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:作业帮 时间:2024/11/15 20:29:48
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?
x)+̫ӨЮԴ5xcɋ};lc{5**55*+*5u5 +5ԇWxںɎxoKjI*ҧEv6t Z`R!4L]"aC$l @*'

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)