解题方法
1 . 已知定义在
上的函数
满足:①当
时,
,②对任意
都有
,③![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
(1)求
的值.
(2)求证:对任意![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d47e83d318ddac80bd8dc029ee2deb.png)
(3)证明:
在
上是增函数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d752d8db8a05b3ec7312f6ac8b64a07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3c7d9a147725bd2ee363e3364b97b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9dbe6c97e2ffd3d4dcd75d138fd95f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d55ef0d1b7ea88d92fd6e1ecebb5f5.png)
(2)求证:对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72d47e83d318ddac80bd8dc029ee2deb.png)
(3)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.png)
您最近一年使用:0次
名校
解题方法
2 . 如图,正方形ABCD和菱形ACEF所在平面互相垂直,
.四棱锥
的体积是
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/c6705ee4-da66-4003-9fc9-4f14ad53ee46.png?resizew=157)
(1)求证:
平面ABF;
(2)求AB的长度及四面体ABEF的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c1f4d1a70ef462f51f6d0c2db5fa6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80c753cb1eb73fd8d136d00462970797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e38f2b35473fa9afa57f66550e3f6d5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/18/c6705ee4-da66-4003-9fc9-4f14ad53ee46.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
(2)求AB的长度及四面体ABEF的体积.
您最近一年使用:0次
名校
3 . 如图,在平行六面体
中,
,
,
,
,点
为
中点.
平面
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cead0e8eadfdcefa334953e88864f424.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2b377f22aafd3742ad860f77abaacef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f7be9e552514a07e7f745666cb5b76b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b24a6fd9b4574e7808eafc57f8496.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d22391e2f16997bb4b99041f8543b2ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a52848aff08399a36f217356007a4b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/104bf24922707215be95a860cd533940.png)
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2024-03-12更新
|
2934次组卷
|
9卷引用:江苏省常州市第一中学2024届高三下学期期初检测数学试题
江苏省常州市第一中学2024届高三下学期期初检测数学试题辽宁省沈阳市五校联考2024届高三上学期期末数学试题(已下线)每日一题 第16题 不易建系 先证垂直(高三)(已下线)【一题多解】立体几何 新旧呼应湖南省长沙市雅礼中学2024届高三一模数学试卷江西省宜春市丰城市第九中学2024届高三上学期期末考试数学试题(已下线)专题04 立体几何辽宁省辽东十一所重点高中联合教研体2024届高三下学期高考适应性考试(一)数学试题(已下线)湖南省长沙市四县区2024届高三下学期3月调研考试数学试题变式题11-15
名校
解题方法
4 . 已知结论:椭圆
上一点
处切线方程为
.试用此结论解答下列问题.如图,已知椭圆
:
的右焦点为
,原点为
,椭圆的动弦AB过焦点
且不垂直于坐标轴,弦
的中点为
,椭圆
在点A,B处的两切线的交点为
.
(1)试判断:O,M,N三点是否共线若三点共线,请给出证明;若三点不共线,请说明理由;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7aea48c44781a844b5c19191f70f61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a271c22e34d4df61636ab3052a8e0ecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1185a977aa9dc61d23db4b658126f8a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa77802f9a072a800ee5098f668d5d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/19/b9703fbb-7e2a-404b-bdfe-c1c16369ef43.png?resizew=161)
(1)试判断:O,M,N三点是否共线若三点共线,请给出证明;若三点不共线,请说明理由;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfba099195b252ab0faba0d8360fae98.png)
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名校
解题方法
5 . 在锐角△ABC中,角A,B,C对边分别为a,b,c,设向量
,
,且
.
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cb21ae875f36d52d0b6f82b0201d0e.png)
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b320fd93c543ccf36310502b7b3a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc0018cd131352c839e574a16b5eca6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4d070c5939bb0ec4a9d40d7e3c7d3f.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cb21ae875f36d52d0b6f82b0201d0e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14b6de5b4ffa89779869664e41beff55.png)
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2023-08-07更新
|
854次组卷
|
5卷引用:江苏省常州市第一中学2023-2024学年高二上学期期初数学试题
江苏省常州市第一中学2023-2024学年高二上学期期初数学试题辽宁省沈阳市第二中学2022-2023学年高一下学期期中考试数学试题河南省焦作市博爱县第一中学2023-2024学年高三上学期期中数学试题(已下线)6.4.3余弦定理、正弦定理(第3课时)(已下线)重难点08 正、余弦定理解三角形的重要模型和综合应用【八大题型】
6 . 某校为了增强学生的安全意识,组织学生参加安全知识答题竞赛,每位参赛学生可答题若干次,答题赋分方法如下:第一次答题,答对得2分,答错得1分;从第二次答题开始,答对则获得上一次答题得分的两倍,答错得1分.学生甲参加这次答题竞赛,每次答对的概率为
,且每次答题结果互不影响.
(1)求学生甲前三次答题得分之和为4分的概率;
(2)设学生甲第
次答题所得分数
的数学期望为
.
(ⅰ)求
,
,
;
(ⅱ)直接写出
与
满足的等量关系式(不必证明);
(ⅲ)根据(ⅱ)的等量关系求
表达式,并求满足
的
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
(1)求学生甲前三次答题得分之和为4分的概率;
(2)设学生甲第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcc33772a68d3e249aab039ab0d3f572.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c671e8081b5cc433138e87d5fddd9.png)
(ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/160d542c7254eb199f89cb76bdc726b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa7344b7def45826d3ff5939282bbb33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6468912b3e325881b3caf2d52f030631.png)
(ⅱ)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c671e8081b5cc433138e87d5fddd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00418e8aa72578005947d34081715b8b.png)
(ⅲ)根据(ⅱ)的等量关系求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c671e8081b5cc433138e87d5fddd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4093d359dfe5f6a23e852773af246561.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
您最近一年使用:0次
名校
解题方法
7 . 四棱锥
中,四边形
为梯形,其中
,
,
,平面
平面
.
(1)证明:
;
(2)若
,且三棱锥
的体积为
,点
满足
,求平面
与平面
所成的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d31600cba2d5256c7e78b6122d6755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec2d5ab801f2a84b78139b0ea2c5032b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ec435aa1401dbce7863b531bf2f3e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/11/e84549dd-aee9-4098-9ad0-fc7b6287c228.png?resizew=157)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9104a1941e557a85fd1496bc2b9be297.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08a9ec3b527947cad9caa4537e0cb7e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e70b3a2b50632e4441045cd65b94ffd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac93e58e9bba899df62a4cda5f1a5ca2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2023-09-10更新
|
977次组卷
|
3卷引用:江苏省常州高级中学2024届高三上学期期初检测数学试题
名校
8 . 已知函数
,
.
(1)求函数
的定义域,判断并证明该函数的单调性;
(2)函数
,若对
,都
,使得
成立,求实数
的取值范围;
(3)函数
,若对
,都存在
,使得
成立,求实数
的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99eaeb2ab68a49074d623ffca072fed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6da4dca84cba2b9ba42de0a54fd3dde4.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc6570333ab37b35226ab3574f9bba6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0bb7bb34b5f4d32fc07b47752fa171d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1276f06af99b4602c0f99ece9c97697c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a86b821f593ab9d43f1f67ffb160c4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066e246ae8bffb3e409faed863a40af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0bb7bb34b5f4d32fc07b47752fa171d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914bdb6c1d82b8982f219a72d470e47a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d968b1d9e98342bf10b32b29dc52fd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
名校
9 . 已知函数
,
.
(1)当
时,求
的最大值;
(2)当
时,试证明
存在零点(记为
),
存在极小值点(记为
),并比较
与
的大小关系.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e680ba07e119aaa01870aa22145f3d14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90efe5472babab1da6415194af8c2ecc.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22a4a0dd7307a1323d25331e60782d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d33da711e50e96568facb18cef27165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
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解题方法
10 . 已知点
在椭圆
上,
的长轴长为
,直线
与
交于
两点,直线
的斜率之积为
.
(1)求证:
为定值;
(2)若直线
与
轴交于点
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5de78b493bc2cc9696c584325c22ee7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad523e69a1bf925e73a22900b9855df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fc5bd66dd6d5e09ff0893a938aed56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af1669a89087600d4bdce98f21036b22.png)
您最近一年使用:0次