Originally Posted by
mathh18 I'm working on proof by induction and am not quite understanding it. It seems simple but its not clicking.
Here are two i'm stuck on:
Prove that for each integer n is greater than or equal to 1, (n^3)-n is divisible by 3
Prove that all integers for n greater than or equal to 2, 2^(3n)-1 is not prime.
for this i'm guessing i would need "Case 1" and "Case 2" for odd and evens?
I'm completely lost and frustrated and the books examples aren't helping. Any tips on either of these proofs would help so much! thanks!!