已知,点
是第一象限的点,下面四个命题:(1)点
关于
轴对称的点
的坐标是
;(2)点
到原点
的距离是
;(3)直线
不经过第三象限;(4)对于函数
,当
时,
随
的增大而减小.其中真命题是________ .(填上所有真命题的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6eca3f3312085db80a0e464ad514ab5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8df0085618e18d7bf7944e99bd0302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97421f1aeb00cca761ddd4e7fe40d000.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
20-21九年级上·湖北黄石·期末 查看更多[2]
更新时间:2021-01-21 13:57:45
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【推荐2】已知反比例函数
的图象在二、四象限,那么直线
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f81678dc6553c3121da130e81be7a18.png)
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【推荐1】函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9600dc0763c08345a846e94c6460ada6.png)
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【推荐2】若
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都在函数
的图象上,且
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________
(填“
”或“
”号).
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【推荐2】平面直角坐标系中有两个点A、B,点A的坐标为
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的长度为______ .
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【推荐1】在平面直角坐标系中,点
关于y轴的对称点为点B.连接
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的面积等于2,则点P坐标为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acf45a5f66394502b70bf1dd68ee40b.png)
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【推荐2】如图,在平面直角坐标系中,
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