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