名校
1 . 已知向量
,
,
.
(1)若
,求实数
,
的值;
(2)若
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daaf346e95acdec46177526944b1945a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3330a4c7e5ba2103f30ebabf0921f60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9812303d2eba23689974e92f314cfb55.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b19ad8c709c75f6625ee36ba4a4d07d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c1a869384402cbc7c98d39627780b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
名校
2 . 已知等差数列
的公差为正数,
与
的等差中项为
,且
.
求
的通项公式;
从
中依次取出第
项,第
项,第
项,
, 第
项,按照原来的顺序组成一个新数列
,判断
是不是数列
中的项?并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da2f386b78cdf6489efaa2f5820d3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3304e23f3b0f9569c4140ca89b6498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b6ce9f12ea81e9de3b7b5c1a4e3905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c4c029e552954bd493b49aeab82d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daa5e9bd516f6282483b92cfe6074623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43f41be870e84c819362787849770519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f97cf99f7d08731763e278491f2d87c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
您最近一年使用:0次
2020-07-26更新
|
778次组卷
|
5卷引用:四川省绵阳市第一中学2019-2020学年高一下学期入学考试数学试题
名校
解题方法
3 .
的内角
,
,
所对的边分别为
,
,
,向量
与
平行.
(1)求
﹔
(2)若
且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6944379c49afaee22d84eb0060cdc328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242ab9eb7d7519369d6ee28693fb99d6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d974e2ae4df0a59fc7c24634bce92b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a99bb77a5ec8629e26b0329a8a21db2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/980ab4deb9e7f2bc9288787f5243a4d2.png)
您最近一年使用:0次
12-13高三上·福建福州·期末
名校
4 . 如图,在△ABC中,已知B
,AC=4
,D为BC边上一点.
(I)若AD=2,S△DAC=2
,求DC的长;
(Ⅱ)若AB=AD,试求△ADC的周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b3052da2d1bc23ddce31da1fbe42a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
(I)若AD=2,S△DAC=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c3f8c3ba00c59e0634ed10fa85289de.png)
(Ⅱ)若AB=AD,试求△ADC的周长的最大值.
![](https://img.xkw.com/dksih/QBM/2012/2/20/1570753970348032/1570753975787520/STEM/c49df7c1c06b4e48bd90e13e84bb3eb5.png?resizew=181)
您最近一年使用:0次
2016-12-01更新
|
914次组卷
|
6卷引用:四川省绵阳市第一中学2019-2020学年高一下学期入学考试数学试题
四川省绵阳市第一中学2019-2020学年高一下学期入学考试数学试题(已下线)2012届浙江省温州市第二十二中高三迎一模复习试题文科数学(已下线)2012届福建省福州市高三第一学期期末质量检测理科数学(已下线)专题18 解三角形-2020年高考数学母题题源全揭秘(浙江专版)沪教版(2020) 一轮复习 堂堂清 第三单元 3.5 正弦定理,余弦定理(一)广东省清远市连南瑶族自治县大坪镇大坪中学2020-2021学年高二上学期期中数学试题