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2012年11月20 SAT官方每日一題
考試類型: Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
for all integers
If 
is a function defined for all positive integers , and satisfies the two conditions above, which of the following could be the definition of ?
A. 
B. 
C. 
D. 
E. 
