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鎽樿锛?/p>
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鏁板涓紝
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缁撴灉锛?/p>
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渚?/p>
鑻?/p>
a
锛?/p>
b
涓洪潪闆跺疄鏁帮紝浠ｆ暟寮?/p>
a
a
b
b
ab
ab
|
|
|
|
|
|
飥?/p>
飥?
鐨勬墍鏈夊彲鑳界殑鍊兼湁锛?/p>
锛?/p>
A
2
涓?/p>
B
3
涓?/p>
C
4
涓?/p>
D
鏃犳暟涓?/p>
瑙ｆ瀽锛?/p>
鏍规嵁棰樻剰锛屾寜
a
锛?/p>
b
鐨勭鍙凤紝鍒?/p>
4
绉嶆儏鍐佃璁猴紱姣忕鎯呭喌涓嬶紝鍒╃敤缁濆鍊?/p>
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瑙ｏ細
鏍规嵁棰樻剰锛屾寜
a
锛?/p>
b
鐨勭鍙凤紝鍒?/p>
4
绉嶆儏鍐佃璁猴細
鈶?/p>
a>0
锛?/p>
b>0
鏃讹紝鍘熷紡
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a
a
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b
b
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ab
ab
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锛?/p>
1
锛?/p>
1=3
鈶?/p>
a>0
锛?/p>
b<0
鏃讹紝鍘熷紡
=
a
a
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b
b
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ab
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锛?/p>
1
锛?/p>
1=
锛?/p>
1
鈶?/p>
a<0
锛?/p>
b>0
鏃讹紝鍘熷紡
=
a
a
+
b
b
+
ab
ab
=
-
1
锛?/p>
1
锛?/p>
1=
锛?/p>
1