若y2(x)是线性非齐次方程y'+ P(x)y=Q(x)的解,y1(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=cy1(x)-y2(x)
若y2(x)是线性非齐次方程y'+ P(x)y=Q(x)的解,y1(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=cy1(x)-y2(x)
A. y=cy1(x)+y2(x) B. y=y1(x)+c2y2(x)
C. y=c[y1(x)+y2(x)] D. y=cy1(x)-y2(x)
参考解析
解析:提示: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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