解题方法
1 . 已知正
的顶点A在平面
内,点
,
均在平面
外(位于平面
的同侧),且在平面
上的射影分别为
,
,
,设
的中点为
,则直线
与平面
所成角的正弦值的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66c2406b64075988c6b899219eca72e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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2 . 已知向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ec0e214334b0b2ce55284ad530c9b08.png)
(1)当
时,求
的值
(2)当
时,方程
有解,求实数
的取值范围;
(3)当
时,
恒成立,求正数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ec0e214334b0b2ce55284ad530c9b08.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a232ab8d7fc986e7714ad5c4340602d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed33229aea12f44f7dd64fd14882b7ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29aaaffbe5e449ccddde705fabedf8e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b89b139ebfb1de8b89ca1e0b77c2ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3436e6560f9057b23b39b2193236d15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
解题方法
3 . 在
中,角
的对边分别为
,且
为正数,
,
为
边上的中线,
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e30c0a5c92f50dce1f7624709950ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ec18aa8ab6f4a4e70722e4df77c9c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ec18aa8ab6f4a4e70722e4df77c9c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/094c8c810a1dabe66368d7e0e20b12d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467b28c18aa1965fbf1776287760f8b0.png)
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2023-05-20更新
|
886次组卷
|
2卷引用:上海师范大学附属中学2022-2023学年高一下学期期中数学试题
名校
4 . 如图1,某景区是一个以C为圆心,半径为3km的圆形区域,道路
,
成60°角,且均和景区边界相切,现要修一条与景区相切的观光木栈道AB,点A,B分别在
和
上,修建的木栈道AB与道路
,
围成三角地块OAB.(注:圆的切线长性质:圆外一点引圆的两条切线长相等).
(1)当
为正三角形时求修建的木栈道AB与道路
,
围成的三角地块OAB面积;
(2)若
的面积
,求木栈道AB长;
(3)如图2,设
,
①将木栈道AB的长度表示为
的函数,并指定定义域;
②求木栈道AB的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/25/235c5453-4f21-4741-9c75-454c464c34cc.png?resizew=336)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2df1d745380af6b8305bfd345b2f455.png)
(3)如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414ef209e6ce6428bd358eafd74ddaa1.png)
①将木栈道AB的长度表示为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②求木栈道AB的最小值.
您最近一年使用:0次
2023-05-20更新
|
1101次组卷
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6卷引用:上海市奉贤中学2024届高三上学期10月月考数学试题
上海市奉贤中学2024届高三上学期10月月考数学试题福建省厦门第一中学2022-2023学年高一下学期期中考试数学试题(已下线)高一数学下学期期末模拟试题02(平面向量、解三角形、复数、立体几何、概率统计)-【同步题型讲义】(已下线)模块二 专题2 《平面向量》单元检测篇 B提升卷 (北师大版)(已下线)模块二 《平面向量》单元检测篇 B提升卷(人教A)(已下线)模块二 专题3《解三角形》单元检测篇 B提升卷 (苏教版)
名校
解题方法
5 . 已知抛物线
的焦点为
,过点
的直线与
交于
、
两点,
在
处的切线与
的准线交于
点,连接
.若
,则
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1584d07b1e2ddc64349f0f5940f3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad24a14d86f127f941db3c3500ef33ac.png)
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2023-05-18更新
|
1259次组卷
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8卷引用:2.4.2 抛物线的性质(九大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
(已下线)2.4.2 抛物线的性质(九大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)湖北省武汉市武昌区2023届高三下学期5月质量检测数学试题四川省泸州市泸县泸县第五中学2022-2023学年高二下学期期末数学理科试题四川省泸州市泸县第五中学2022-2023学年高二下学期期末文科数学试题(已下线)专题04 不等式与不等关系(解不等式、基本不等式、线性规划、比较大小)(已下线)考点20 常用的二级结论的应用 2024届高考数学考点总动员【练】(已下线)大招24阿基米德三角形(已下线)第20题 抛物线焦点弦、切线方程问题(压轴小题)
名校
6 . 已知对任意正数a、b、c,当
时,都有
成立,则实数m的取值范围是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/751e274e9107d780c39ba9c49d6daefb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77e3b60eb4b27372b5fa453b7a0f2082.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-05-05更新
|
1205次组卷
|
4卷引用:上海交通大学附属中学2022-2023学年高一下学期期中数学试题
上海交通大学附属中学2022-2023学年高一下学期期中数学试题重庆市缙云教育联盟2023届高三第三次诊断性检测数学试题(已下线)专题10 指数及指数函数压轴题-【常考压轴题】(已下线)专题03 一网打尽指对幂等函数值比较大小问题 (9大核心考点)(讲义)
名校
解题方法
7 . 点
是椭圆
上的动点且点P不在坐标轴上,称动点
构成的轨迹为曲线
.若圆
与曲线
无公共点,则实数r的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82aaa597a5aa6176863eda3fdf83e181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2db3534aaf21bbc27448be9ee90a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfda01138e6901ca3f5a9e0b330fe2c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1410414ebd007a6aebfb75240e2b458f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bcd8ee2d8367c167d6ae0abc741b6b8.png)
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2023-04-13更新
|
716次组卷
|
3卷引用:上海市控江中学2022-2023学年高二下学期3月月考数学试题
名校
解题方法
8 . 已知函数
(
,
)至多有一个零点,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18096800e05cf16e31b69dcef7fc647a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686b332872c51b433befe65fbe773380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d11970314471017a0e8b59255eaa0ba.png)
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2023-03-11更新
|
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6卷引用:上海市徐汇区2022-2023学年高一上学期期末数学试题
上海市徐汇区2022-2023学年高一上学期期末数学试题(已下线)专题15函数的应用-【倍速学习法】(沪教版2020必修第一册)(已下线)第98练 计算速度训练18湖南省长沙市长郡梅溪湖中学2022-2023学年高二下学期期中数学试题(已下线)专题03 均值不等式及其应用 (2)(已下线)上海市四校(复兴高级中学、松江二中、奉贤中学、金山中学)2024届高三下学期3月联考数学试题变式题11-16
名校
解题方法
9 . 设实数
,若满足
,则称
比
更接近
.
(1)设
比
更接近0,求
的取值范围;
(2)判断“
”是“
比
更接近
”的什么条件?并说明理由;
(3)设
且
,
,试判断
与
哪一个更接近
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b08899338c9f2c44ebdef85362464982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d3c002f2624d5e8ec59766c609fb74a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1d2e5599453f8d4c04369bc8f79962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b5a9de8a72dda70e3eefeb0a408ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)判断“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/473c6d2b6c01a2490e4bb1cf2dad9edc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbd10df05a8853f42c84c11129f6e2e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ea5e8fdf104e1cc8348c13a3cd1610.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
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名校
解题方法
10 . 若
,且
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9157580973e78e7fc38f7cb4cceb88f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/092ad22973177875aa4bbb5bcedcd2f5.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-02-10更新
|
838次组卷
|
4卷引用:上海市南洋模范中学2023-2024学年高一上学期期中数学试题