SAT2数学部分是中国考生首选的考试科目。之所以这样,是因为大家认为在这部分考试中,更加有优势,容易拿到更高的分数。那么在备考中,SAT2数学的哪些资料能够辅助大家呢?下面小编为大家整理了详细的内容,供大家参考!

  32. Difficulty: 3

  Choice (C) is correct.

  A correct matrix representation must have exactly three entries, each of which represents the total

  income, in dollars, for one of the three days. The total income for Day 1 is given by the arithmetic expression 99 × 20 + 199 × 16 + 299 × 19, which is the single

  20

  entry of the matrix product 9919929916;

  19

  in the same way, the total income for Day 2 is given by 99 × 18 + 199 × 5 + 299 × 11, the single entry of

  18

  991992995; and the total income for Day

  113 is given by 99 × 3 + 199 × 8 + 299 × 10, the single 3

  entry of 991992998. Therefore, the matrix

  10

  20183

  representation 991992991658 gives the

  191110total income, in dollars, received from the sale of the cameras for each of the three days. Although it is not

  necessary to compute the matrix product in order to answer

  20183

  the question correctly, 991992991658

  191110

  equals 10,8456,0664,879.

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  以上是小编为大家分享的“【数学】SAT2数学真题!有钱难买的好资料“资料,希望可以指导大家有效备考SAT。

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