下列四个数,属于无理数的是( )
A.sin30° | B.π0 | C.![]() | D.![]() |
更新时间:2020-09-02 13:57:11
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【推荐1】下列各数:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91b80acec20948e9593d41982345e10.png)
(每相邻两个2之间依次多一个0),无理数有( )个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f91b80acec20948e9593d41982345e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e23090a7d1b3c131556016ebb63994b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】下列实数中:2π,
,
,
,0,
,
,
,20%,3.1010010001…(每两个1之间逐次增加1个0)中,无理数的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f3fae1304b36c0aa24d98d4ae0508b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0212732f733e20e61b4ece6d4ed18c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9882ad48ba6872b185ad2500f03fbc04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/481b2b151bf00b6c1728b9e163132066.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41914217cd8ad1d43cc8d4bde6cf816.png)
A.3 | B.4 | C.5 | D.6 |
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【推荐2】在下列这四个数中,最大的数是( )
A.![]() | B.![]() | C.﹣20 | D.﹣3﹣2 |
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【推荐2】已知实数在数轴上的对应点位置如图所示;则化简
的结果为( )
A.1 | B.![]() | C.![]() | D.![]() |
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【推荐1】在平面直角坐标系中,已知点
、
,点
是线段
的中点,将
绕点
逆时针旋转
,记点
的对应点为点
,则点
的坐标是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b62194097ac66a5093c57fca2f5b4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/448c0a5ee776d19ce8e42ac9a5fd27c4.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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