If ^nCr=84 ,^n C(r-1)=36 ,a n d^n C(r+1...

If ` ^nC_r=84 ,^n C_(r-1)=36 ,a n d^n C_(r+1)=126 ,` then find the value of `ndot`

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If ^n C_r=84 , and ^n C_(r-1)=36 , and r = 1 , then find the value of ndot

If ""^n C_(r-1) = 36, ""^(n) C_(r) = 84 and ""^(n) C_(r+1) = 126 then find the value of r.

If ""^(n)C_(r -1) = 36, ""^(n)C_(r) = 84 " and " ""^(n)C_(r +1) = 126 , then find the value of ""^(r)C_(2) .

If ^n P_r=^n P_(r+1)a n d^n C_r=^n C_(r-1,) then the value of n+r is.

If n P_r=^n P_(r+1) and n C_r=^n C_(r-1,) then the value of (n+r) is.

If .^(n)C_(r-1)=36, .^(n)C_(r)=84 and .^(n)C_(r+1)=126 , find n and r.

If .^(n+1)C_(r+1):^(n)C_(r):^(n-1)C_(r-1)=11:6:3 , find the values of n and r.

If .^(n)C_(r-1): .^(n)C_(r): .^(n)C_(r+1)=3:4:5 , find the values of n and r.

If .^(n+1)C_(r+1.): ^nC_r: ^(n-1)C_(r-1)=11:6:3 find the values of n and r.

If n is a positive integer and C_r = ""^nC_r then find the value of sum_(x = 1)^n r^2 ((C_r)/(C_(r - 1)) )

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