Ashwin Muralidharan IIT Madras
Last Activity: 13 Years ago
Hi Vishal,
Let n = 2k+1, where k is any natural number so that n is always odd.
Now series is S = 13+33+53+.....(2k+1)3 + 3*{22+42+......(2k)2}.
Now sum this, and substitute back for k = (n-1)/2 in the final result.
Regards,
Ashwin (IIT Madras).