已知yz+zx+xy=1,确定的z=z(x,y),求dz.
已知yz+zx+xy=1,确定的z=z(x,y),求dz.
数学人气:911 ℃时间:2020-02-04 21:26:51
优质解答
(x/(y+x)^2)dy+(y/(y+x)^2)dx可否写详细点?把 z用 x,y表示,然后求一下偏微分就出来了,很简单
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