If f(x)=x1−xf(x) = \frac{x}{1-x}f(x)=1−xx for x≠1x \neq 1x=1, which of the following is equivalent to the composition (f∘f∘f)(x)(f \circ f \circ f)(x)(f∘f∘f)(x)?
f(x)
-f(x)
x
1/f(x)