15. Use mathematical induction to prove that 4l >n? for all integers n 23. [6] 16....

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15. Use mathematical induction to prove that 4l >n? for all integers n 23. [6] 16. Prove that for any positive integer k, where k>1, if k is not a prime number then 2*-1 is also not a prime [6] number. 15. Use mathematical induction to prove that 4l >n? for all integers n 23. [6] 16. Prove that for any positive integer k, where k>1, if k is not a prime number then 2*-1 is also not a prime [6] number.

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