单选题若y2(x)是线性非齐次方程y′+P(x)y=Q(x)的解,y(x)是对应的齐次方程y′+P(x)y=0的解,则下列函数中哪一个是y′+P(x)y=Q(x)的解()?Ay=cy1(x)+y2(x)By=y1(x)+c2y2(x)Cy=c[y1(x)+y2(x)]Dy=c1y(x)-y2(x)
单选题
若y2(x)是线性非齐次方程y′+P(x)y=Q(x)的解,y(x)是对应的齐次方程y′+P(x)y=0的解,则下列函数中哪一个是y′+P(x)y=Q(x)的解()?
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)
参考解析
解析:
由一阶线性非齐次方程通解的结构确定,即由对应齐次方程的通解加上非齐次的一特解组成。
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