2016年5月8日GRE数学真题回顾及解析

2022-06-05 13:47:06

  在备考

  5月8日

  1. Each week a salesperson receives a commission that is equal to 12 percent of the first $500 of sales plus 20 percent of additional sales. If the salesperson received a commission of $380 last week, what was the total amount of the sales that the salesperson made last week?

  6. $1,600

  7. $1,660

  8. $1,860

  9. $2,000

  10. $2,100

  2. x ≠ 0

  Quantity A: x^2

  Quantity B: x(x+5)

  A. Quantity A is greater.

  B. Quantity B is greater.

  C. The two quantities are equal

  D. The relationship cannot be determined from the information given.

  答案:D

  解析:如果x>0, 则B>A; 如果x<0, 则B

  3. n is an integer.

  Quantity A:(-1)^n*(-1)^(n+2)

  Quantity B:1

  A. Quantity A is greater.

  B. Quantity B is greater.

  C. The two quantities are equal

  D. The relationship cannot be determined from the information given.

  答案:C

  解析:如果n是奇数,则负负得正等于1;如果n是偶数,依然是1

  4. 1/2 < r <1

  Quantity A:2r

  Quantity B:1/r

  A. QuantityA is greater.

  B. QuantityB is greater.

  C. The twoquantities are equal

  D. Therelationship cannot be determined from the information given.

  答案:D

  解析:如果r为1,则A>B, 如果r为0.1, 则A

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