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By Mathematical Induction, prove the fol...

By Mathematical Induction, prove the following:
(i) `(4^(n) + 15n - 1)` is divisible by 9,
(ii) `(12^(n) + 25^(n – 1))` is divisible by 13
(iii) `11^((n + 2)) + 12^((2n + 1)) ` is divisible by 133 for all `ninN`

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