解；
對x求導：4y^3+10xy^6+z
對y求導：12xy^2+30x^2y^5
對z求導：x
所以
du=(4y^3+10xy^6+z)dx+(12xy^2+30x^2y^5)dy+xdz
函數(shù)u(x,y,z)=4xy^3+5x^2y^6+xz的全微分du
函數(shù)u(x,y,z)=4xy^3+5x^2y^6+xz的全微分du
其他人氣：776 ℃時間：2020-06-22 19:14:31
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