大一高数,隐函数的导数
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y=tan(x+y)
arctany = x+y
[1/(1+y^2)] dy/dx = 1+ dy/dx
dy/dx =-(1/y^2) -1
d^2y/dx^2
= (2/y^3)(dy/dx)
=(2/y^3)(-(1/y^2) -1)
=-2( 1/y^5 + 1/y^3 )
arctany = x+y
[1/(1+y^2)] dy/dx = 1+ dy/dx
dy/dx =-(1/y^2) -1
d^2y/dx^2
= (2/y^3)(dy/dx)
=(2/y^3)(-(1/y^2) -1)
=-2( 1/y^5 + 1/y^3 )
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