I am doing some old multiple choice tests in order to prepare for an exam. However, I am stuck between solving the magnitudes questions some nice links would be appreciated as well as an answer.
The question: Which of the functions has magnitude equal to $n^2+n^3log(n)$?
I am sure that its not 1) 3) 5) 6).
As their exponents aren't 6 as is the first?. However I am kinda stuck whether to choose 2 and 4. I know the right answer is supposed to be 2).