k$),O(n)+o(n)=(logn)$

$,5n+(n^3)=(n^2).$

m$)$ If $f(n)=O(4n),$ then $2^{f(n)}=O(2^n),$ where $f(n)$ is a positive function.

n$)n=o(0\mathrm{.}01n^{1\mathrm{.}2})$

o$),2lo{g}_{1000}n=o(lo{g}_{2}n)$