If in the expansion of , the sum of th and th terms is zero, then the value of is
Explanation for the correct option.
Find the value of .
In the expansion of the th term is given as .
Now, for the expansion , the fifth term is given as: and the sixth term is given as: .
As the sum of th and th terms is zero, so
So the value of is .
Hence, the correct option is B.