在平面直角坐标系中,已知
,
,
三个点,下列四个命题:
①若
轴,则
;
②若
轴,则
;
③若
,则
,
,
三点在同一条直线上;
④若
,三角形
的面积等于8,则点
的坐标为
.
其中真命题有______ .(填序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00289d64530b1ad38a20ba447b271635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc9afe01cf17625ddca9f3d2feae9016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ff9836ff58ed11028065b0d98b657e4.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13ecbb94ac8dfe5fbc3bffad8c9da301.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d931bce6368ba976d026f1f0984ca3d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11632bf1a6bcfc6f14a3139c39a282a7.png)
其中真命题有
更新时间:2022-06-20 10:54:37
|
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b40c2b0ab8e1cfe5112d428b4b829f.png)
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