下面是2015年3月11日的SAT官方每日一题的内容，是关于数学方面的，题型是数学选择。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。

　　Read the following SAT test question and then click on a button to select your answer.

　　8, a, 14, b, 20, ...

　　The first term of the sequence above is 8. Which of the following could be the formula for finding the n th term of this sequence for any positive integer n ?

　　(A) 2n+6

　　(B) 3n+5

　　(C) 5n+3

　　(D) 6n+2

　　(E) 6n+5

　　The correct answer is B

　　Explanation

　　You do not know the value of the 2nd term or the 4th term of the sequence, but you do know the values of the 1st , 3rd , and 5th terms. The correct formula must give 8 as the value of the 1st term, 14 as the value of the 3rd term, and 20 as the value of the 5th term. Choice E, 6n+5 , gives 11 , not 8 , as the value of the 1st term. Choice A, 2n+6 , gives 12 , not 14 , as the value of the 3rd term. Choice C, 5n+3 , gives 18 , not 14 , as the value of the 3rd term. Choice D, 6n+2 , gives 20 , not 14 , as the value of the 3ird term. This leaves choice B, 3n+5 , which gives the correct values for the 1st , 3rd , and 5th terms of the sequence.

　　以上就是关于2015年3月11日的SAT官方每日一题中数学选择的详细内容，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。

更多出国留学最新动态，敬请关注澳际教育手机端网站，并可拨打咨询热线：400-601-0022