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 weights of bags of apples range from pounds to pounds. If is the weight, in pounds, of one of these bags, which of the following must be true?
Answer Choices
(A)
(B)
(C)
(D)
(E)
The correct answer is B
Explanation
If is the weight, in pounds, of one of the bags of apples, then it must be true that , because the weights of the bags range from pounds to pounds. These inequalities are equivalent to , which are equivalent to . Using the definition of absolute value, you have .
