名校
解题方法
1 . 已知等差数列
中,
,
,又
,
,其中
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a36c991ead895bd324c9d9122061c6e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09e531e77daca6a6c142e30ebaeb1f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd5a269601500792fb0588c30ad5241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19fc0305945b1147722d56e876599e86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15100cab0a8f1fb3a2668fb0d20ef38f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1db796b223b35e52aa7b4114da8072f5.png)
A.![]() ![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 设
的内角
所对的边分别为
,且
,则
的最大值为
![](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/c50dcf692b54ea9c3ee09f7e7a595295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb1cc5ce43b5fad609f8bdf8066d121.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-12-03更新
|
2112次组卷
|
5卷引用:【校级联考】福建省龙岩市长汀、上杭一中等六校2018-2019学年高二(上)期中数学(理科)试题