来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/12 02:55:58
(x-1)/[(x-1)^2 -y]对x,y分别求导
求一个稍微详细一点的过程
设z=(x-1)/[(x-1)^2 -y]
=(x-1)/(x²-2x+1-y)
则∂z/∂x
=[1*(x²-2x+1-y)-(x-1)(2x-2)]/(x²-2x+1-y)²
=(-x²+2x-1-y)/(x²-2x+1-y)²
∂z/∂y
=-(x-1)/(x²-2x+1-y)²*(x²-2x+1-y)'
=(x-1)/(x²-2x+1-y)²