What is going on here? I understand it somewhat.

Find the interval of convergence and power series representation for the function.

Summation sign goes here - n = 0 to infinity ??? - What is the meaning of the n power over ?

Summation sign goes here - n = 0 to infinity ??? - What is the meaning of n and n + 1 powers here?

Below here makes sense

??

- Interval of convergence