1 . 当a>0时,
等于________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/120b237be8f1d4367c07c3896fa3bfb0.png)
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2022高三·全国·专题练习
2 . Which number of that number 5 is the cubic root of ?( )
A.3 | B.5 | C.25 | D.125 |
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2022高一·全国·专题练习
3 . 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)
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4 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1798f930081376a23705fae781916ed.png)
________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd816362f367ef750318ce82cb131f28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1798f930081376a23705fae781916ed.png)
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5 . 如果__________ ,那么
叫做
的
次方根.其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70469e98fac97c6ee6232983901b53fb.png)
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21-22高一·湖南·课后作业
6 . 求下列各式的值(式中字母都是正数):
(1)
;
(2)
;
(3)
;
(4)
;
(5)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea0618e42a763834f874a4d9976ab332.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54300b27e8d607bda52aba4431aeeada.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4b1fb9ae61ef4a4554d00c915dbc3a.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633a1698fecbd5f14b00afc6f217526e.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0f46d35ec13543eeb8dabfcf4981543.png)
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21-22高一·全国·课后作业
7 . 判断正误.
(1)任意实数的奇次方根只有1个.( )
(2)正数的偶次方根有两个且互为相反数.( )
(3)
.( )
(1)任意实数的奇次方根只有1个.
(2)正数的偶次方根有两个且互为相反数.
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fff1031d5e9a532107af4325f005926a.png)
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21-22高一·全国·课后作业
8 . (1)n次方根
(2)根式
①定义:式子___________ 叫做根式,这里n叫做___________ a叫做___________ .
②性质:(
,且
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef16a2ed8d912a31142f35435bda914.png)
___________ ;
定义 | 一般地,如果 | |||
个数 | n是奇数 | x仅有一个值,记为 | ||
n是偶数 | x有两个值,且互为相反数,记为 | |||
x不存在 |
①定义:式子
②性质:(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10e468312d09c6563c9094b710a35a65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97769855336d73371930df1f187875e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef16a2ed8d912a31142f35435bda914.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1e231184a0350857001cc1f72c3214f.png)
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9 . 求证:
(其中
,
,
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1887144c0bc98fbb989652ab04ddc67e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34e061014cb3ef33150abd23add30b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8f3bb0d4f501deb1f5f5d7eeba393b5.png)
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10 . 若
,
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b39d0a37105d07bf766b194d667f06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a27ec14a9fa2a5d49a16c282344d75.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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