名校
解题方法
1 . 如图,在四棱锥
中,底面
是直角梯形,点
为
中点,
,平面
平面
.
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求证:平面
平面
;
(3)若
与平面
所成的角为
,求平面
与平面
所成角的正弦值.
![](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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7091ee7839d34c899c879de3b98795.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba8f7af0e091e082100c3cd7f8c487f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
您最近一年使用:0次
2 . 如图所示数阵,第
行共有
个数,第
行的第1个数为
,第2个数为
,第
个数为
.规定:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c97394c9634fde6e772872b54b6249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f195253d3a2bc6383233e3515903c5b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0991d363c974fad83457c6a78b0152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ce15fa76fda687b1c1fbdc2480c524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497e4a4975dd419a1c65724385950c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34607bb95c84c3bd775c144255895f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
(1)试判断每一行的最后两个数的大小关系,并证明你的结论;
(2)求证:每一行的所在数之和等于下一行的最后一个数;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c15166e2227c8c8582bc17f818fa43d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0623207595425920f16e76a7f8f268b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29a285201fd7e0ad70fa7431cb89a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0749c4129afc0c704155f522290b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8715a3f984d2627afd7c40c61347b7cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5222268dda9dcb9b660f3cbedbb37757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f1e3925bda80e8223bf7e431585847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b344ab26012e4cc663266f04dd700cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86c97394c9634fde6e772872b54b6249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ce266899f72edea3187f4857b802ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99d3bec9b8bdeca73764d9d2eb2c0a15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f195253d3a2bc6383233e3515903c5b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89299ff7b560424509825ce7c690c5be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcad334979e1fa0bef47d84c3c3c101a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20fc7959cf1daf71f15861bc4704b111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0991d363c974fad83457c6a78b0152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db1e5ed0e2b01da100e896189c6312d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81ee0101530cdc106c05caca4b7014ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c68792cc182e16074dfeaa1bbc7e166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d405be4f523f33ffc67f0d67c129cb7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2ce15fa76fda687b1c1fbdc2480c524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9851d400de384cb46bbefdbfc8cdd3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f159ced7d6594cc3d4f7a88fd9bc4cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332ab3261e4e33b0948263ba058dc147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08d450cef132b9dec887ecd711de4603.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a71f2064dc04af9382d1ef31feb0d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/497e4a4975dd419a1c65724385950c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/785606cbba01206e9d91cb3e6d4d2ab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e40e77f739724cbfb3bdfd17ba44e238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6df9830c93a2b4e7350544ffd662b82d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6585c61fd9ef5eaa86493b7c65ef581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace8be106f1402565ea778f0818bda9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb5c42bd7166ff6486b3b69ba1e1d64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d34607bb95c84c3bd775c144255895f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
(1)试判断每一行的最后两个数的大小关系,并证明你的结论;
(2)求证:每一行的所在数之和等于下一行的最后一个数;
您最近一年使用:0次
3 . 已知抛物线
,焦点为
,点
在
上,直线
∶![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
与
相交于
两点,过
分别向
的准线
作垂线,垂足分别为
.
(1)设
的面积分别为
,求证:
;
(2)若直线
,
分别与
相交于
,试证明以
为直径的圆过定点
,并求出点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d939b804513036cd96fddce791ece09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24dba5cc987db7f50f9b8e2d4544006d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936c47254c94f202e1c97ccb07d943ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8454989732716850cb57ca15f8ef596.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/613b2b516b04a9a06db7526f5b4d7a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf4e20ea341827ce5f9552daee39462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc7ded76162a594e556495aa0a56d54f.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
名校
解题方法
4 . 已知定义在
上的函数
满足
,且当
时,
.
(1)求
的值,并证明
为奇函数;
(2)求证
在
上是增函数;
(3)若
,解关于
的不等式
.
![](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/dbc2ae509aed37fd2e2c8faa640ab231.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1c3f4162ae5563b2c9737d0979b1926.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e38fffbc7ab9882480f4faa72390e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39d43e46dba47f1543056c1e376e16ab.png)
(2)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/933093b52cca887f597cbe22a5467b11.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9521a6482b63d10996088eec2c7f1083.png)
您最近一年使用:0次
2023-10-12更新
|
2008次组卷
|
4卷引用:山东省滨州市新高考联合质量测评2023-2024学年高三上学期10月联考数学试题
解题方法
5 . 如果![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75cb7615ca33b128496114742a1f2dd.png)
(1)求证:
;
(2)若
为三角形的三个内角,判断
与
的大小关系,并予以证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e75cb7615ca33b128496114742a1f2dd.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e10e76a8cf6e3eb92e57ee971a218a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e263f0291e3df8b6fb866abaf3f4576.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbeb449ec91ac7e5798e3b347fd0d107.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89a25e473dce119ddd92f32fef1dc576.png)
您最近一年使用:0次
6 . 已知正项数列
的前
项和为
,
.
(1)记
,证明:数列
的前
项和
;
(2)若
,求证:数列
为等差数列,并求
的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/039e4fe671d61e59b96ee525c9df43e8.png)
(1)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf114725ab617af515bf9d2571402106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9928e46511e601913619a427ded84a3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e7e6e9c815b0716de4f5515e4370f77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25cbe66fe4e84b4022721122baab4a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
您最近一年使用:0次
2023-08-29更新
|
810次组卷
|
3卷引用:山东省日照市莒县第四中学2024届高三上学期第二阶段性考试数学试题
名校
7 . 如图,在四棱锥
中,四边形
是矩形,
是正三角形,且平面
平面
,
,
为棱
的中点,
.
为棱
的中点,求证:
平面
;
(2)在棱
上是否存在点
,使得平面
与平面
所成锐二面角的余弦值为
?若存在,指出点
的位置并给以证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5830322dd2824ed012a68f1a2bd9c742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/877582b5387278008d14fe5932622fe7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4db9b82b67efe45a02fca32bfcf5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28f79db7c270b6ff9fb0a538ee201cfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef796b46e68fe77b117ff0483d2370c.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b81fb655624ff75a5eab94de9b8c8e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d923a338dd2d2e29336b42574d38448.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/072c32b9948144d040a9a83f8d11ea8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2023-09-18更新
|
1525次组卷
|
9卷引用:山东省烟台市龙口市2023-2024学年高二上学期10月月考数学试题
山东省烟台市龙口市2023-2024学年高二上学期10月月考数学试题福建省连城县第一中学2022-2023学年高二下学期5月月考数学试题宁夏回族自治区贺兰县第二高级中学2023-2024学年高二上学期第一阶段考试数学试题福建省福州高级中学2023-2024学年高二上学期10月月考数学试题福建省厦门市杏南中学2023-2024学年高二上学期第一阶段测试数学试题福建省福州延安中学2023-2024学年高二上学期期中质量检测数学试题河南省信阳市平桥区信阳市第二高级中学2023-2024学年高二上学期阶段性测试数学试题安徽省六安第一中学2023-2024学年高二上学期期中考试数学试题(已下线)2023-2024学年高二上学期数学期末预测基础卷(人教A版2019)
解题方法
8 . 如图,在正方体
,中,H是
的中点,E,F,G分别是DC,BC,HC的中点.求证:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/95825610-2015-4579-ae45-e724b0753250.png?resizew=222)
(1)证明;F,G,H,B四点共面;
(2)平面
平面
﹔
(3)若正方体棱长为1,过A,E,
三点作正方体的截面,画出截面与正方体的交线,并求出截面的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/5/95825610-2015-4579-ae45-e724b0753250.png?resizew=222)
(1)证明;F,G,H,B四点共面;
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de22059d7d80f24817235269e9bb1ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2bf9ef324f1289e205e29fed105c38e.png)
(3)若正方体棱长为1,过A,E,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
您最近一年使用:0次
名校
9 . 如图,
为矩形,
为梯形,平面
平面
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/e203ce5f-037d-48c8-bb07-1f35f66669d4.png?resizew=202)
(1)若M为
中点,求证:
平面
;
(2)设平面
平面
,试判断
与平面
能否垂直?并证明你的结论;
(3)在(1)条件下,求平面
与平面
所夹的锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5bf51c07144386bd23a422d9ceb140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6379891c7150af4188b5ab746d703bae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d20fec32122b4a70b993976201c9ba9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0046177466c78f08d45449dc5639bf38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7a201432af0a2f9d21c6803906f5c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/16/e203ce5f-037d-48c8-bb07-1f35f66669d4.png?resizew=202)
(1)若M为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8197bf06d017950c85c3ba6a291c095e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df21b7b7a47318ef2bb069450c39f1cd.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c659d2ab07b9b66ed9a60cb604dd9aa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b951997af111a840cb333a082137402.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)在(1)条件下,求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df21b7b7a47318ef2bb069450c39f1cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
解题方法
10 . 已知函数
.
(1)若
,求证:
.
(2)讨论函数
的极值;
(3)已知
,证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c62a17669c88f983c5d3da9138a9db55.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0155265d7c6452a7773de26a3cb66a6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/211e655e16740f33849b82e059b42d0d.png)
您最近一年使用:0次