If the coefficients of rth, `(r+1)t h ,a n d(r+2)t h` terms in the expansion of `(1+x)^(14)` are in A.P., then `r` is/are a. 5 b. 11 c. `10` d. `9`

If the coefficients of rth, (r+ 1)th and (r + 2)th terms in the expansion of (1 + x)^(1//4) are in AP, then r is /are

Q.3If the coefficients of the rth,(r+1)th&(r+2) thterms in the exp ansionof (1+x)^(14) are in AP,find r:

If the coefficients of (r-5) thand (2r-1)th terms in the expansion of (1+x)^(34) are equal, find r.

If the coefficients of (2r +1)th and (4r + 5) th terms is the expansion of (1+x)^(10) are equal then r=?

If the coefficients of the rth,(r+1)th,(r-2)th terms is the expansion of (1+x)^(14) are in A.P,then the largest value of r is.

If the coefficients of (r-5)^(th) and (2r-1)^(th) terms in the expansion of (1+x)^(34) are equal, find r.

Let n be a positive integer . If the cofficients of rth (r +1) th and (r +2)th terms in the expansion of (1 + x)^(n) are in AP, then find the relation between n and r .