作者cbrf (人品)
看板GMAT
标题Re: [机经] 11月JJ-205 MATH
时间Fri Oct 30 06:55:59 2009
※ 引述《a2515125 (Bobshih)》之铭言：
: x,y皆>0，问 y/(x^(1/2))+(x^(1/2))/x 为多少?
: JJ: (y+1)/(x^(1/2))
: 想请教如何变的
[y/x^(1/2)] + [x^(1/2)/x]
=[y*x^(1/2)/x] + [x^(1/2)/x]
=x^(1/2)(y+1)/x
=(y+1)/x^(1/2)
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1F：推 a2515125:感谢 10/30 16:11