两道高数的二阶偏微分题目求解蔡高厅视频107 108里的两道题Z=f{x+φ(y)} 求z对于x的二阶偏导数及先x再y的二阶偏导数将u=φ(y),z=f(x+u)然后求偏导数 2. z=y.f(x,x/y),求的跟上面一样将k=x/y,q=(x,k),z=
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![两道高数的二阶偏微分题目求解蔡高厅视频107 108里的两道题Z=f{x+φ(y)} 求z对于x的二阶偏导数及先x再y的二阶偏导数将u=φ(y),z=f(x+u)然后求偏导数 2. z=y.f(x,x/y),求的跟上面一样将k=x/y,q=(x,k),z=](/uploads/image/z/8968660-52-0.jpg?t=%E4%B8%A4%E9%81%93%E9%AB%98%E6%95%B0%E7%9A%84%E4%BA%8C%E9%98%B6%E5%81%8F%E5%BE%AE%E5%88%86%E9%A2%98%E7%9B%AE%E6%B1%82%E8%A7%A3%E8%94%A1%E9%AB%98%E5%8E%85%E8%A7%86%E9%A2%91107+108%E9%87%8C%E7%9A%84%E4%B8%A4%E9%81%93%E9%A2%98Z%3Df%7Bx%EF%BC%8B%CF%86%28y%29%7D+%E6%B1%82z%E5%AF%B9%E4%BA%8Ex%E7%9A%84%E4%BA%8C%E9%98%B6%E5%81%8F%E5%AF%BC%E6%95%B0%E5%8F%8A%E5%85%88x%E5%86%8Dy%E7%9A%84%E4%BA%8C%E9%98%B6%E5%81%8F%E5%AF%BC%E6%95%B0%E5%B0%86u%3D%CF%86%28y%29%2Cz%3Df%28x%EF%BC%8Bu%29%E7%84%B6%E5%90%8E%E6%B1%82%E5%81%8F%E5%AF%BC%E6%95%B0+++2.+z%3Dy.f%28x%2Cx%2Fy%29%2C%E6%B1%82%E7%9A%84%E8%B7%9F%E4%B8%8A%E9%9D%A2%E4%B8%80%E6%A0%B7%E5%B0%86k%3Dx%2Fy%2Cq%3D%28x%2Ck%29%2Cz%3D)
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