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JefferyWong 发表于 2018-2-21 22:29 楼主,圆那题根据R1R2的关系好像能解出来两个值是相等的。。。。
gmatonetime 发表于 2018-2-19 06:50 first question: the answer should be 5x=(5y+5)/(1-y) is it correct?
leochan96 发表于 2018-2-23 07:49 i didn't make it. could you please post the solotion?
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