Give a quick stream of consciousness before answering the following question. If f(x)=1/x and x is a natural number, what CANNOT be the answer for f(f(x))?\nOptions:\n(A) 1/7\n(B) 3\n(C) 12/3\n(D) 6/6\n(E) 1
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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 answer: (A).
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