[理工] 高階O.D.E.
題目是y''''+8y''+16y=64tsin(2t)
齊性解yh由(D^2+4)^2y=0 可知yh=C1*cos(2t)+C2*sin(2t)+C3*t*cos(2t)+C4*t*sin(2t)
我想要問特解yp該如何用逆運算子的方式求得
又特解yp想用未定係數法 我應該怎麼另
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