2.求由方程 y=xsin(x+y) 所确定的隐函数y=y(x)导数
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y=xsin(x+y)
y' = sin(x+y) + xcos(x+y). (x+y)'
= sin(x+y) + xcos(x+y). (1+y')
[1-xcos(x+y)]y'穗胡喊猜野=sin(x+y)+xcos(x+y)
y'做迟=[sin(x+y)+xcos(x+y)]/[1-xcos(x+y)]
y' = sin(x+y) + xcos(x+y). (x+y)'
= sin(x+y) + xcos(x+y). (1+y')
[1-xcos(x+y)]y'穗胡喊猜野=sin(x+y)+xcos(x+y)
y'做迟=[sin(x+y)+xcos(x+y)]/[1-xcos(x+y)]
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