Convergence of Power Series: Calculating Endpoints and Using Tests

[lha08]

Homework Statement

I'm having a little trouble concerning the part where we have to calculate the endpoints of a known interval of convergence in order to see whether they are convergent or divergent. In this case, is the summation of n=0 to infinity of (-1)^n/10 diverging or converging. Are there any tests to prove that? I'm kinda confused. Thanks

Homework Equations

The Attempt at a Solution

 

[Mark44]

Have you looked at the alternating series test?

 

[lha08]

Have you looked at the alternating series test?

uhh yea, but it just gives bn= 1/10 which doesn;t make sense...i think

 

[Dick]

(-1)^n/10 doesn't converge. Don't be silly. It doesn't even approach 0. Did you mean to post something else?