2015年9月1日SAT官方逐日一題
標題範例:Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
(A) None
(B) One
(C) Two
(D) Three
(E) More than three
謎底:C
【剖析】The graph of the function g is the same as the graph of the function f translated up 4 units. The function f intersects the x-axis three times, but if the graph is shifted up 4 units, then the graph will intersect the x-axis only twice. Therefore, g(x) is equal to o for exactly two values of x between -5 and 15 .