![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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)
(1)若
![](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/35173fdbbb36b8dec58fcc19f3d9687a.png)
(2)若
![](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/c1311f32edf13f8caee5edb03f24a7ba.png)
18-19高一下·湖南长沙·期末 查看更多[2]
更新时间:2020-02-13 19:23:07
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相似题推荐
解答题-问答题
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【推荐1】在
中,角
的对边分别为
,且满足
.
(1)求角
的大小;
(2)设函数
,当
取最大值
时,判断
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/e4e41e7cd5514d3ac0e7adc537882317.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60c5f2f07985a206055299a2af1e6e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de0f6d2b676fb885e43df4db0ed66d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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【推荐2】已知
的内角
,
,
的对边分别为
,
,
,满足
.
(1)求角
的值;
(2)若
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ff214d99784c6b23b7784bdaf3ed37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da9dcf6c319174c9ea2b1ceaed1649a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1132157a33c82610c2d5035493d024.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fdeba282b028321696be7f90f2cbfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3aa688caadfeb5bdf9c7dfecb5afa31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a56c6dcda6ccb2bdccc2932e7bbebc.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4cfd6f114806a1ae4e5ef46f9685d9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9472be3ec78aa34e289b2e91e815c40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f3ff8aa8ec0c9dd40597c917564916.png)
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【推荐1】设a,b,c分别为
的三个内角A,B,C所对的边,向量
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.
(1)求B;
(2)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71be3973ead08608ecc100c022abecf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc9c22e445fd2e7d7e33f87116dbd1a.png)
(1)求B;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4f68e1d570cef43494fb350f482dbb.png)
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【推荐2】已知双曲线与椭圆
有公共焦点
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(1)求双曲线的标准方程;
(2)设P是双曲线与椭圆的一个交点,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3160d5fcc82f49cfd08ff7c0fe8cb31e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30691648101bd1334f1c007c9aa332d1.png)
(1)求双曲线的标准方程;
(2)设P是双曲线与椭圆的一个交点,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf10adebe7d6ab8f4f2ecf1c6b20098.png)
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【推荐1】已知等比数列an的公比q1,
是
的等差中项,数列anbn的前n项和为Sn=n2+n.
(1)求数列an的通项公式;
(2)求数列bn的通项公式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941bf78bcaa66f7ccce357235d445c89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14877bf6d7297f02feff3468abf01f69.png)
(1)求数列an的通项公式;
(2)求数列bn的通项公式.
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【推荐2】如图所示,已知某梯子共有5级,从上往下数,第1级的宽为
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,且各级的宽度从小到大构成等差数列
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73f6eb456829de6bfed5b65c7232435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34d378f597deee1b3087f6d0698b6cfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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