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e^x-e^y=sin(xy)
两边对x求导,把y看成复合函数:
e^x-y'e^y=cos(xy)(xy)'
e^x-y'e^y=cos(xy)(y+xy')
e^x-ycos(xy)=y'[e^y+xcos(xy)]
y'=[e^x-ycos(xy)]/[e^y+xcos(xy)]
故dy=[e^x-ycos(xy)]/[e^y+xcos(xy)]dx
两边对x求导,把y看成复合函数:
e^x-y'e^y=cos(xy)(xy)'
e^x-y'e^y=cos(xy)(y+xy')
e^x-ycos(xy)=y'[e^y+xcos(xy)]
y'=[e^x-ycos(xy)]/[e^y+xcos(xy)]
故dy=[e^x-ycos(xy)]/[e^y+xcos(xy)]dx
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