find the coefficient of x52 ??
Do you understand the second solution here http://math.stackexchange.com/questions/305328/finding-coefficient-of-generating-function Its the same problem.
ans is 204
https://gateoverflow.in//85604/generalized-permutation-and-combination( see the note for more clearification )
@sonam,and one more thing,as far as i know,genral term according to binomial formula in (1-x)n = n+r-1C r but here (1-x)n is in denominator..so why have u not taken minus??
please help me :-(