hello,

I see now that i did these power series by pattern and now I'm stuck big time

Problem is ...

so i found R as

and than i sow x is at power -2n and here is my problem...

should I do it like this : (to see region of convergence)

or like this ...

or I am way of with this ?

can someone please explain to me what to do when i have "x" like i do here

thanks in advance