# Math Help - calculus convergent series

1. ## calculus convergent series

plz help

2. 2nd One]

n^2/sqrt(n^4+1) >= n^2/sqrt(n^4+3n^4) = n^2/2n^2=1/2

So how can the term a_n converge to zero, if infinitely many terms are above 1/2?

Thus, it diverges by the divergence theorem.