Sorry for all of these induction promblems, i have a couple of more questions, and as an respected remember recommended, i will attempt these promblems.

=============================

Define the sequence F as follows:

Prove that

Here is what i did

1. P(n):

2. P(3) Im confused on this step, i got

3. Assume: P(n):

4. Prove P(n+1)

// replaces right hand side of the original equation up to teh summation of the left hand side

// Factored out . Im stucked, i need pointers on step 2 and 4, thanks.