If the sum of the coefficients in the expansion of $(a+b)^n$ is 4096 , then the greatest coefficient in the…

If the sum of the coefficients in the expansion of $(a+b)^n$ is 4096 , then the greatest coefficient in the expansion is
  1. 1594
  2. 792
  3. 924
  4. 2924

Solution

We have $2^n=4096=2^{12} \Rightarrow n=12$; So middle term $=t_7 ; t_7=t_{6+1}={ }^{12} C_6=\frac{12 !}{6 ! 6 !}=924$

Asked in: JEE Main 2002

Practice more Binomial Theorem questions on Aicharya