(Comparison Test) If 0 ( f(x) ( g(x) on [a, (), it can be shown that the convergence of

Implies the convergence of

And the divergence of

Implies the divergence of

Use this to show that

Converges. On [1, (), 1/[x4(1 + x4)] ( 1/x4?

g(a) dx f(x) dx, f(x) dx, f(x) dx, a1+x)