Ов O D

Q: -48 6

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A: formula:

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A: Write the first ,third and fifth term of the expansion of (3x-5y)5.

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A: Given

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A: 500P3 is a permutation term that gives the number of ways of arranging different combinations of…

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A: