@DanielFischer Great :)
The exercise asks the following: Give asymptotic upper and lower bounds for $T(n)$. Suppose that $Τ(n)$ is constant for $n \leq 2$. Make your bounds as tight as possible, and justify your answers.
Doing it as above, are our bounds as tight as possible or do we have to prove that $T(n) \in \Theta(n^2)$.