Question 36249
log_2 (cbrt (M^2N)) =
(1/3)*(log_2 (M^2N)) =
(1/3)*(log_2 M^2 + log_2 N) =
(1/3)*(2*log_2 M + log_2 N) =
(2/3)*log_2 M + (1/3)*log_2 N