1 . 在
,
,
,0,
,0.8中,无理数个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0e4870ebb4733aae11c47b68e02a89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35e2d7c958e99bcd9d7f251c19ee3544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b1625d21fa2fb85cf8c02d8e99f175.png)
A.1个 | B.2个 | C.3个 | D.4个 |
您最近一年使用:0次
2 . 实数
,
,
,
,
,
(相邻两个
之间依次多一个
),
其中无理数有( )个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8397629ac2094389cd991491413535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b68e594212cf2a24501a758adfcae885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39f3fae1304b36c0aa24d98d4ae0508b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0374a8f9f204a6ed317c65c820592cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b12efb03327f461e868b2ea433f9b0.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
3 . 下列各数是无理数的是( )
A.![]() | B.3.14 | C.![]() | D.![]() |
您最近一年使用:0次
名校
4 . 在
、
、
、
、
这五个数中,无理数有( )个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/292b791c7cf21c172e6e7f97f04be176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2d1ecae9c649cc3c89f9ce0c063208.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/088d0fa32f409b82481f066b40e92c07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8deb3ffecd13e87e074f6c1ba562b873.png)
A.1 | B.2 | C.3 | D.4 |
您最近一年使用:0次
名校
5 . 下列各数中,属于无理数是( )
A.![]() | B.0.101 | C.![]() | D.![]() |
您最近一年使用:0次
6 . 在实数
中,无理数的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347ae70e72f21d2aa8e1f59d3fefefee.png)
A.0个 | B.1个 | C.2个 | D.3个 |
您最近一年使用:0次
7 . 以下实数中,是无理数的是( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-07-30更新
|
103次组卷
|
3卷引用:广东省深圳市福田教育科学研究院附属中学2020—2021学年八年级上学期期中数学试题
8 . 下列各数:
,
,
,
,
,
,0.585885888588885…(相邻两个5 之间8的个数逐次加1)中,无理数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8397629ac2094389cd991491413535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/175dba2a2a7bd29c2dd4fcce37a0912d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64b4088b0bb1c211852fd1ecf3d667dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598564aec706dff769c5afc4c378c572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
A.2个 | B.3个 | C.4个 | D.5个 |
您最近一年使用:0次
9 . 下列说法正确的是( )
A.带根号的数都是无理数 | B.实数分为正实数和负实数 |
C.无限小数是无理数 | D.数轴上的点和实数是一一对应的 |
您最近一年使用:0次
名校
10 . 如图,设四边形
是边长为1的正方形,以正方形
的对角线
为边作第二个正方形
,再以第二个正方形的对角线
为边作第三个正方形
,如此下去…
(1)记正方形
的边长为
,依上述方法所作的正方形的边长依次为
,
,求出
的值.
(2)根据以上规律写出第n个正方形的边长
的表达式.并求出
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4b93d7abcfc4c3df48f03aa969c17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344164942bd5946e83cbdf1ceb98c676.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/31/0a685b00-4a0d-4cbc-b159-e90e66a4c56c.png?resizew=205)
(1)记正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85657c19197a20a41d4c1d5f17ca3a59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d7171905c935da184ff5c7697bc8dd.png)
(2)根据以上规律写出第n个正方形的边长
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaec3004937aab88c44e66753caab782.png)
您最近一年使用:0次