SAT I 每日一問:2013年9月1日
作者:滬江英語
來源:CollegeBoard
2013-09-02 10:33
The correct answer is C
Explanation
The graph of the function ?is the same as the graph of the function ?translated up ?units. The function ?intersects the ?three times, but if the graph is shifted up ?units, then the graph will intersect the ?only twice. Therefore, ?is equal to ?for exactly two values of ?between ?and .