If f(x ) = `x^3 - 1/x^3` , then find the value of `f(x) + f( 1/x )`

If f(x) = x^5 - 1/x^5 then find the value of f(x) + f(1/x)

If f(x)=x^(3)-(1)/(x^(3)) , then find the value of f(x)+f(-x) .

If f(x)=x^(3)+2x , then find the value of f(3) .

If f(x) = (x + 1)/(x-1) , then the value of f{f(3)} is :

(i) If f(x) = 3x^(4)- 5x^(2) + 7, " find " f(x-1) (ii) If f(x) = x^(2) - 3x + 4 , then find the values of x satisfying f(x) = f(2x+1)

If f(x) = 1/( 1 - x ) , find the value of f[ f ( f(x) ) ]

Ilf f(x)={x^3, x 2 , then find the value of f(-1)+f(1)+f(3) . Also find the value (s) of x for which f(x)=2.

Find the value of f(f(-2)) , if f(x)=(x)/(x+1)

If f(x)=x^(2+x+1 , then find the value of 'x' for which f(x-1) =f(x)

If f (x) = x^(2) -2x + 3, then the value of x for which f (x) = f(x +1) is