Question: 3) [8] Prove using mathematical induction: 7 + 11+ 15 + Answer: = +(4n+3) 2n + 5n for all positive integers n 5n-n for

3) [8] Prove using mathematical induction: 7 + 11+ 15 + Answer: = +(4n+3) 2n + 5n for all positive integers n 5n-n for all positive integers n 4) [8] Prove using mathematical induction: (51 - 3) = 2

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