Correct me if i am wrong
Thanks for the answer. I am having a little difficulty in understanding. Please have a look at my answer using Master Theorem.
when you reduce size of subproblem by log in s function why you have not taken log of m^2.
it should be ,P(m)=8P(m/2)+2logm/m
n(1/2+1/4+1/8+1/8....1/2^k) < n(1/2+1/4+1/8+...) = n(0.5/0.5)= n
T(n) <= 8k*n
T(n) = O(n(logn)3)
I hope that you have understood now