單項選擇題
A.c1y1+c2y2 B.c1Y1(x)+c2Y2(x) C.c1y1+c2y2+Y1(x) D.c1y1+c2y2+Y1(x)+Y2(x)
A.c1y1+c2y2+y3 B.c1y1+c2y2-(c1+c3)y3 C.c1y1+c2y2-(1-c1-c2)y3 D.c1y1+c2y2+(1-c1-c2)y3
A.y″+9y′=0 B.y″-9y′=0 C.y″+9y=0 D.y″-9y=0
A.f1(x)f′2(x)-f2(x)f′1(x)=0 B.f1(x)f′2(x)-f2(x)f′1(x)≠0 C.f1(x)f′2(x)+f2(x)f′1(x)=0 D.f1(x)f′2(x)+f2(x)f′1(x)≠0
A.y=cy1(x)+y2(x) B.y=y1(x)+c2y2(x) C.y=c[y1(x)+y2(x)] D.y=c1y(x)-y2(x)
A.可分離變量方程 B.一階線性的微分方程 C.全微分方程 D.齊次方程
A.x2ex B.ex C.xex D.(x+2)ex
A.lnx+c B.ln(x+C. C.c2+ln│x+c1│ D.c2-ln│x+c1│
A.1+x2=cy B.(1+x2)(3+2y)=c C. D.(1+x2)2(3+2y)=c
A.y″-2y′-3y=0 B.y″+2y′-3y=0 C.y″-3y′+2y=0 D.y″+2y′+y=0
A.y=c(y1-y2) B.y=c(y1+y2) C.y=y1+c(y1+y2) D.y=y1+c(y1-y2)