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标题: GWD-1-10 [打印本页]

作者: tulipmontreals 时间: 2007-8-21 07:03 标题: GWD-1-10

What is the value of (x - y)⁴?

(1) The product of x and y is 7.

(2) x and y are integers.

A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.

B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.

C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

D. EACH statement ALONE is sufficient.

E. Statements (1) and (2) TOGETHER are NOT sufficient.

作者: zhangzhiming 时间: 2007-8-21 14:08

(1)+(2) => 整数X*Y=7 =>X=1,Y=7 or X=-1, Y=-7 => (X-Y)^4 = 6^4 所以选C.

作者: tulipmontreals 时间: 2007-8-21 18:31

哦，我晕！！！谢谢谢谢，明白了，整数。。。。。

作者: daizexia90 时间: 2007-8-22 06:33

 呵呵，我也犯了相同的错误。然后自己想明白了。^_^，谢谢.

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