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( 1/x )

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

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

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

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

Let f(x) = 5^x/(5^x +5) Then find the value of f(1/20) + f(2/20) + f(3/20) + . . . + f(39/20)

(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)=(x-1)/abs(x-1) find the value of f(-1) and f(2)

If f(x) is real valued function such that (f(x-1)+f(x+1))/(2f(x))=sin60^(@),AA x in R then find the value of f(x-1)+f(x+5)