If f(x) =6* (x^4 - 1)/(x^2), what is f(1/x) in terms of f(x)?  Pick:
A) f(x) B) -f(x) C) 1/f(x) D) -1/f(x) E) -6*f(x)
f(1/x) =6* ((1/x)^4 - 1) / ((1/x)^2)   = 6*((1/x^4) - 1) / (1/x^2)   = 6*((1-x^4)/(x^4)) / (1/x^2)   = 6*(1-x^4)/(x^2)   = - 6*( (x^4) -1) / (x^2)   = -6f(x)   Answer is -6*f(x).
<result>E</result>
If f(x) =6* (x^4 - 1)/(x^2), what is f(1/x) in terms of f(x)?