f(x) = 1/(1-x) find(f(f(f(x)))  Pick
A) 1  B) x  C) 2x  D) 3x  E) 0
f(x) = 1/(1-x)   ==&gt;f(f(x)) = f(1/(1-x))   = 1/(1-(1/(1-x)))   = 1/((1-x-1)/(1-x))   = 1/(-x/(1-x))   = x-1/x   ==&gt; (f(f(f(x)))=f(x-1/x)   = 1/(1-(x-1/x))   = 1/((x-x+1)/x)   = 1/(1/x)   = x   ANSWER:x
<result>B</result>
f(x) = 1/(1-x) find(f(f(f(x)))