sinxy-ln(x+y)=0两边对X求导 cos(xy)(y+xy')-(1+y‘)/(x+y)=0 其中(1+y‘)/(x+y)怎么得来的?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/23 04:07:31
sinxy-ln(x+y)=0两边对X求导cos(xy)(y+xy'')-(1+y‘)/(x+y)=0其中(1+y‘)/(x+y)怎么得来的?sinxy-ln(x+y)=0两边对X求导cos(xy)(y

sinxy-ln(x+y)=0两边对X求导 cos(xy)(y+xy')-(1+y‘)/(x+y)=0 其中(1+y‘)/(x+y)怎么得来的?
sinxy-ln(x+y)=0两边对X求导 cos(xy)(y+xy')-(1+y‘)/(x+y)=0 其中(1+y‘)/(x+y)怎么得来的?

sinxy-ln(x+y)=0两边对X求导 cos(xy)(y+xy')-(1+y‘)/(x+y)=0 其中(1+y‘)/(x+y)怎么得来的?
ln(x+y)求导=1/(x+y)*(x+y)'
=1/(x+y)*(1+y')
=(1+y')/(x+y)