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QUESTION 10 & 11 DISCRETE MATHEMATICS. HELP 10. Prove that if n is a positive integer, then n is odd if and only if 5n+6

QUESTION 10 & 11 DISCRETE MATHEMATICS. HELP

10. Prove that if n is a positive integer, then n is odd if and only if 5n+6 is odd. [10 marks] 11. Use rules of inference to show that the premises (pq)r,r,q led to conclucion p

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