The coefficient of the (r-1)th, rth and (r+1)th terms in the expansion of `(x + 1)^n` are in the ratio 1:3:5. Find both n and r

The coefficients of the (r-1)^(th),r^(th) and (r+1)^(th) terms in the expansion of (x+1)^n are in the ratio 1:3:5 .Find n and r.

The coefficients of (r-1)^(th),rh and (r+1)^(th) terms in the expansion of (x+1)^(n) are in the ratio 1:3:5 Find n and r.

If the coefficients of (r-5) thand (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 .

The coefficient of 5th, 6th and 7th terms in the expansion of (1+x)^n are in A.P. Find the value of n.

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

if the coefficient of (2r+1) th term and (r+2) th term in the expansion of (1+x)^(43) are equal then r=?