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[函数] 两变量最小值问题

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敬畏数学 posted 2017-3-16 17:21 |Read mode
15x-y=22,x,y均为正数,则x^3+y^3-x^2-y^2的最小值为——————?导数应该可以解决,求其它方法。。。。

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original poster 敬畏数学 posted 2017-3-17 18:27
回复 1# 敬畏数学 ??
???最近很冷清啊。

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kuing posted 2017-3-17 18:35
回复 2# 敬畏数学

没什么好玩的题,没回帖欲了

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绝艺如君 posted 2017-3-18 09:25
回复 1# 敬畏数学

拉格朗日乘数法,很快就出来了

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Tesla35 posted 2017-3-18 23:20
据说某地一模啊。

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其妙 posted 2017-3-19 23:49
妙不可言,不明其妙,不着一字,各释其妙!

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original poster 敬畏数学 posted 2017-3-20 09:51
谢谢。详细过程。辛苦。看来此题不好玩啊。

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其妙 posted 2017-3-21 17:56
回复 7# 敬畏数学
再给你一个链接:blog.sina.com.cn/s/blog_54df069f0102x1q6.html

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