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标题: [求助]GWD29-30 [打印本页]

作者: ilovecushi 时间: 2007-11-11 12:07
标题: [求助]GWD29-30

Q30:

What is the value of (2x – 5)³ ?

(1) (2x)³ = 216

(2) (2x + 3)² = 81

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.

答桊是E 给矇对了
但不懂围什麽

作者: emilyer720 时间: 2008-1-4 15:09

答案是A吧

(2x)³= 6³

2x= 6

帶入題目給的式子就可以解了

(2x + 3)² = 9²or (-9)²

值不固定

作者: YiYaYiYaYou 时间: 2008-1-4 15:39
妹妹你蹭啥呢？

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