求微分方程y''-y=xsinx的通解

A . y=C +C x+C e +C e B . y=C cosx+C sinx+C x+C C . y=C +C X+C e +C e D . y=C e +C e +C cosx+C sinx

A .https://assets.asklib.com/images/image2/2017051115262332611.png B .https://assets.asklib.com/images/image2/201705111526331392.png C .https://assets.asklib.com/images/image2/2017051115263940123.png D .https://assets.asklib.com/images/image2/2017051115264827726.png

A .https://assets.asklib.com/psource/1472202560549010600.png B .https://assets.asklib.com/psource/1472202567045034775.png C .https://assets.asklib.com/psource/1472202580719008560.png D .https://assets.asklib.com/psource/1472202587061009148.png

A .https://assets.asklib.com/psource/2015103009085663303.jpg B .https://assets.asklib.com/psource/2015103009091011647.jpg C .https://assets.asklib.com/psource/2015103009092395807.jpg D .https://assets.asklib.com/psource/2015103009093643077.jpg

A . y=C e +C e B . y=e （C +C x） C . y=C e +C e D . y=C e +C e

A . y=sinx+cosx+C x+C B . y=-sinx-cosx+C x+C C . y=sinx-cosx+C x+C D . y=-sinx+cosx+C x+

A．y=e^x+e^-x B．y=e^x-e^-x C．y=C₁e^x+C₂e^-x D．y=C₁e^2x+C₂e^-2x

微分方程y&quot;+2y&amp;39;+3y=0的通解为（） <img src='https://img2.soutiyun.com/ask/uploadfile/9711001-9714000/c4f899776b5c0f64cf7b4297dd6530e9.png' />

A.sinx+C1x+C2 B.sinx+C1+C2 C.-sinx+C1x+C2 D.-sinx+C1+C2

微分方程y&quot;+4y&amp;39;+4y=0的通解为() <img src='https://img2.soutiyun.com/ask/uploadfile/9819001-9822000/0114f033e5fd1ce4fe144720818b3399.png' />

求微分方程y&quot;-4y=e^x2的通解。

A．y=cos(x+c1)+c2 B．y=sin(x+c1)+c2 C．y=-In|cos(x+c1)|+c2 D．y=-In|sin(x+c1)|+c2

A．－sinx＋C1＋C2 B．－sinx＋C1x＋C2 C．－cosx＋C1x＋C2 D．sinx＋C1x＋C2