1 . 实数
,
(相邻的两个3之间依次多一个0),
,
,
,
中,无理数的个数有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890d8b3521b2e04b85b49f9d9a1b1baf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1985174e05ad371e13cf24d244423da4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdefcc8672cae89e5d6b188288ebf99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5a1a7a04d4c10e7a45714482bfb58d.png)
A.2个 | B.3个 | C.4个 | D.5个 |
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3 . 一元二次方程
没有实数根,即不存在一个实数的平方等于
.若我们规定一个新数“i”,使其满足
(即方程
有一个根为i).规定:一切实数可以与新数进行四则运算,且原有运算律和运算法则仍然成立.于是有
,
,
,
,从而对于任意正整数n,我们可以得到
,同理可得
,
,
,那么
的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a11c538a2fdc64c1f118d3d0d7261b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73be79c02db553929619d957187e2077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51a11c538a2fdc64c1f118d3d0d7261b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8859b6740dc719d16e951c371db62bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73be79c02db553929619d957187e2077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1612442cdc5bb45872a4716768a4f0c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c61f31b24df69caba43e1607f5204500.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e5e52ce5bd6f6ac39c361936022515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/093e53b6bebc181f01e52a82452bbb9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e43fe8d15e134f5cbe9cab5e5ac59394.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4eb4d07ebd4f208dacfe3c9036de2ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ecac04b296cc487fd2d03bd82f536cf.png)
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4 . 通过“由特殊到一般”的方法探究下面二次根式的运算规律:特例1:
;特例2:
;特例3:
……应用发现的运算规律求
的值( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5a16f1f2200a908fe518d7fbb20db96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7c69766a0cf13f54437e0a34701892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c0bb0e761ba11eef7187f78fda88fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b82304c55e5b53f112cb7f0c9e18a98.png)
A.2024 | B.![]() | C.![]() | D.![]() |
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5 . 计算:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43bc4bfa909f3da9ea383c3bcc2c078.png)
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6 . 实数0,
,
,1.01001000,
,
中,无理数有______ 个.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598564aec706dff769c5afc4c378c572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47153fdd73c0661fa460130082e30929.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70f5389990c3a0c5373f3bd9fb2454c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efbc9a84f16a94b0ca5db78cba26b356.png)
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名校
7 . (1)计算:
.
(2)如图,在
中,
,
分别是边
和
上的点,连接
,
,且
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba60fa75a0a91f6f2a78bf99c68f7d5a.png)
(2)如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed619e2dc900c52a29012e5b821451bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d99bb3ab66b8884bf23cffe1bddcb33.png)
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真题
8 . 计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22767add00042669faa47c72b9df98f3.png)
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24-25八年级上·安徽·假期作业
9 . 已知
,
在两个相邻整数之间,则这两个整数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71884fc28d40444148b2ee5ffa6dea99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.2和3 | B.3和4 | C.4和5 | D.5和6 |
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