下面是2013年3月11日的SAT官方每日一题的内容，是关于数学方面的，题型是选择。SAT官方每日一题是collegeboard每天都会发布的题目，关于SAT考试的三个部分的各个题型。下面我们就一起来看一下这个SAT官方每日一题吧。
SAT官方每日一题之数学---选择：
Mathematics > Standard Multiple Choice
Read the following SAT test question and then click on a button to select your answer.
,
,
,
,
, ...
The first term of the sequence above is
. Which of the following could be the formula for finding the
term of this sequence for any positive integer
?
(A)
(B)
(C)
(D)
(E)
The correct answer is B
Explanation
You do not know the value of the
term or the
term of the sequence, but you do know the values of the
,
, and
terms. The correct formula must give
as the value of the
term,
as the value of the
term, and
as the value of the
term. Choice E,
, gives
, not
, as the value of the
term. Choice A,
, gives
, not
, as the value of the
term. Choice C,
, gives
, not
, as the value of the
term. Choice D,
, gives
, not
, as the value of the
term. This leaves choice B,
, which gives the correct values for the
,
, and
terms of the sequence.
下面是一道和SAT官方每日一题相似的题目，供大家练习：
If the graph of the function 
in the 
-plane contains the points 
, 
, and 
, which of the following CANNOT be true?
Answer Choices
(A) The graph of 
has a maximum value.
(B) 
for all points 
on the graph of 
.
(C) The graph of 
is symmetric with respect to a line.
(D) The graph of 
is a line.
(E) The graph of 
is a parabola.
The correct answer is D
Explanation
If the graph of the function 
, which contains the points 
, 
, and 
, were a line, then the slope of the segment connecting the points 
and 
would be the same as the slope of the segment connecting the points 
and 
. However, the slope of the segment connecting the points 
and 
is 
, and the slope of the segment connecting the points 
and 
is 
. Therefore, the graph of 
cannot be a line.
The statements in the other four options could be true. For example, if the equation of 
were 
, then the graph of 
would contain the points 
, 
, and 
. The graph of 
would be a parabola symmetric with respect to the line with equation 
. The maximum value of 
would occur at the point 
, and 
would be true for all points 
on the graph of 
.
以上就是关于2013年3月11日SAT官方每日一题中数学部分的详细内容，包括了题目和选项以及答案，后面附有一道相关的练习题。大家可以在备考SAT的过程中关注SAT每日一题的内容，这样就可以更好有不间断的练习，也就能在日积月累的过程中得到提高。
