1.

Let n in N which one of the following is true?

Answer»

`47^(n) + 16n-1` is divisible by 4
`2(4^(2n+1))-3^(3n+1)` is divisible by 9
`4^(n) -3n-1` is divisible by 11
`3(5^(2n+1)) + 2^(3n+1)` is divisible by 17

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