[Math] Give tight asymptotic bounds for the following recurrence. T(n) = 3T(n/3)+log n

algorithmsrecursive algorithms

Give tight asymptotic bounds for the following recurrence. Justify your answers by
working out the details or by appealing to a case of the master theorem

$$T(n) = 3T\left(\frac n3\right)+\log(n)$$

I choose master's theorem to solve this recurrence

$a=3$, $b=3$ , $f(n)=\log(n)$ —> stuck here

how can handle this recurrence to solve it by master theorem or is there other way to solve it without master theorem

Best Answer

You have that (among other things) $\log(n) \in O \left (n^{0.5} \right )$. Since $0.5<\log_b(a)=\log_3(3)=1$, the first case of the master theorem tells you that $T(n) \in \Theta(n)$.