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Mathematics>Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
f(2n) = 2f(n) for all integers n
f(4) = 4
If f is a function defined for all positive integers n, and f satisfies the two conditions above, which of the following could be the definition of f?
(A) f(n) = n-2
(B) f(n) = n
(C) f(n) = 2n
(D) f(n) = 4
(E) f(n) = (2n)-4
