解题方法
1 . 证明以下结论:
(1)已知
,求证:
;
(2)若
均为实数且
.求证:
中至少有一个大于0.
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ada798eeba5bd19d497bfd0741afd00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbc2278547879e9246de7e749a774d7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9ebe6c33debb66a7cbc9ecddc6c89de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
您最近一年使用:0次
2 . (1)已知
,
.求证:
;
(2)在
中,内角
的对边分别为
.若
,用反证法证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6455e38ff53ede2508e4d9cb23f0b86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91a871ef7bf13de3e15489d65b57a3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b32e1a1c8cb8f9fdab1d90cb9507c97.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432d77fe5ad3032d59a237dd94c8a638.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b774018122dfbf609f08bdbe111e2ab4.png)
您最近一年使用:0次
名校
解题方法
3 . (1)已知
,
为正实数.求证:
;
(2)某题字迹有污损,内容是“已知
,
,用分析法证明
”.试分析污损部分的文字内容是什么?并说明理由.
![](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/b75e17b53ee815ef4853237102ba053e.png)
(2)某题字迹有污损,内容是“已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88a6bea084567e3055f0e58499398a46.png)
![](https://img.xkw.com/dksih/QBM/2020/4/30/2452889272393728/2453866042122240/STEM/13b50dcb80e249d58f2b6fbf25a9fa84.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee13943cafab8982712aceb2cfb73f9.png)
您最近一年使用:0次
名校
解题方法
4 . 固定项链的两端,在重力的作用下项链所形成的曲线是悬链线
年,莱布尼茨等得出悬链线的方程为
,其中
为参数.当
时,该表达式就是双曲余弦函数,记为
,悬链线的原理常运用于悬索桥、架空电缆、双曲拱桥、拱坝等工程.已知三角函数满足性质:①导数:
;②二倍角公式:
;③平方关系:
.定义双曲正弦函数为
.
(1)写出
,
具有的类似于题中①、②、③的一个性质,并证明该性质;
(2)任意
,恒有
成立,求实数
的取值范围;
(3)正项数列
满足
,
,是否存在实数
,使得
?若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46a7e0115ce78639910150e39fdbdb0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f07f8015f0a035e80a166092be0b7318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a7c1d3681898e25187a896aeb0c8c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf8bce35b539fdf365e9089750d4d152.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32eac4b7f177c041219fab18de973c5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af7ca3fcd9a43d520ed650b80ef2dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0718c04bdf70989bcc90b902671a692.png)
(1)写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a53b8e0108664bf39aa302570457199a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6e7c627427318b62d977ff7a86c2cb5.png)
(2)任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a68fd5f6e28316a932db1494deac24b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)正项数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19bf566cd9dd81916f53ed33248197c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f816db73b759d7de72b0bd43ba39f46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ecf3a1fecf89a37a677393d0bfe27b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/805dabba8d859d870a1dfaaa9d97de41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2024-06-02更新
|
445次组卷
|
2卷引用:江西省萍乡市2024届高三二模考试数学试卷
5 . 如图所示的几何体是圆锥的一部分,
为圆锥的顶点,
是圆锥底面圆的圆心,
是弧
上一动点(不与
重合),点
在
上,且
,
.
时,证明:
平面
;
(2)若四棱锥
的体积大于等于
.
①求二面角
的取值范围;
②记异面直线
与
所成的角为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafac5bb0e6d2bea4bd16b1f0d2e899a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab609a6574633ebabcff3e73fa862081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0825161b7088d1415e8ed396cbe4007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d709bff619f3b55f8adf43db0b53eae1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c142bcb49bf09788d4790b198b184b66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cceb0a3e6aaa2754aa3f67cfd13d1dde.png)
(2)若四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28ba8a560e3b54f9346f2a6a805c016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004b3257c1daa6a54e90a349d3339926.png)
①求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/097ca5c5afa3d2598de2ef821906e438.png)
②记异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a282d19bf2c827a98d4443330f7ca1.png)
您最近一年使用:0次
解题方法
6 . 如图,
是边长为4的正方形,
平面
,
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/0f4ffa94-cd65-4404-8b0f-ebaac56bcefa.png?resizew=155)
(1)证明:
平面
;
(2)线段
上是否存在一点
,使得点
到平面
的距离为
?若存在,求线段
的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8139d9fd5c670c91aa7dc485366dd1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba02c4ed0787d5032dcf194304a1ab0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/0f4ffa94-cd65-4404-8b0f-ebaac56bcefa.png?resizew=155)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8ccd4181f956f6e0140bf0ab8f0716.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678b28fddb166d90878d24d6e5481080.png)
(2)线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e748de03fae345643615176b133bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
您最近一年使用:0次
7 . 如图,在四棱锥
中,底面
是菱形,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/c37a4180-ee51-46a3-b12c-f20398a431b9.png?resizew=170)
(1)证明:
;
(2)若异面直线
与
所成角的余弦值为
,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/931bbffda5e872703c9947eccc47ede2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/c37a4180-ee51-46a3-b12c-f20398a431b9.png?resizew=170)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
(2)若异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa42621cd6793e7f3673fdb49bc3123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c7a937699f989b685f285041434000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c97bc6d754ac8cfbc7d5576edbb81a.png)
您最近一年使用:0次
8 . 已知函数
.
(1)判断函数
在区间
上的单调性,并用定义证明;
(2)用二分法求方程
在区间
上的一个近似解(精确度为0.1).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42714fb3ee2dd8f509c641e22c569634.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
(2)用二分法求方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
您最近一年使用:0次
9 . 在数列
中,
,
.
(1)证明:
为等比数列.
(2)设
,若
是递增数列,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd76ba75c3d9f110d1ae3e1e328c5772.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7d94406136605c5bc9cd9295d6c9fa.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b23156e479c775364adb51aae43193fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2023-09-13更新
|
358次组卷
|
4卷引用:江西省萍乡市2022-2023学年高二下学期期中数学试题
江西省萍乡市2022-2023学年高二下学期期中数学试题湖南省永州市江华瑶族自治县第二中学2023-2024学年高二上学期期中数学试题(已下线)第4章 数列 章末题型归纳总结(1)(已下线)5.3.1 等比数列(5知识点+6题型+强化训练)-【帮课堂】2023-2024学年高二数学同步学与练(人教B版2019选择性必修第三册)
10 . 已知各项均为正数的数列
的首项
,其前
项和为
,从①
;②
,
;③
中任选一个条件作为已知,并解答下列问题.
(1)求数列
的通项公式;
(2)设
,设数列
的前
项和
,求证:
.
(注:如果选择多个条件分别解答,按第一个解答计分).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.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/e0378a967740b639bf083fefca36b727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d07ea085e190bed813860d492292efb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd7f923a032d19e965858d4fdf45771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58693764692ff0194a846f842b780274.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00f934ec9aa1208cb375e7559070880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c55e9df52276e2d89c646a0714bbee8f.png)
(注:如果选择多个条件分别解答,按第一个解答计分).
您最近一年使用:0次
2023-08-03更新
|
839次组卷
|
5卷引用:江西省萍乡市安源中学2022-2023学年高二下学期期末考试数学试题
江西省萍乡市安源中学2022-2023学年高二下学期期末考试数学试题云南省2023届高三“云教金榜”N+1联考·冲刺测试数学试题(已下线)模块四 专题8 劣构性问题 (基础)(已下线)第06讲:数列求和 (必刷5大考题+5大题型)-2023-2024学年高二数学上学期《考点·题型·难点》期末高效复习(人教A版2019)(已下线)专题05 数列 第一讲 数列的递推关系(分层练)