Write it as texsudio only the homework 3. Use infinite limits to prove the following equalities: (a) Homework. \( \frac{6 n^{3}+2 n^{2}-4}{\log n+1} \in O\left(n^{3}\right) \) (b) \( \left(2 n^{2}+1\right) 2^{n}+n \log n \in \Theta\left(n^ 1 answer