高等数学,如图
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设 dx/dy = A(y), 则 dy/dx = B(x) = 1/A(y(x))
d(1/A)/dx + (x+e^(2y)) (1/A)^3 = 0
-(1/A)^2(dA/dx)+ (x+e^(2y)) (1/A)^3 = 0
-(1/A)^2(dA/dy)(1/A)+ (x+e^(2y)) (1/A)^3 = 0
[-(dA/dy)+ (x+e^(2y))] = 0
d^2x/dy^2 = x + e^(2y)
d(1/A)/dx + (x+e^(2y)) (1/A)^3 = 0
-(1/A)^2(dA/dx)+ (x+e^(2y)) (1/A)^3 = 0
-(1/A)^2(dA/dy)(1/A)+ (x+e^(2y)) (1/A)^3 = 0
[-(dA/dy)+ (x+e^(2y))] = 0
d^2x/dy^2 = x + e^(2y)
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