符号
表示不大于
的最大整数
,例如:
.
(1)已知
分别求两方程的解集
;
(2)求不等式
的解集:
(3)设方程
的解集为A,集合
,若
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4f5908d6a1217e493ed7586b6964dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b1b873a6d3fceb57cfbc18b2c9d406.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf4ce72cc52d37dc2424a16ee08a835.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b74d590b88111719f73712504510c8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7490886e2807c7b8a4fa57d99c4dc3a.png)
(2)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cec911af87e18edfd269dbfeb966daf.png)
(3)设方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1b23da03ffc7da8607d5ee9b8687f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30dcc0e0074f4195cb03cd0e6a1771c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95321d0e551daa25104d32157249c23d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
更新时间:2020-11-24 08:53:03
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】已知集合
,
.
(1)若
,求m的取值范围;
(2)若“x∈B”是“x∈A”的充分不必要条件,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ec5cabd60d55548ca2c12670b28e4d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4da095a91908453271054582a3a4c24.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d50619b779c1056602f46b2a95e90.png)
(2)若“x∈B”是“x∈A”的充分不必要条件,求m的取值范围.
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【推荐2】设集合
,
.
(1)若
,求集合
在
中的补集;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/549d547ddaeb31b50f3b458de935f0bf.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572939824873472/1572939830706176/STEM/414cf307eecc4fa9b01feb1fdf472fa2.png)
(1)若
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572939824873472/1572939830706176/STEM/ed03ee7aa17342e89503b0f812e2b5cb.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572939824873472/1572939830706176/STEM/2ee0f65a1b55448c9d3b95e579cc4af9.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572939824873472/1572939830706176/STEM/551c87238e62450f880910ca054debdf.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572939824873472/1572939830706176/STEM/b08318edf75c403599fa6f5c5fd70031.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572939824873472/1572939830706176/STEM/6b297679276a47af97eb96dc64483c7a.png)
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【推荐2】设条件
:实数
满足
,
.条件
:实数
满足
;
(1)求出条件
的解集.
(2)若
是
的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebff6619f0334a3494d94c6cacf2f2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf8197e4f3fd18815045d29c357a863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe5e679daf437d08a1beef17bc1d4a0.png)
(1)求出条件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
【推荐3】深圳别称“鹏城”,是中国的窗口,“深圳之光”摩天轮是中国之眼,如图(1),代表着开拓创新、包容开放的精神,向世界展示着中国自信.摩天轮的半径为6(单位:
),圆心
在水平地面上的射影点为
,摩天轮上任意一点
在水平地面上的射影点都在直线
上.水平地面上有三个观景点
、
、
,如图(2)所示.在三角形
中,
,
,
,
,
,记
(单位:
).
(1)在
中,求
的值;
(2)若摩天轮上任意一点
与
点连线与水平正方向所成的角为
如图(3)所示,点
在水平地面上的投影为
.
①用
表示
,
,
的长;
②因安全因素考虑,观景点
与摩天轮上任意一点
的之间距离不超过
(单位:
),求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e6e41ac221847824a72e964f340f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a97e6b884fb4ad12e62f77092d0e11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce0d7095ddd69d6ceaf1065b1bc2c79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a3b89ab71f1e5d0cc3ad1861b56d032.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6ec007c9c7ce7e13af3ca8b84c64ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30fbeb2f1f6ee7279885520d889bfc47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e6e41ac221847824a72e964f340f1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/8/5a42a9d1-0b41-4a8d-9e2f-6818d548ca07.png?resizew=558)
(1)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40bcf5c0ccfc3f1a40c4430246edf4c8.png)
(2)若摩天轮上任意一点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02ce6b576c4d6c9626585e5398e8496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf9f50605db5d5f8f3a01ee8e474a112.png)
①用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a9cb3d08b5dc0f02caa90b9baad4c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f31be92c8f735901f457ac405352d68c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
②因安全因素考虑,观景点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57e34f0569c29c26530dd7b394a6ec51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/167e6e41ac221847824a72e964f340f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
解题方法
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30029c810e1fbe8515a2ebb5112f8b4d.png)
(1)若
的解集为
,求
的值;
(2)若
,求不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30029c810e1fbe8515a2ebb5112f8b4d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c73a98c1b3504e09bfbe0db849b0d24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d02eceee7d8b31ccffbfcaa6fb1f1a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6acb0f1ac694dd177e99fc385f23318.png)
您最近一年使用:0次
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(0.65)
名校
【推荐2】命题
实数
满足
(其中
),命题
实数
满足
,
(1)若
,且
为真,求实数
的取值范围;
(2)若
是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a45a62af2453837041c28e79295415.png)
的充分不必要条件,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebff6619f0334a3494d94c6cacf2f2ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3da16135adddcfd5811885933fdeeef2.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c13472bf0353e16784a22e1f890fba40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ffc1bb9d53a27d484396ad74d6a26e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a45a62af2453837041c28e79295415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次