作者childcathy (去海边～～)
看板GMAT
标题Re: [计量] GWD26-09
时间Sat Jun 14 16:22:08 2008
※ 引述《PINKENVI (非要考好不可!)》之铭言：
: Q9:
: How many years did Dr. Jones live?
: (1) If Dr. Jones had become a doctor 10 years earlier than he did,
: he would have been a doctor for exactly 2/3 of his life.
: (2) If Dr. Jones had become a doctor 10 years later than he did,
: he would have been a doctor for exactly 1/3 of his life.
: ANS: C
: 可以请教此题列式吗...
: 我知道答案是c，可是我不太清楚如何列式。脑筋有点转不过来...@@
: 请指点迷津，thanks a lot...
可把总年龄设为X ，当医生的年纪设为Y
第一个条件可得 『X-(Y-10)』=2/3X
第二个条件可得 『X-(Y+10)』=1/3X
两方程式解联立
就OK搂
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1F：推 PINKENVI:非常感谢.... 06/14 16:26