1
21.2
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绗竴璇炬椂
鏁欏鍐呭
a
路
b
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ab
锛?/p>
a
鈮?/p>
0
锛?/p>
b
鈮?/p>
0
锛?/p>
锛屽弽涔?/p>
ab
=
a
路
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锛?/p>
a
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0
锛?/p>
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0
锛夊強鍏惰繍鐢紟
鏁欏鐩爣
鐞嗚В
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b
锛?/p>
ab
锛?/p>
a
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0
锛?/p>
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ab
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a
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a
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鐢卞叿浣撴暟鎹紝鍙戠幇瑙勫緥锛屽鍑?/p>
a
路
b
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ab
锛?/p>
a
鈮?/p>
0
锛?/p>
b
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0
锛夊苟杩愮敤瀹冭繘琛岃绠楋紱
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鍒╃敤閫嗗悜鎬濈淮锛屽緱鍑?/p>
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=
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a
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0
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0
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鏁欏閲嶉毦鐐瑰叧閿?/p>
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a
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b
锛?/p>
ab
锛?/p>
a
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锛夊強瀹冧滑鐨勮繍
鐢紟
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a
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0
锛?/p>
b
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0
锛?/p>
锛?/p>
鍏?/p>
閿?/p>
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瑕?/p>
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娓?
ab
锛?/p>
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b
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濡?/p>
(
2)
(
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涓�銆佸涔犲紩鍏?/p>
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1
锛庡～绌?/p>
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1
锛?/p>
4
脳
9
=_______
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4
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2
锛?/p>
16
脳
25
=_______
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16
25
飩?/p>
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锛?/p>
3
锛?/p>
100
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36
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100
36
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>
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4
脳
9
_____
4
9
飩?/p>
锛?/p>
16
脳
25
_____
16
25
飩?/p>
锛?/p>
100
脳
36
________
100
36
飩?/p>
2
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锛?/p>
1
锛?/p>
2
脳
3
______
6
锛?/p>
锛?/p>
2
锛?/p>
2
脳
5
______
10
锛?/p>
锛?/p>
3
锛?/p>
5
脳
6
______
30
锛?/p>
锛?/p>
4
锛?/p>
4
脳
5
______
20
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