Question

If the coefficients of the rth, `(r+1)t h ,(r-2)t h` terms is the expansion of `(1+x)^(14)` are in A.P, then the largest value of `r` is.
A. `n^(2)-n(4r+1)+4r^(2)-2=0`
B. `n^(2)+n(4r+1)+4r^(2)-2=0`
C. `n^(2)+n(4r+1)+4r^(2)+2=0`
D. `n^(2)+n(4r+1)+4r^(2)+2=0`

Answer 1

Correct Answer - A
N/a