求导虽然方向对,但还是拉格朗日最简单直接
题改了以后是必须求导,其他代数几何方法都不好使了,证明以前的做法都是奇淫巧计
本帖于 2018-01-30 14:54:06 时间, 由普通用户 wzg69 编辑
求导虽然方向对,但还是拉格朗日最简单直接
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