Try to stay focussed on the problem at hand. For one thing, you're trying to determine the convergence when x = 5 and x = 3. When x = 5, the general term in your series is n/(n3
+ 1). Use parentheses!
but ok, soo like .. how do i show the convergence then with 1/n^2[/QUOTE]
I already answered that question...
Your textbook should have some examples where they use comparison. Take a look at them.
Really, you're going to have to step up and show some initiative. This is post #41 on a problem that's not terribly difficult. Instead of continually asking what you should do next, try something and see where it takes you.