GRE考试

【单选题】Directions for QuantitativeComparison Questions: Some of the following questions give you two quantities, one inColumn
A、and one inColumnB,Compare the two quantities and choose one of the following answer choices:

A、if the quantity inColumn
A、is greater;

B、if the quantity in column
B、is greater;
C．if the two quantities are equal;
D．if you cannot determine the relationship based on the given information

网考网参考答案：D
网考网解析：
To solve this problem, transform the phrase "When the square of 2a is multiplied by 2, the result is n" into its mathematical equivalent, as follows: n=2(2a) 2 2(4a 2 )=8a 2 The quantity [*] can be put in terms of a by substituting 8a 2 for n and simplifying as follows: [*] However, without information about whether a is positive or negative, it is impossible to determine which quantity is greater. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>