Wednesday, April 12, 2017

summation - Summing r(r+3) using induction

We want to prove the following summation by induction:
nr=1r(r+3)=13n(n+1)(n+5)
The problem is posted for a friend, but others can look at the solution if they want/need.

No comments:

Post a Comment

analysis - Injection, making bijection

I have injection f:AB and I want to get bijection. Can I just resting codomain to f(A)? I know that every function i...