1 . 若关于
的不等式
至少有一个负数解,则实数
的取值范围是___________
![](https://img.xkw.com/dksih/QBM/2017/1/6/1619444845977600/1619444846223360/STEM/1b8a2a6dfcfe4595aaa949311e437cea.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2017/1/6/1619444845977600/1619444846223360/STEM/5e737e2f273146ea8a3636c35df01bcd.png?resizew=89)
![](https://img.xkw.com/dksih/QBM/2017/1/6/1619444845977600/1619444846223360/STEM/f99aeb8c011c41eb8dec7339a8e71e49.png?resizew=9)
您最近一年使用:0次
名校
2 . 如图,墙上有一壁画,最高点
离地面4米,最低点
离地面2米,观察者从距离墙
米,离地面高
米的
处观赏该壁画,设观赏视角![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4814e95743f38d10aa79acb246f01548.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/bbf32b93-6155-4ba4-b275-e06a5c1c4a7f.png?resizew=173)
(1)若
问:观察者离墙多远时,视角
最大?
(2)若
当
变化时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e74ab5779d6770bb01f6c98323c72b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23da3546454b2a7c84d63ed39bb1f68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4814e95743f38d10aa79acb246f01548.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/bbf32b93-6155-4ba4-b275-e06a5c1c4a7f.png?resizew=173)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f1fb31494c616e5b7888d2c343209b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2cf11fe7b40f08c4e148d997d18a53c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
2016-12-04更新
|
1562次组卷
|
10卷引用:2016届江苏省盐城市盐阜中学高三上12月月测数学试卷
2016届江苏省盐城市盐阜中学高三上12月月测数学试卷2015-2016学年江苏省南通市如东县高二上学期期末数学试卷2019届江苏省无锡市第一中学高三下学期2月月考数学试题江苏省徐州市邳州明德实验学校2020-2021学年高二上学期10月月考数学试题四川省遂宁市遂宁中学校2022-2023学年高一下学期3月月考数学试题江苏省苏州市高新区第一中学2018届高三第一学期期初考试数学试题山西省应县第一中学2018-2019学年高一下学期期末考试数学(理)试题上海市杨浦区2018届高三上学期期中数学试题2020届江苏省南通市高三下学期4月高考模拟数学试题(已下线)第11章 解三角形(提高卷)-2020-2021学年高一数学十分钟同步课堂专练(苏教版2019必修第二册)
3 . (2015秋•盐城校级月考)已知函数
,则函数y=g(x)﹣x的零点个数是_____ .
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464571105280/1572464577159168/STEM/d6791ad6c48042d3aa6676233197a9e1.png?resizew=211)
您最近一年使用:0次