Hi,

We're on induction right now. Can somebody help me?

Prove that for all integers n, 3^(3n+1) + 2^(n+1) is a multiple of 5.

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- March 12th 2008, 12:07 PMpizzaRusher1234induction
Hi,

We're on induction right now. Can somebody help me?

Prove that for all integers n, 3^(3n+1) + 2^(n+1) is a multiple of 5. - March 12th 2008, 12:37 PMwingless

= Remainder of

We'll prove that for all integers.

Firstly, try it for an integer, for example ..

It satisfies.

Now we can use induction.

So if f(n) is divisible, f(n+1) is divisible too.

Note: This doesn't work for all n integers. It works for