if f ( x ) = 1 / x and x is a natural number , what can not be the answer for f ( f ( x ) ) ?
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 ) )
divide(multiply(1, const_1), subtract(multiply(const_2, const_4), 1))