11-12高三上·黑龙江大庆·期末
1 . 已知
、
、
分别为
的三边
、
、
所对的角,向量
,
,且
.
(1)求角
的大小;
(2)若
,
,
成等差数列,且
,求边
的长.
![](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/15c0dbe3c080c4c4636c64803e5c1f76.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/4cc967b368b7b8024724b71104b0dcca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1714a25996b4a21018babcf8d9b59727.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba8e95eb28a6fcd49793ffc152e2dcf2.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc10d94077af7f8118e2f26c8503ede.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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2 . 已知函数
的部分图象如图所示.
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625398445187072/1625577873121280/STEM/ab6f126392f94345852784e0abadcc66.png?resizew=198)
(1)求函数的解析式;
(2)将函数
的图象上所有点的纵坐标不变,横坐标缩短为原来的
,再将所得图象向右平移
个单位,得到函数
的图象,求
的单调递增区间;
(3)当
时,求函数
的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa6e3317bce5fa53fcf77c81dfdcbbe.png)
![](https://img.xkw.com/dksih/QBM/2017/2/16/1625398445187072/1625577873121280/STEM/ab6f126392f94345852784e0abadcc66.png?resizew=198)
(1)求函数的解析式;
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dc6e69ad1a27916fb5c3d5901ded134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e03ad0c315806342d6cd732a0b91a3.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a3a4ce3201d71cf66cd92641da4da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6150b80607c99d00e7de85b21200d8ff.png)
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11-12高三上·浙江绍兴·期末
名校
3 . 在△ABC中,角A,B,C所对的边分别为a,b,c,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df56781e76c1b28fdad4049486306941.png)
(I)求角B的大小;
(II)若b是a和c的等比中项,求△ABC的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df56781e76c1b28fdad4049486306941.png)
(I)求角B的大小;
(II)若b是a和c的等比中项,求△ABC的面积.
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