If `r^[th]` and `(r+1)^[th]` term in the expansion of `(p+q)^n` are equal, then `[(n+1)q]/[r(p+q)]` is

If r^(th) (r+1)^(th) terms in the expansion of (p+q)^(n) are equal ,then ((n+1)q)/(r(p+q)) is

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

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

If the coefficient of pth term in the expansion of (1+x)^n is p and the coefficient of (p+1)th term is q then n=

If the coefficient of p^(th) term in the expansion of (1+x)^(n) is p and the coefficient of (p+1)^(th) term is q then n=

If ,p,q,a,b are 6th,7th,8th and 9th term of the expansion of (x+r)^n ,then show that (q^2-ap)/(a^2-bq)=(4p)/(3a)

If p^th term of an AP is 'q' and q^th term is 'p', where p ne q find r^th term.