1 . 已知点
关于x轴的对称点
在反比例函数
的图象上,则实数k的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e648aa381d4c1ee6639536b0b1510a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
A.3 | B.![]() | C.![]() | D.![]() |
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2 . 计算
的结果是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc39c4fef43aa6dde6559cf8168fbc34.png)
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3 . 在
,
,0,1这四个数中,最小的数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
A.![]() | B.![]() | C.0 | D.1 |
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4 . 如图,在正方形ABCD中,点E,F将对角线AC三等分,且
,点P在正方形的边上,则满足
的点P的个数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/b4a0d7e0-12c4-4608-8e53-6a741b640d43.png?resizew=135)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0763b031b7e6b6d87ce3554ac482d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cd31c9b84ea16179bf96d41573f6771.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/23/b4a0d7e0-12c4-4608-8e53-6a741b640d43.png?resizew=135)
A.0 | B.4 | C.6 | D.8 |
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5 . 2019年“五一”假日期间,我省银联网络交易总金额接近161亿元,其中161亿用科学记数法表示为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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6 . 如图,AB是半圆O的直径,C,D是半圆O上不同于A,B的两点,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
,AC与BD相交于点F.BE是半圆O所在圆的切线,与AC的延长线相交于点E.
![](https://img.xkw.com/dksih/QBM/2021/11/1/2841913635938304/2848218157375488/STEM/ceb65bfd84284424a99ff9af05814877.png?resizew=162)
(1)求证:
;
(2)若
,求证:AC平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d2530e7023b2345c651e8f53629ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1b0a6ae241cd8cf208e71fa807c16f.png)
![](https://img.xkw.com/dksih/QBM/2021/11/1/2841913635938304/2848218157375488/STEM/ceb65bfd84284424a99ff9af05814877.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ed63543f0d383e6e33599e1fc0a3413.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d96a5d40d0aea9f4398ca4d0fe9b0dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4189a0821a0ffab9dc171ecd279ba442.png)
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