1 . 设函数
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/069751d0-d183-4db6-bda1-d936ef131f93.png?resizew=170)
(1)在平面直角坐标系中画出它的图象;
(2)解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24438824d475f58a8ddcc0e05b599468.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/3/069751d0-d183-4db6-bda1-d936ef131f93.png?resizew=170)
(1)在平面直角坐标系中画出它的图象;
(2)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0dd18467feea8eb478f4669a32c2d57.png)
您最近一年使用:0次
2 . 画出下列函数的图象,并分别确定使
的实数x的取值范围:
(1)
;
(2)
;
(3)
;
(4)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f19f38dde02c79ced528a94826b4072.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81d71edb9d332f150215443b79e40831.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/688211ed30ce54c12efcfd8df0cf7706.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c075299c92df872b42f62746f2e77d9b.png)
您最近一年使用:0次
2023-10-07更新
|
89次组卷
|
3卷引用:北师大版(2019)必修第一册课本习题第一章4.2 一元二次不等式及其解法
名校
3 . 已知函数
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/4834499c-f14b-4ab8-9f60-237801198ce1.png?resizew=187)
(1)请在给定的坐标系中画出此函数的图像,并根据图像说出函数的值域及单调增区间;
(2)若
,求x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fcea4aeabfae2fe6a482f96994427c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/23/4834499c-f14b-4ab8-9f60-237801198ce1.png?resizew=187)
(1)请在给定的坐标系中画出此函数的图像,并根据图像说出函数的值域及单调增区间;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bd767776ecc1b1c5bc97afa0ab466cd.png)
您最近一年使用:0次
2022-10-20更新
|
471次组卷
|
3卷引用:3.函数的单调性和最值(分层练习,七大题型)-高一数学同步精品课堂(北师大版2019必修第一册)
(已下线)3.函数的单调性和最值(分层练习,七大题型)-高一数学同步精品课堂(北师大版2019必修第一册)福建省连城县第一中学2022-2023学年高一上学期第一次月考数学试题福建省莆田锦江中学2022-2023学年高一上学期期中数学试题
名校
4 . 已知函数
.
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897032896274432/2945830704455680/STEM/543c5762add34f10ada4548e24ba8109.png?resizew=226)
(1)画出函数
的图像并写出它的值域;
(2)若
,求x的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061284b68e4e5b0154ce4bb7fd3602fb.png)
![](https://img.xkw.com/dksih/QBM/2022/1/18/2897032896274432/2945830704455680/STEM/543c5762add34f10ada4548e24ba8109.png?resizew=226)
(1)画出函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03f300317aa56697cf09a033235900de.png)
您最近一年使用:0次
解题方法
5 . (1)解不等式
;
(2)对于题目:已知
,
,且
,求
最小值.
同学甲的解法:因为
,
,所以
,
,从而:
.
所以
的最小值为8.
同学乙的解法:因为
,
,
所以
.
所以
的最小值为
.
①请对两位同学的解法正确性作出评价;
②为巩固学习效果,老师布置了另外一道题,请你解决:
已知
,
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75cc5360e0e54cde5e73ffbea959790.png)
(2)对于题目:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73552080b72be89317eb60e9bef76c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27a0d4c12a65a54c29f1ef8e2601d29d.png)
同学甲的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4251548d5b6df7d28599be1002f02ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba107edb7565f1f294137d2b70548ce3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5acc0d2031d4d6ede3838732b4b90fbf.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
同学乙的解法:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ff78ba3e74c1fa1f1abdb83969c3277.png)
所以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec978eb43bc4f9e7df83b0d0195dcda.png)
①请对两位同学的解法正确性作出评价;
②为巩固学习效果,老师布置了另外一道题,请你解决:
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def2a209038816cc74a1bafb8f390598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/add21924d10481916191cad9cde56b50.png)
您最近一年使用:0次
6 . 设
和
,则函数
.
(1)用分段函数的形式表示该函数
;
(2)画出该函数的图象;
(3)写出该函数的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a4220bf78b2f8de69219c5f826a9ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/215317137927881513572bcd94a660ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76cb2dd023553e6609c47202fe30c479.png)
(1)用分段函数的形式表示该函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531bcdb6324cb5a759301daddf9768c0.png)
(2)画出该函数的图象;
(3)写出该函数的值域.
您最近一年使用:0次
7 . 求函数
的零点,并画出函数的图象.解不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3c8f31ac48733eada5e603d8b040e95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54236146c512788e40eaafb5d17d29bf.png)
您最近一年使用:0次