2y=-1+xy3(y的三次方),对x求导,答案是2y'=y的三次方+3x乘以y的2次方乘以y'

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2y=-1+xy3(y的三次方),对x求导,答案是2y''=y的三次方+3x乘以y的2次方乘以y''2y=-1+xy3(y的三次方),对x求导,答案是2y''=y的三次方+3x乘以y的2次方乘以y''2y=-

2y=-1+xy3(y的三次方),对x求导,答案是2y'=y的三次方+3x乘以y的2次方乘以y'
2y=-1+xy3(y的三次方),对x求导,答案是2y'=y的三次方+3x乘以y的2次方乘以y'

2y=-1+xy3(y的三次方),对x求导,答案是2y'=y的三次方+3x乘以y的2次方乘以y'
两边分别求导,得
(2y)'=(-1+xy^3)'
2y'=(xy^3)'
2y'=x'y^3+x(y^3)' (uv)'=u'v+uv'
2y'=y^3+x*3y^2*y'
2y'=y^3+3xy^2*y'
怎么又来了

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