1 . 请同学们学习材料①若
,则
;②
.解决以下问题:
,
,当
恒成立时,
的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb9873dfaf15e799fa6fb0128433725.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b21208364124b5c477b2ff8df1c2e8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9706e3706e56caa3eb2150962f8166c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74191e4369690a6d773f8646c8b42466.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920055e97f2fff9f91d3e8b6c38835c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca51be437b1a97ca92aa1159ab71102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知
,
,对于任意
,
取
与
中较小的值,若当
时
有最大值
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b927dfb4506976cbf2ab941442be8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda7498e3766ced2ae7c9aa41693183c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c92c9763166b18e605b232a14d22a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/008e77135f850cd4beab452480a591d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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3 . 对于任意有理数x,规定:当
时,
; 当
时,
.
(1)填空:
______,
______,
______;
(2)若
, 求m 的值;
(3)若两个有理数
,
, 且a, b异号, 满足
,请直接写出a,b之间可能存在的数量关系:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f92ca3ac04a2bdc12bceee4dfc986054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c278ec775de4a238353c29359c2c4b54.png)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92682840e2a230de346562b2032f8adb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71599cd707909eb30d2a54be7f8c966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eec04ba7c52635c6af6f74d4390fb2b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31d5a0d87d64f56ffd93e463b87d6612.png)
(3)若两个有理数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6395d94d68cb6c6fdeeb6290334f0f59.png)
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4 . 在平面直角坐标系
中,对于任意两点
,
,给出如下定义将点
与
的“变倍距离”记为
,
若
,则
;
若
,则
.
例如,点
与
的“变倍距离”
.
已知点
.
(1)若点
,
,则
,
;
(2)点D在y轴负半轴上,且
,求点D的坐标;
(3)点P,Q是第一、三象限角平分线上的两个动点(P与Q不重合),若
,直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a0ded0fad43047a44e584c1aae7955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d0502a0d9c3490dcd1bcb1eab53da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c14136e345c52df3a6a5cddaee4b664.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9697efe8c08f32734b40bd94d646bbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccfb4666ee481ed179e9bfe8036644d.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e462ebf5bf2b3222369230ad4058fcb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c3e5d4a21cedd2294d1851512a1886.png)
例如,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5faa233ff3282cd8366821dd8f6fe6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac408d2739685b1dd228451ba041279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/112887099ef5a19b968cc4eaeac1ddcc.png)
已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0d1e4a02f6a99a4b838dcaf9541d7f9.png)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6938eeb65411eeac15e140cf1db99773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edd81cac5d2bcf0753819951088027d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceccc81af66fb2264102506b0aeba6ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca7e190447e549572c7753a696d4239.png)
(2)点D在y轴负半轴上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8fbc98d4478fa5a0be79e88db929fd0.png)
(3)点P,Q是第一、三象限角平分线上的两个动点(P与Q不重合),若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e706cf5ddb88a38c82138e0509d5878.png)
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5 . 如图,动点
与线段
构成
,其边长满足
,
,
.点
在
的平分线上,且
,则
的取值范围是______ ,
的面积的最大值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dab6937094b55d8810a93bcb48d93f51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df02d3ad2ded6691e340c00aa0c710f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
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6 . 已知函数
,
(1)求函数的定义域;
(2)当
时,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f81b87b03ac0944a6346df6c06cae7.png)
(1)求函数的定义域;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc0af419f4bc6f089e3304a477589d38.png)
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|
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7 . 定义关于@的一种运算:
,如
.
(1)若
,且x为正整数,求x的值.
(2)若关于x的不等式
的解和
的解相同,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b088f7ac03b687033197c2e003e73f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fdbc7ffc53e673b79491dc464d24603.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfcbe7d0ee96b70cb264e256179a8a1d.png)
(2)若关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eefa5eca87f3ee0bcbcbb6c1ffc4999.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e70cc7aa86250abccf7faf1fd9b34c2.png)
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8 .
,
为实数,若关于
的方程组
无解,则关于
的不等式
的解集为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0469362337aa01aa92dc511c9522afe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e375d71499c9a830ee03df90f4324d1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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9 . 不等式括号中部分数字和符号被墨水污染,淇淇查看到该不等式的解为
,则污染部分的内容为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . 观察下列解不等式的步骤,并回答问题:哪一步开始出错?请你完整写出解这个不等式的过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e9c490f77d275b3782ea4e7466c9e5.png)
解:
…①
…②
…③
…④
…⑤.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90e9c490f77d275b3782ea4e7466c9e5.png)
解:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ac8d3570026bd17d7f9251b246d9ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84847a5848d88068de3a49190ec5ffd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09adb4176862a94c55ea6959b5728380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25c946c6a88fedec7b7bc503c2e6c927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db2b74d89854116e411c089d053df053.png)
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