In the expansion of , the coefficients of (2r+1)th and (r +2)th terms are equal, find r.

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

In the expansion of 
According to the given question:
So, either 2r = r +1 or 2r + (r+ 1) = 34
Hence, r = 1, 11.

Answered by  | 4th Jun, 2014, 03:23: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.