If f(x)=1/x and x is a natural number, what CANNOT be the answer for f(f(x))? Choose one.
A) 1/7
B) 3
C) 12/3
D) 6/6
E) 1
Answer A is impossible because the invers of 1/x is x, and the only way to have something other than a natural number is to input something other than a natural number. With the specification that only natural numbers may be used 1/7 is not a possibility for f(f(x))
<result>A</result>
If f(x)=1/x and x is a natural number, what CANNOT be the answer for f(f(x))?