If `(n !)/(2!(n-2!))a n d(n !)/(4!(n-4!))` are in the ratio `2:1` , find the value of `ndot`

If (n !)/(2!(n-2)!) and (n !)/(4!(n-4)!) are in the ratio 2:1 , find the value of ndot

If (n!)/( 2!( n-2) !) and (eta !)/( 4!(n-4)!) are in the ratio 2: 1 , find the value of n.

If ((2n)!)/(3!(2n-3)!)a n d(n !)/(2!(n-2)!) are in the ratio 44 :3, find ndot

If \ ^n P_4=360 ,\ find the value of ndot

(i) If (n!)/(2.(n-2)!): (n!)/(4!.(n-4)!) = 2:1 , find the valye of n. (ii) If ((2n)!)/(3!(2n-3)!): (n!)/(2!(n-2)!) = 44:3 , then find the value of n.

If 25^n^(-1)+100=5^(2n)^(-1), find the value of ndot

If P(n ,4)=20xxP(n ,2), then find the value of n

If m,n in N and m=(n^2-n-35)/(n-4) , then find the value of m.

If sum_(n=0)^oo2cot^(-1) ((n^2+n-4)/2)=kpi then find the value of k

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