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Lagrange一阶拟线性偏微分方程式的简介
9:25
Added: 4 years ago
From: PengTitus
Views: 3,061
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  • 在一開始

    u對x的偏微分 = u對x的偏微分 * x對x的偏微分

    x對x的偏微分等於1可以明白

    但是老師說等式左邊的u對x的偏微分等於0

    那等式右邊u對x的偏微分不也應該等於0嗎?

    那又怎麼可以移項呢?

    麻煩老師解惑，謝謝老師!

    andy68292008 2 years ago

  • @andy68292008

    z(x,y)函數有x所以可以偏微分

    stanley2036 1 year ago

  • @andy68292008

    左邊的u(x,y,z(x,y))和右邊的u(x,y,z)變數­有點不一樣

    freagogo 11 months ago

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