Question $2$

Select all statements that are true.

For any functions $f,g,$ and $h,$ if $f(n)=(g(n))$ and $g(n)=(h(n)),$ then $f(n)=(h(n)).$

${\displaystyle \underset{i=n}{\overset{2n}{}}}i=(n^2)$

For any functions $f$ and $g,$ if $f(n)=o(g(n)),$ then $f(n)=O(g(n)).$

$3^n=(2^n)$