 
 <translate> 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)) The final answer: (A). <hau> Amsar A ba zai yiwu ba saboda inverse na 1/x shine x, kuma hanya daya tilo da za a samu wani abu ban da lamba ta halitta ita ce shigar da wani abu ban da lamba ta halitta. Tare da ƙayyadadden cewa za'a iya amfani da lambobi na halitta kawai 1/7 ba shi da yiwuwar f ((f ((x)) Amsar karshe: (A). 