If f(x) = -*5 (x^4 - 1)/(x^2), what is f(1/x) in terms of f(x)?
Choose the correct option.
A) f(x)	B) -f(x)	C) 1/f(x)	D) 5f(x)	E) 2*f(x)
-5*f(1/x) =-5* ((1/x)^4 - 1) / ((1/x)^2)   = -5*((1/x^4) - 1) / (1/x^2)   = -5*((1-x^4)/(x^4)) / (1/x^2)   = -5* (1-x^4)/(x^2)   = -5* ( (x^4) -1) / (x^2)   = 5f(x)   Answer is 5f(x).
<result>D</result>
If f(x) = -*5 (x^4 - 1)/(x^2), what is f(1/x) in terms of f(x)?