If `f(x)=x^3-1/x^3`, 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( 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)+2x , then find the value of f(3) .

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

If f(x)=x^(3) , find the value of ({f(5)-f(1)})/((5-1))

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.

1.3.If f(x)=x+(1)/(x) ,then value of f(x)+f(1/x) is

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

If 2f(x)+3f(-x)=x^(2)-x+1, find the value of f'(1)

If 2f(x)+3f((1)/(x))=x-1. find the value of f(2) .