Find the value of n if: `(n+1)! =12.(n-1)!`

Find the value of n if: 2n! n! =(n+1)(n-1)(!(2n-1)!

Find the value of n if: (i) (n+2)! = 12n! (ii) (n+2)! = 60(n-1)! (iii) (n+3)! = 2550 (n+1)! (iv) (n-2)! = 132. (n-4)! .

Find the value of n if (n)/(11!) = (1)/(9!) +(1)/(10!) .

If (a^(m))^(n)=a^(m).a^(n) , find the value of : m(n - 1) - (n - 1)

Find the value of n if ""^(n) P_(13) : ""^(n+1) P_(12) =(3)/(4)

find the value of P(n,n-1)

Find n ,if(n+1)! =12xx(n-1)!dot

For a positive integer n , find the value of (1-i)^(n) (1 - 1/i)^(n)

Find the value of n so that (a^(n+1)+b^(n+1))/(a^n+b^n) may be the geometric mean between a and b.

Find the value of n so that (a^(n+1)+b^(n+1))/(a^n+b^n) may be the geometric mean between a and b.