作者j19880706 (smallpig)
看板trans_math
标题[考古] 92年 计算题
时间Sat Apr 28 20:19:49 2007
Find the minimum of the function f(x,y,z)=xy+4yz+8xz
subject to the constraint xyz=256
(The existence of the minimum is suggested by the geometry of the problem.)
这题要怎麽算 要用微分吗
麻烦大大教教我
谢谢您
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1F：推 ahongyeh:这题我用算几不等式就算出来了耶.. 219.68.189.249 04/29 11:01
2F：推 astroinsky:这题是用Lagrange算喔 218.187.71.229 04/29 11:06