[理工] [工數]-高階ODE Euler cauchy方程
3 2 6x^3
x y''' - 4x y'' + 8xy' - 8y = ──────── <<94中興化工>>
(x^2 + 1 )^3/2
這題yp項= = 我算了好久 用部份分式 或是重積分法 加上 三角代換
都展不回他給的答案 3 5
2 4 2x + 4x + 2x
y(x) = c1x + c2x + c3x - ─────────
√(1+x^2)
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