1
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B
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2016
锛?/p>
(
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)
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1
锛庤嫢
A
锛?/p>
B
涓?/p>
n
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AB=BA
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锛?/p>
(A)
1
1
飥?/p>
飥?/p>
飥?/p>
AB
A
B
(
B
)
1
1
飥?/p>
飥?/p>
飥?/p>
BA
AB
(C)
B
A
BA
1
1
飥?/p>
飥?/p>
飥?/p>
(D)
1
1
1
1
飥?/p>
飥?/p>
飥?/p>
飥?/p>
飥?/p>
A
B
B
A
2
锛庤嫢鐢?/p>
AB=AC
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B=C
锛?/p>
A
锛?/p>
B
锛?/p>
C
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n
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A
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锛?/p>
(A)A
鈮?/p>
O
(B)A=O
(
C
)
0
飩?/p>
A
(D)
0
飩?/p>
AB
3
锛庤
A
锛?/p>
B
鍧囦负
n
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AB
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锛?/p>
锛?/p>
A
锛?/p>
锛?/p>
0
飥?/p>
A
鎴?/p>
0
飥?/p>
B
锛?/p>
B
锛?/p>
A= O ,
鎴?/p>
B=O
锛?/p>
C
锛?/p>
A+B=O
锛?/p>
D
锛?/p>
O
B
A
飥?/p>
飥?/p>
4
锛庤
A
涓?/p>
n
脳
n
闃剁煩闃碉紝濡傛灉
r(A)<n ,
鍒?/p>
(A) A
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(B) A
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(
C
)A
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