Evaluate : `( x^(m + n ) times x^(n + l ) times x^( l + m ) ) / ( x^m times x^n times x^l )`

(x^(m+n)times x^(n+l)times x^(l+m))/((x^(m)times x^(n)times x^(l))^(2))=1

Evaluate : ( m^(-3) times n^4 ) /( n^2 times m^-8 ) ( m! = 0 , n != 0 )

If m, n in N , then l_(m n) = int_(0)^(1) x^(m) (1-x)^(n) dx is equal to

In the figure , l||m & l||n then x is -

(xy)^(n)=x^(n)xx _______.

If f(x)=((x^(l))/(x^(m)))^(l+m)((x^(m))/(x^(n)))^(m+n)((x^(n))/(x^(l)))^(n+l) then f'(x) is equal to (a) 1 (b) 0 (c) x^(l+m+n) (d) none of these