[理工] [工數] 二階ODE
1. find the general solution
(1+x^2)y'' - 2xy' + 2y = 0
2. Solve the general solutions of x(t) and y(t)
2
d x
_______ - x - 2y = t
2
d t
2
d y
_______ - 2y - 3x = 1
2
d t
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