Homework Statement
Prove by incuction that for all positive intergers 1/(n(n+1)=(n/(n+1)
Homework Equations
The Attempt at a Solution
I have proved this is true for n=1. I need to find a way to set the equation for n+1
Homework Statement
Prove by matematical induction that (2^(n+1)+9(13^n)) divides by by 11 for all positive intergers
Homework Equations
The Attempt at a Solution
I really have no idea where to start...