设 α是非齐次线性方程组Ax=b的解, β是其导出组Ax=0的解,则以下结论正确的是()
A.α+ β是Ax=0的解
B.α +β 是Ax=b的解
C.β -α 是Ax=b的解
D.α -β 是Ax=0的解
正确答案是B
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