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2017年2月15日SAT官方每日一题---数学选择.

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  下面是2014年2月15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。大家和澳际小编一起来看一下这个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.

  A manager estimates that if the company chargesdollars for their new product, where, then the revenue from the product will bedollars each week. According to this model, for which of the following values ofwould the company’s weekly revenue for the product be the greatest?

  (A)

  (B)

  (C)

  (D)

  (E)

  The correct answer is D

  Explanation

  The graph ofis a downward-facing parabola that intersects the-axis atand at. Parabolas are symmetric, so the maximum value ofoccurs at, which is halfway betweenand. (When, the value ofis.)

  下面为大家提供一些和这些SAT官方每日一题相似的题目,供大家练习:

  First,is subtracted fromand the square root of the difference is taken. Then,is added to the result, giving a final result of. What is the value of?

  (A)

  (B)

  (C)

  (D)

  (E)

  The correct answer is E

  Explanation

  Whenis subtracted from, the result is. The square root of this difference is. Whenis added to, the final result is. This can be written as. Subtractingfrom both sides gives the equation. Squaring both sides of this equation gives, or.

  以上就是关于2014年2月15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。

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