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[不等式] 最值 3/x-4/y

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chudengshuxue posted 2018-5-19 22:18 |Read mode
Last edited by hbghlyj 2025-3-19 17:32若正数 $x, y$ 满足 $x^2+y^2+\frac{1}{x}+\frac{1}{y}=\frac{17}{4}$ ,则 $\frac{3}{x}-\frac{4}{y}$ 的最大值为

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kuing posted 2018-5-19 22:24

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isee posted 2018-5-19 22:30

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original poster chudengshuxue posted 2018-5-19 22:46
谢谢!

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kuing posted 2018-5-19 23:42
回复 3# isee

搜索速度不够俺快 俺搜 frac{17}{4} 搜全文一下就搜出来了

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isee posted 2018-5-20 07:58
回复 5# kuing


还能这样,我直接向下翻的。。。。看标题凭感觉。。。

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kuing posted 2018-5-20 12:13
回复 6# isee

因为我记得那帖是用代码打的,所以直接搜代码。打代码的好处,坚持贴图的无法体会。

顺便改了标题,下次搜就更容易了。

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