If the co-efficients of three cosecutive terms in the expansion of are 220, 495 and 792 respectively, find the value of n
10
11
12
14
As we learnt in
Properties of Binomial Theorem -
-
Let coeffecient be
On solving n=12
Option 1)
10
Incorrect
Option 2)
11
Incorrect
Option 3)
12
Correct
Option 4)
14
Incorrect