# Math Help - [SOLVED] Radius and interval of convergence 4

1. ## [SOLVED] Radius and interval of convergence 4

2. I seem to get something else.

I use the fact that is |a|<1 then |a|^{1/n} --> 0

3. Originally Posted by ThePerfectHacker
I seem to get something else.

I use the fact that is |a|<1 then |a|^{1/n} --> 0
are you sure about that? i think it will go to 1. it would go to 0 if we had n not 1/n

4. Originally Posted by ThePerfectHacker
I use the fact that is |a|<1 then |a|^{1/n} --> 0
That is true only if a=0; otherwise the limit is 1.

5. Yes, I made a mistake.

Now I can fix my homework.