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1 . 如图,等边
的周长为
,
是边
上的中线,
是
延长线上一点,且
,则
的周长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/f782e3da-9a66-43fc-b08e-d1d2197db1d4.png?resizew=174)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8da45c443af7994a26ffa9d8894e7262.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55b6ce55e67f6e95e616eaf1ca3f6f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/21/f782e3da-9a66-43fc-b08e-d1d2197db1d4.png?resizew=174)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 在同一坐标系中一次函数
和二次函数
的图像可能为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e136e7637543c8ae92c8dcd55b31924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be61cd85ec86aabd164cae0265246b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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14-15高一上·广东揭阳·阶段练习
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3 . 下列各式能用完全平方公式进行分解因式的是
A.x2+1 | B.x2+2x﹣1 | C.x2+x+1 | D.x2+4x+4 |
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