1 or n

i need help If n = 1 - 2, what is 1/n + n3?

...is limit as n goes to infinit? y of 1/(n*ln(n)) I mean, the second one is 1/ln(n) I'll ask it differently. Is the limit as n approaches infinity of 1/(n*ln(n)) equal to 0? And is this because if you split it into two ( 1/n and 1/ln(n)) they approach 0, so you can just multiply them?

what test can i use and how do i do it