If the coefficient of 2nd, 3rd and 4th terms in the expansion of `(1+x)^(2n)` are in A.P. , show that `2n^2-9n+7=0.`

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 second, third and fourth terms in the expansion of (1 + x)^(2n) are in A.P., show that 2n^(2) - 9n + 7=0 .

If the coefficient of second, third and fourth terms in the expansion of (1+x)^(2n) are in A.P. then show that 2n^(2)-9n=-7 .

If the coefficients of 2nd , 3rd and 4th terms of the expansion of (1+x)^(2n) are in A.P. then the value of 2n^2 -9n + 7 is

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

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

Let n be a positive integer. If the coefficients of 2nd, 3rd, 4th terms in the expansion of (1+x)^n are in A.P., then find the value of n .

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

If the coefficient of the rth, (r+1)th and (r+2)th terms in the expansion of (1+x)^(n) are in A.P., prove that n^(2) - n(4r +1) + 4r^(2) - 2=0 .

If the coefficients of 2nd, 3rd and 4th terms in the expansion of (1+x)^n \ , nin NN are in A.P, then n is a. 7 b. 14 c. 2 d. none of these