z=sin(x-y)求dz| x=1 y=1时的全微分
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z=sin(x-y)求dz|x=1y=1时的全微分z=sin(x-y)求dz|x=1y=1时的全微分z=sin(x-y)求dz|x=1y=1时的全微分z对x求偏导得cos(x-y)*1z对y求偏导得c
z=sin(x-y)求dz| x=1 y=1时的全微分
z=sin(x-y)求dz| x=1 y=1时的全微分
z=sin(x-y)求dz| x=1 y=1时的全微分
z对x求偏导得cos(x-y)*1
z对y求偏导得cos(x-y)*(-1)
dz|x=1 y=1得全微分为cos(x-y)*dx+cos(x-y)*(-1)dy=cos(x-y)*(dx-dy)
设z=sin(x-y)求dz| x=1 y=1时的全微分
z=sin(x-y)求dz| x=1 y=1时的全微分
z=sin(x-y)求dz| x=1 y=1时的全微分
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