using Mathematical induction , prove tha...

using Mathematical induction , prove that `3^(2n)+7` is divisible by 8.

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`3^(2n)+7` divisible by 8
put n=1
`3^2+7=16` is divisible by 8
put n=2
`3^4+7=88` is divisible by 8
`3^n+7` is also divisible by 8.

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