1 . (1)在
中,内角A,B,C的对边分别为a,b,c,R表示
的外接圆半径.
①如图,在以O圆心、半径为2的圆O中,
和
是圆O的弦,其中
,
,求弦
的长;
②在
中,若
是钝角,求证:
;
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/b88cc3d0-c666-487e-9727-d5d16300cd3f.png?resizew=160)
(2)给定三个正实数a、b、R,其中
,问:a、b、R满足怎样的关系时,以a、b为边长,R为外接圆半径的
不存在、存在一个或存在两个(全等的三角形算作同一个)?在
存在的情况下,用a、b、R表示c.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
①如图,在以O圆心、半径为2的圆O中,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b83a71cff8e2ed9c2c93ed91a5d48671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e901c430af74f7bbce43364bd4f2e47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
②在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e0c86fd15b7ef641e45e582dd4a58a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/6/b88cc3d0-c666-487e-9727-d5d16300cd3f.png?resizew=160)
(2)给定三个正实数a、b、R,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2c659396f6a0f72e213185b1ab2e198.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
2020-04-17更新
|
1645次组卷
|
15卷引用:上海市华师大二附中2015-2016学年高一下学期期中数学试题
(已下线)上海市华师大二附中2015-2016学年高一下学期期中数学试题【全国百强校】福建省福州第三中学2017-2018学年高一下学期(实验班)期末考试数学试题上海市曹杨二中2018-2019学年高一下期末数学试题江苏省南通中学2018-2019学年高一下学期期中数学试题江苏省扬州中学2019-2020学年高一下学期6月月考数学试题(已下线)第6章三角(能力提升)-2020-2021学年高一数学下册单元测试定心卷(沪教版2020必修第二册)(已下线)第19讲压轴综合题(讲义)-【教育机构专用】2021年春季高一数学辅导讲义(沪教版2020必修第二册)湖南省怀化市第三中学2020-2021学年高一下学期期中数学试题(已下线)上海期末真题精选50题(大题压轴版)-2020-2021学年高一数学下册期中期末考试高分直通车(沪教版2020必修第二册)(已下线)大题好拿分期中考前必做30题(压轴版)-2020-2021学年高一数学下册期中期末考试高分直通车(沪教版2020必修第二册)(已下线)第20讲 期末复习(练习)提升卷-【教育机构专用】2021年春季高一数学辅导讲义(沪教版2020必修第二册)(已下线)6.4平面向量的应用C卷湖南省长沙市明德中学2021-2022学年高一下学期期中数学试题(已下线)第六章 平面向量及其应用(基础、典型、易错、压轴)分类专项训练(3)上海市复旦大学附属中学2022-2023学年高二上学期开学考试数学试题
名校
解题方法
2 . 已知数列
的前
项和为
,对一切正整数
,点
都在函数
的图象上,记
与
的等差中项为
.
(Ⅰ)求数列
的通项公式;
(Ⅱ)若
,求数列
的前
项和
;
(Ⅲ)设集合
,
,等差数列
的任意一项
,其中
是
中的最小数,且
,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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/528042c027763b53c080104675c204bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becd598a11b876d858728161a7a09705.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbbf4d763f3cbe5a71707bc19c78191.png)
(Ⅰ)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966e9d0e4acb1a4ee439609fff765ba9.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)
(Ⅲ)设集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f26f04b2318ce0cf6be85a7fd76c67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a092458a52a9fbe036064075f8fb0e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c0665c1943808f985d6b4b1917688f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7936359df4c926b72b48c6fdae55f12d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff91868da489380a5036d40b142c6e56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
您最近一年使用:0次
2020-02-18更新
|
678次组卷
|
3卷引用:2015-2016学年广东省石门中学等校高一下期末数学试卷
2015-2016学年广东省石门中学等校高一下期末数学试卷江苏省无锡市天一中学2018-2019学年高一下学期期中数学试题(强化班)(已下线)专题10 数列通项公式的求法 微点10 数列通项公式的求法综合训练
名校
解题方法
3 . 对于数列
,如果存在一个正整数
,使得对任意
,都有
.成立,那么,就把这样的一类数列
称作周期为
的周期数列,
的最小值称作数列
的最小正周期,简称周期:例如:当
时,
是周期为1的周期数列:当
时,
是周期为4的周期数列.
(1)设数列
满足
(
不同时为0),求证:数列
是周期数列,并求数列
前2020项和
;
(2)设数列
前项
和为
,且
;
①若
,试判断
是否为周期数列,并说明理由;
②若
,试判断
是否为周期数列,并说明理由;
(3)设数列
满足
,数列
前
项和为
,试问是否存在
,使对任意
,都有
成立,若存在,求出
的取值范围,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/086e9b14c35ef3c57b20f5e952ebf9c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223ed9652852ca4d996fd1f20808df9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/126141b8d68abc6a0823fade2f1b8127.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/082e8fd18cc10f578020188f254a2455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e976c0663fa749ca749f99842d21ca03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1572ac23908a3b46c6318aec4386f1c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1165edc23b5782b5942ef7e79130bb94.png)
(1)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51f68f289e17b56ff63265e61a977276.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f422edb72f7e1d5529a5570feb77df.png)
(2)设数列
![](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/efe0e18ac798a9c97104527230aed898.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9645bd4d2002993b90ec6d48f9c04f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f6fa04e7c7d34de6f0c9f3ea6feb08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(3)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022abb9d2a17457017a2374e6a9faeb1.png)
![](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/a550c916c64f621010e604a30ef67566.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5014429b696a37a9461b66f22b1800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a550c916c64f621010e604a30ef67566.png)
您最近一年使用:0次
4 . 已知数列
是等比数列,且
,
,数列
满足:对于任意
,有
.
(1)求数列
的通项公式;
(2)若数列
满足:
,
,设
,当且仅当
时,
取得最大值,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18d8e8f821111de8075e5c3dfb22a5d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a135c20407aa59f589f9e2e837fc37b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea4ac187cbb465180e89f38250b3970.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ea72f0e6d6599c25850647bdef96ec2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b783cf91e34e692ce8e171f0965cb53f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79560cd442650b675d08e9ca65856685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37115bee81c499659e8a110f907535b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/894079e90dbd238139e7c0a65239a66b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08ec5d76db9bd05547932966c9913dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1ae9a3b0b7aeb1545b65d91aa371b3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
15-16高一下·上海浦东新·期末
名校
5 . 已知数列
,满足
;
(1)若
,
,
,求
的通项公式;
(2)若
,
,
,求
的前
项和为
;
(3)若
,
,
满足
恒成立,求
的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/566395d1094e474aa8b42cf382b292ea.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558e11d700481dc414d5d073b4b88a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2753dc1c83d54044b89e628a7eb247f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/558e11d700481dc414d5d073b4b88a3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad6f1c0e0c0d5c6bc5913caf162ef87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500d68f2678989a5ce7431cfd51b019d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbe7bdaaf8b0adf10bf2ef6c1255b1dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/045a17f090f9d762ce2ce7c1804f8645.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1100379a4385b9ce064847bc21760adc.png)
您最近一年使用:0次
6 . 一台风中心于某天中午12:00在港口
的正南方向,距该港口
千米的海面
处形成(如图),并以每小时
千米的速度向北偏东
方向上沿直线匀速运动,距台风中心
千米以内的范围将受到台风的影响,请建立适当的坐标系.
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/e2411f85b0ff4b929d127e4082085db2.png)
(1)当台风中心离港口
距离最近时,求该台风所影响区域的边界曲线方程;
(2)若港口
于当天下午17:00开始受到此台风的影响,(i)求
的值;(ii)求港口
受该台风影响持续时间段的长.
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/cad9541cbf1c4c4db8e7f7672c319be2.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/7c56421c378549ddaadc08061dbfb6a2.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/7d4e72dd473b40aba6d262e698be28c6.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/a22c0916988d492a8f67c6291d768997.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/fb5f999fff054b818140d7f103523bad.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/2003a83b4cf64afca0e62d7df56e9933.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/e2411f85b0ff4b929d127e4082085db2.png)
(1)当台风中心离港口
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/cad9541cbf1c4c4db8e7f7672c319be2.png)
(2)若港口
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/cad9541cbf1c4c4db8e7f7672c319be2.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/a22c0916988d492a8f67c6291d768997.png)
![](https://img.xkw.com/dksih/QBM/2016/7/4/1572876590702592/1572876596994048/STEM/cad9541cbf1c4c4db8e7f7672c319be2.png)
您最近一年使用:0次
14-15高三上·浙江温州·期中
名校
解题方法
7 . 已知函数
.
(1)若函数
为偶函数,求
的值;
(2)若
,求函数
的单调递增区间;
(3)当
时,若对任意的
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66727de73bdb89a3cce558372ca7301.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b916c6d3fb2fdc67421489f207c93903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c989623de36d03965b327d2e49c31b80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
2016-12-03更新
|
2661次组卷
|
5卷引用:2015-2016学年浙江省杭州二中高一上期末数学试卷