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Each of Questions 1 to 7 presents two quantities. Quantity A and Quantity B. Compare the two quantities. You may use additional
Each of Questions 1 to 7 presents two quantities. Quantity A and Quantity B. Compare the two quantities. You may use additional
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2013-05-19
41
问题
Each of Questions 1 to 7 presents two quantities. Quantity A and Quantity B. Compare the two quantities. You may use additional information centered above the quantities if such information is given. Choose one of the following answer choices:
A if Quantity A is greater;
B if Quantity B is greater;
C if the two quantities are equal;
D if you cannot determine the relationship based on the given information.
选项
A、
B、
C、
D、
答案
A
解析
The correct answer is A. To solve this problem, find the interval of x for which(x+4)(x-2)<0. The expression(x+4)(x-2)is equal to zero when x=-4 and x-2. It would then make sense to try a few test values for x to see when(x+4)(x-2)is less than 0.
For x<-4,(x+4)(x-2)>0.
For-4
Finally, for x>2,(x+4)(x-2)>0.
Thus the interval of x for which(x+4)(x-2)<0 is -4
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