阅读材料,解决问题:
化简:
.由于题目没有给出x的取值范围,所以要分类讨论,
.
令
,
,令
,得
;
∴
的零点值为3,
的零点值为
,在数轴上标出3和
的点,数轴被分成三段,即
,
,
;
当
时,原式
;当
时,原式=5;当
时,原式
.
(1)求
和
的零点值;
(2)化简:
.
(3)求方程:
的整数解.
化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f95122b68abd7578ff3e60238c0feb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/489a091c06b675148d0015227f2c3f93.png)
令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815650356afb1f42207c27d3b11635f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed919c5b87f48f117bcddee8783f6f06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e4ea86b3df4b6281972e2e5cde1217.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75987111de1e3f6d3c52b0750b72d4c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eeb69dcd17cd8448b0ed90fc02a7f3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c884ac7d312e853b2ed2de4f5a647c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee18d7a40f7a7e0dc85b1bd75bf750c.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eeb69dcd17cd8448b0ed90fc02a7f3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5a7a7321d8180ca448450667428754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4c884ac7d312e853b2ed2de4f5a647c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ee18d7a40f7a7e0dc85b1bd75bf750c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec1ad7401557bb6012a8ed451c066eba.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa9fba7b0a4fbc939b4cd107a1f8a760.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c2c6d0bfb116475084f22e985420ea.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ef938e322b3c331706b6c58db2a8a1c.png)
(3)求方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c04898f12cda3817ca11ee2aea4a0fe3.png)
更新时间:2022-08-16 11:58:31
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【推荐3】已知数轴上的两点A,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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名校
【推荐1】有这样一类题目:化简
,如果你能找到两个数m、n,使
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,那么将
变成
开方,从而将
化简.例如:化简![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f52a49827b10ed69c411a4fc24b7ea.png)
因为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c91c97ad43e70f86982b36990ee46c.png)
所以![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beea2a7f373f1d5a42c675feae01aa27.png)
仿照上例化简下列各式
(1)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79302e44ec001a6f493b466325e0e5aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e30fe2547f71f7505e99a0dd7188e81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/562c62e0442121011d12f10234b95119.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79302e44ec001a6f493b466325e0e5aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f52a49827b10ed69c411a4fc24b7ea.png)
因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c91c97ad43e70f86982b36990ee46c.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beea2a7f373f1d5a42c675feae01aa27.png)
仿照上例化简下列各式
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9061196452732ac0f22363f115d2f74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb4573ef4ddc59cca83ac7a61023efd.png)
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解答题-计算题
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【推荐2】已知
.
(1)若
,计算M的值;
(2)若M的值为整数,求正整数a的最小值.
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(1)若
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(2)若M的值为整数,求正整数a的最小值.
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