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For each of Questions 1 to 9, compare Quantity A and Quantity B, using additional information centered above the two quantities
For each of Questions 1 to 9, compare Quantity A and Quantity B, using additional information centered above the two quantities
admin
2014-08-13
45
问题
For each of Questions 1 to 9, compare Quantity A and Quantity B, using additional information centered above the two quantities if such information is given. Select one of the following four answer choices and fill in the corresponding oval to the right of the question.
(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.
A symbol that appears more than once in a question has the same meaning throughout the question.
选项
答案
C
解析
In this question you are asked to compare s
2
with
. Since it is given that st =
, it follows that(st)
2
=(
)
2
, and s
2
t
2
= 10. Dividing both sides of the equation s
2
t
2
= 10 by t
2
, you get s
2
=
. The correct answer is Choice C.
You can look at this problem in another way. You can use the fact that st =
to express Quantity A in terms of t. Since st =
, it follows that s =
, and Quantity A is equal to
, which is the same as Quantity B. The correct answer is Choice C.
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GRE QUANTITATIVE题库GRE分类
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GRE QUANTITATIVE
GRE
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