设向量组(Ⅰ):α 1 ,α 2 ,…,α s 的秩为r 1 ,向量组(Ⅱ):β 1 ,β 2 ,…,β s 的秩为r 2 ,且向量组(Ⅱ)可由向量组(Ⅰ)线性表示,则______。
A.
α 1 +β 1 ,α 2 +β 2 ,…,α s +β s 的秩为r 1 +r 2
B.
向量组α 1 -β 1 ,α 2 -β 2 ,…,α s -β s 的秩为r 1 -r 2
C.
向量组α 1 ,α 2 ,…,α s ,β 1 ,β 2 ,…,β s 的秩为r 1 +r 2
D.
向量组α 1 ,α 2 ,…,α s ,β 1 ,β 2 ,…,β s 的秩r 1
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