单选题设非齐次线性微分方程y′+P(x)y=Q(x)有两个不同的解y1(x),y2(x),C为任意常数,则该方程的通解是( )。AC[y1(x)-y2(x)]By1(x)+C[y1(x)-y2(x)]CC[y1(x)+y2(x)]Dy1(x)+C[y1(x)+y2(x)]
单选题
设非齐次线性微分方程y′+P(x)y=Q(x)有两个不同的解y1(x),y2(x),C为任意常数,则该方程的通解是( )。
A
C[y1(x)-y2(x)]
B
y1(x)+C[y1(x)-y2(x)]
C
C[y1(x)+y2(x)]
D
y1(x)+C[y1(x)+y2(x)]
参考解析
解析:
由题意可知,y=y1(x)-y2(x)是y′+P(x)y=0的一个解,则y′+P(x)y=0的通解是C[y1(x)-y2(x)]。故所求方程通解为y1(x)+C[y1(x)-y2(x)]
由题意可知,y=y1(x)-y2(x)是y′+P(x)y=0的一个解,则y′+P(x)y=0的通解是C[y1(x)-y2(x)]。故所求方程通解为y1(x)+C[y1(x)-y2(x)]
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