Sum(n=1 to infinity) ((2x+5)^n) / (n(4^n))

Can someone write out the steps to finding the center point for this power series?

The series

∑an (x-c)n has center at x=c

So, how do we massage your series into that form?

2x+5 = 2(x + 5/2)

So, your sum now is just like

2/(n*4^n) (x + 5/2)n

The center is at x = -5/2