设y1,y2,y3都是微分方程y"+P(x)y′+Q(x)y=f(x)的解,且(y1-y3)/(y2-y3)≠常数,则该微分方程的通解为()
A.y=C1y1+C2y2+y3 B.y=C1y1+C2y2-(C1-C2)y3 C.y=C1y1+C2y2-(1-C1-C2)y3 D.y=C1y1+C2y2+(1-C1-C2)y3正确答案D
设y1,y2,y3都是微分方程y"+P(x)y′+Q(x)y=f(x)的解,且(y1-y3)/(y2-y3)≠常数,则该微分方程的通解为()
A.y=C1y1+C2y2+y3 B.y=C1y1+C2y2-(C1-C2)y3 C.y=C1y1+C2y2-(1-C1-C2)y3 D.y=C1y1+C2y2+(1-C1-C2)y3正确答案D