2022年中考数学第一轮总复习数的开方与二次根式 .pdf

《2022年中考数学第一轮总复习数的开方与二次根式 .pdf》由会员分享，可在线阅读，更多相关《2022年中考数学第一轮总复习数的开方与二次根式 .pdf（4页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、数的开方与二次根式主备人刘敖川审核人张丽丽【考点链接】1式子)0(aa叫做二次根式注意被开方数a只能是2的二次根式，叫做最简二次根式3化成最简二次根式后，被开方数几个二次根式，叫做同类二次根式4二次根式的性质：a 0；2a（a0）；2a；（4）ab（0,0 ba）；（5）ba（0,0 ba）.【典例精析】例 1（1）式子2xx有意义的x 取值范围是 _（2）已知 a 为实数，化简：31aaa例 2：下列根式中能与3合并的二次根式为（）A324.12.182BCD例 3：若 a，b 分别表示10的整数部分与小数部分，求41ba的值【中考演练】116的平方根为 _，-164的立方根为 _2使31x

2、有意义的x的取值范围是（）A13xB13xC13xD13x3（10 上海）计算：2(3)_4.若无理数a 满足不等式14a，请写出两个符合条件的无理数_.5（10 长春）计算：（1）54=_.（2）8-2（2+2）=_6下列叙述中正确的是（）A正数的平方根不可能是负数B无限小数都是无理数C实数和实数上的点一一对应D带根号的数是无理数7（10 年福州市）下列各式中属于最简二次根式的是（）A23521.12.0.5xBxxCD8（10 年恩施自治州）若422364mm与可以合并，则m 的值为（）A20511315.32688BCD9（10 海淀）下列根式中能与3合并的二次根式为（）A32B24C1

3、2D1810估算312 的值（）A在 1 和 2 之间B在 2 和 3 之间C在 3 和 4 之间D在 4 和 5 之间11若 ab-1 C.x 1 D.x-1 2函数2xy中，自变量x 的取值范围是 .3（2010绵阳）要使1213xx有意义，则x 应满足（）A21 x 3 Bx3且 x21C21x3 D21x34（2010，安徽芜湖）要使式子2aa有意义，a 的取值范围是（）Aa0B a2 且 a0Ca2 或 a0D a 2 且 a05（2010 年常州）下列运算错误的是（）A235B.236C.623D.2(2)26下列各组中的两个根式是同类二次根式的是（）A52x 和 3 x B12a

4、b 和13abCx2y 和xy2Da 和1a27下列二次根式中，是最简二次根式的是（）A8x Bx23 Cx yxD3a2b 8在27 112112中与3 是同类二次根式的个数是（）A0 B 1 C2 D3 9.（2010 年安徽）计算：263_:；312_ 10化简11xx=_ _11（2010 年无锡）9的的算术平方根是13（10 年永州)下列判断正确的是（）A2332 B 2233 C 1532 D 4355 14（2007 山东烟台）观察下列各式：11111112,23,34,.334455文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5

5、G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2

6、 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5

7、G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2

8、 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5

9、G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2

10、 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5

11、G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6请你将发现的规律用含自然数n(n1)的等式表示出来_ 在实数范围内因式分解:xx53=;15计算（1）8132182（2）2543122（3）)92913(25523xxxx（4）)622554(83（5）301(32007)(276 tan30)3（6）计算：|345tan|32)31()21(10文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M

12、1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9

13、HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M

14、1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9

15、HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M

16、1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9

17、HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6文档编码:CN5G5S7X6Q9 HA8Y4I5N1N2 ZF1A7Q8M1D6