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.

Printable View

- Mar 12th 2008, 01:07 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. - Mar 12th 2008, 01:37 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