已知向量
,
,函数
.
(1)求函数
的单调递减区间;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffadd7ba500fe29c744f83c77e563184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db0b5b80fc05fd15661ccb311293659e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8e7b2150ed88d3ffdec3d142617eacf.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a4ec91ef3459dab187772cbb400786f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b287ccc9c3fc72b92b3fb337ecec199.png)
更新时间:2016-12-04 06:22:50
|
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解答题-问答题
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适中
(0.65)
名校
解题方法
【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e489e1dde5840265d59c20e0968af4.png)
(1)证明函数
在
上为减函数;
(2)当
时,解关于
的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e489e1dde5840265d59c20e0968af4.png)
(1)证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2372f424431ce7b547a66b7d61d75421.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e67213c1b95e8a911924dc7a10770058.png)
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【推荐2】⑴已知
,计算
.
⑵.已知
, 0<β<
, cos(
-α)=
, sin(
+β)=
, 求sin(α+β)的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d4e02ece77bde4dc14766f777f66924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58c03d00b356a9fc29a98684cb7af5b6.png)
⑵.已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83f60ed35a7e27ea2af5a98103a6cf89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b199d124fb9a5bc8438c9884f04534.png)
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【推荐1】在
中,内角
所对的边分别是
,已知
.
(1)求
的值;
(2)若
为锐角三角形,
,求
的值.
![](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/8ad0652b09593b08a880918fecfd21e8.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32f2d4d1d2c16c54b2caef17840bfcb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6377e7db05e7e2bba3651be7e743e96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dcfa3e340b3976832d450dd4ae7e7a7.png)
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【推荐2】已知函数
,其图象过点
.
(1)求
的值;
(2)将函数
图像上各点的横坐标缩短到原来的
,纵坐标不变,得到函数
的图像,求函数
在
上的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbca9ffe3998300cc753b7e03229067.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69106e228f69c6340c3f13d2c54de880.png)
(1)求
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(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a1cfb60420ff7e72c1b9d64f69ae063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e19c07e48ce4d9023a97543ad7d8b404.png)
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【推荐1】在
中,设
,记
的面积为
.
(1)求证:
;
(2)设
求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c59146c0725095d4bca6caa7b3357ecc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba2a1bf3e72ec2c2004495bc5a5aa68.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a5a13ec22ea22408270baaaf4514eaa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0066f0f0e650bc85331c4e3db945f4b5.png)
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【推荐2】已知复数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d6efab18480878c728ca1f5712657fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58aa9645f9e9e3aa990e28a614a0380a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae470980d6e3b53c65b9d42d1f011c5.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bc1f08c7640e62e8717abf4d44a6c83.png)
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(2)复数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d860cb86e1467ac24010aecfc7a425.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71c37fc79619507a7ea309a14794555a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8a4f93274f06ba1fa756163ef082c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152f33e0c3380e2ddb3f35781a5b5314.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb7228ccc4fffb86489a02f0588d3761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1040ac7b05cd9f524a7ce965abffc04a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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【推荐1】已知函数
,
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(1)求函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4d76806a6eac8d7c089a80a845549d.png)
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(1)求函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb3179b6997ccc6fabc98b1ea5304720.png)
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