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标题: [求助]GWD-29-24 [打印本页]

作者: tulipmontrealer 时间: 2007-9-27 07:02 标题: [求助]GWD-29-24

Q24:

Which of the following is closest in value to 9⁹ – 9² ?

A. 9⁹

B. √9⁸

C. 9⁷

D. 9⁶

^E.9⁵

^{答案是A。}

^{对于这种题型应该怎么做啊？完全不懂，随便猜了个B。}

^谢谢大虾

作者: XIAOYUE78 时间: 2007-9-27 14:02

数量级，9⁹-81怎么也比其他的大

作者: Economics 时间: 2007-9-27 20:09

x=[( 9⁹ – 9² )/备选答案]-1,然后比较x的绝对值

作者: himba 时间: 2007-9-28 06:41

QUOTE:

Q24:

Which of the following is closest in value to 9⁹ – 9² ?

A. 9⁹

B. √9⁸

C. 9⁷

D. 9⁶

^E.9⁵

^{答案是A。}

^{对于这种题型应该怎么做啊？完全不懂，随便猜了个B。}

^谢谢大虾

好象应该这样做吧: 9⁹ – 9² = 9² ( 9⁷ – 1 ) 约= 9² 9⁷ 约= 9⁹

作者: tulipmontrealer 时间: 2007-10-5 13:55

thanks  a  lot !!!!!!!!!!!!!!!

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