Two questions for y'all; both involve determining convergence or divergence, if convergence finding limit:

1) a(sub n) = SQRT((n+1)/(9n+1)): I see that you can make that (N+1)^1/2 divided by (9n + 1)^1/2, but can't progress.

2) a(sub n) = ((-1)^n*n^3)/(n^3+2n^2+1): Since there is the -1^n term, is this simply divergent? Or am I looking at it the wrong way?

Cheers!