若A是矩阵,B是矩阵,且AB=O,则必有r(B)+r(A)______./ananas/latex/p/111984/ananas/latex/p/112245/ananas/latex/p/1237
若A是矩阵,B是矩阵,且AB=O,则必有r(B)+r(A)______./ananas/latex/p/111984/ananas/latex/p/112245/ananas/latex/p/1237
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