If `C((n-1),r)=(k^2-3)C(n,(r+1)),` then range of `k` is

If (n-1)C_(r)=(k^(2)-3)nC_(r+1), then k belong to

If ""^(n-1)C_r=(k^2-3)""^nC_(r+1) , then kin :

If ^n-1C_r=(k^2-3)^n C_(r+1),then k in

"^(n-1)C_r=(k^2-8)^(n)C_(r+1) then k is

Let (1 + x)^(n) = sum_(r=0)^(n) C_(r) x^(r) and , (C_(1))/(C_(0)) + 2 (C_(2))/(C_(1)) + (C_(3))/(C_(2)) +…+ n (C_(n))/(C_(n-1)) = (1)/(k) n(n+1) , then the value of k, is

Let (1 + x)^(n) = sum_(r=0)^(n) C_(r) x^(r) and , (C_(1))/(C_(0)) + 2 (C_(2))/(C_(1)) + (C_(3))/(C_(2)) +…+ n (C_(n))/(C_(n-1)) = (1)/(k) n(n+1) , then the value of k, is

If n-1C_(r)=(k^(2)-3)^(n)C_(r+1), then (a) (-oo,-2](2,oo)(c)[-sqrt(3),sqrt(3)](d)(sqrt(3),2]

If C_(r) = ""^(n)C_(r) and (C_(0) + C_(1)) (C_(1) + C_(2)) … (C_(n-1) + C_(n)) = k ((n +1)^(n))/(n!) , then the value of k, is