If in the expansion of `(1+x)^n` the coefficients of 14th, 15th and 16th terms are in A.P. then n=` (A) 12 (B) 23 (C) 27 (D) 34

If the coefficients of 3rd, 4th , 5th terms in (1+x)^(2n) are A.P. then 4n^2 -26n + 40 =

If in the expansion of (1+x)^(15), the coefficients of (2r+3)^(th) a n d\ (r-1)^(th) terms are equal, then the value of r is a. 5 b. 6 c. 4 d. 3

how that the coefficient of (r+1) th in the expansion of (1+x)^(n+1) is equal to the sum of the coefficients of the r th and (r+1) th term in the expansion of (1+x)^n

If the coefficient of 4th term in the expansion of (a+b)^n is 56, then n is

If the coefficient of 4th term in the expansion of (a+b)^n is 56, then n is

Find n if the coefficients of 4th the 13th terms in the expansion of (a+b)^n are equal.

If the coefficients of 2nd, 3rd and 4th terms in the expansion of (1+x)^(2n) are in A.P. then

If the coefficients of 5th, 6th , and 7th terms in the expansion of (1+x)^n are in A.P., then n= a. 7 only b. 14 only c. 7 or 14 d. none of these

If the coefficients of 5th, 6th , and 7th terms in the expansion of (1+x)^n are in A.P., then n= a. 7 only b. 14 only c. 7 or 14 d. none of these

If the coefficients of 5th, 6th , and 7th terms in the expansion of (1+x)^n are in A.P., then n= a. 7 only b. 14 only c. 7 or 14 d. none of these