已知向量
=(2cos ωx,-1),
=(sin ωx-cos ωx,2)(ω>0),函数f(x)=
+3,若函数f(x)的图象的两个相邻对称中心的距离为
.
(1)求函数f(x)的单调增区间;
(2)若将函数f(x)的图象先向左平移
个单位,然后纵坐标不变,横坐标缩短为原来的
倍,得到函数g(x)的图象,当x∈
时,求函数g(x)的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560ee2894ba8c5cee6633430cc8b3b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741574f71252839af5c088cf224bf159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
(1)求函数f(x)的单调增区间;
(2)若将函数f(x)的图象先向左平移
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18a52298e06894173520ca36a565bef5.png)
2021高三·全国·专题练习 查看更多[2]
更新时间:2021-04-16 22:00:23
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【推荐1】已知
.
(1)求
的图象是由
的图象如何变换而来?
(2)求
的最小正周期、图象的对称轴方程、最大值及其对应的
的集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/704c6e8afb0d2e50e0d7d1907bac7e07.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1836f929b06fa82fb6573f28b71a3b01.png)
的最大值为6.
(1)求
.
(2)将函数
的图象先向左平移
个单位长度,再将所得图象上各点的横坐标缩短为原来的
,纵坐标不变,得到函数
的图象.求
在
上的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1836f929b06fa82fb6573f28b71a3b01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37c35a8ae5caef9c99712e789cd3c10.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdaf49f9611922348aa2784465da614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc3c995be516cf27b01f0e3fda859d75.png)
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【推荐1】在如图所示的平面直角坐标系中,已知点
和点
,
,且
,其中
为坐标原点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/bc00847f-b228-4a86-984f-307c5e06565c.png?resizew=145)
(1)若
,设点
为线段
上的动点,求
的最小值;
(2)若
,向量
,向量
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8748dc55e2f45bc37fc4d84d7310f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d42f05b013e4b7166cbc87c5a83d6a85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba65e7a774e56f9fac82d44758951b1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f435c3556b48f0eccc958240fc6c7d6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/bc00847f-b228-4a86-984f-307c5e06565c.png?resizew=145)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e6e786cf092be7473ed346780477ea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dd7a30915a5f874003d1a3002bb8b89.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7d4e4a30f64d8ffccb3fb538ed91b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b8eda2b91870c161276e9a5276472db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/094cdfe6b117f4600fdf255112d2c472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f643616cd3d2459c506c8647641f081f.png)
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解题方法
【推荐2】若函数
(
),非零向量
,我们称
为函数
的“相伴向量”,
为向量
的“相伴函数”.
(1)已知函数
,求
的“相伴向量”;
(2)记向量
的“相伴函数”为
,将
图象上所有点的横坐标伸长到原来的
倍(纵坐标不变),再将所得的图象上的所有点向左平移
个单位长度,得到函数
,若
,
,求
的值;
(3)对于函数
,是否存在“相伴向量”?若存在,求出
的“相伴向量”;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c6f29b2b1955715616003d51d8b77f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/773ca22fc12ade9e60dbc749ba5cfa73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e02a2530966362c93c56617f448f449c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(1)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53bf638cbaa2321e25f2e5a2bb48ea2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)记向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c917a01eab9c7fbabef4382d32a0257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1bea28b97aeeb961b2522670dbc4b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/046387911745f43ff3b6804ea58eb26a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
(3)对于函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bab529b3f6a52dbe10551dfc8ec57d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2775ffdf695af2d263f0ea93ac5904.png)
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【推荐3】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5a003df3716db60ea66ba2ea3f456c.png)
(1)求函数
的对称中心及
在
上的单调递增区间;
(2)在
中,角A、B、C的对边分别为a,b,c,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5a003df3716db60ea66ba2ea3f456c.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3aae9c8988f4a48db69cad3308942c9.png)
(2)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/561dddf17063705e7a875438b0367daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec92d9b39ad44b45b31952b5cb56a3b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b01adc561735ff5be9bb97266918f2.png)
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【推荐1】已知点
和抛物线C:
,过点A的动直线l交抛物线于M,P,O为坐标原点.
(1)证明:
为定值;
(2)若
的面积为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527adf33876b600568772d6ff0a91310.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/571ed17924d6331c9c065101dcd40356.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/225c0723cc3e08112fde8a02051997d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d0817bc921185f4fa539e9d0b3d460.png)
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解题方法
【推荐2】如图,在直角梯形
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981274494746624/2982638491312128/STEM/277707cf-9511-4ed9-a2fc-1921f3e830fd.png?resizew=187)
(1)若
,求
;
(2)若
,求
在
上的投影向量的模长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27db558e8db4c957654c8e5cecd2d2dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10f322f8f148fbbaa38b6c0218ae68fe.png)
![](https://img.xkw.com/dksih/QBM/2022/5/17/2981274494746624/2982638491312128/STEM/277707cf-9511-4ed9-a2fc-1921f3e830fd.png?resizew=187)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1064febe4e68fa2a5dccc0e7e6d75f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a579833964a06b5d103a1176e91325.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8845fadc307f1d308410e829becedd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed2cf03ac7a1b0aba75daa3b9f9b5768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
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【推荐3】已知
,
,函数
.
(1)求
在区间
上的最大值和最小值;
(2)求
的单调递增区间;
(3)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea78a694e1321980e289d4c87fa636e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c311dd4b921134b074872de5003597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc1525aee9019a25cf71dc6054ec1ce.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de694144e7993d8a34e6c5d98664d031.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdc5ef320a101441a259ef0e0c99454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be4294969081f21f0b40a93170b937a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2ff0e5c78c04beea4e773185195da30.png)
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【推荐1】函数
且满足___________.
①函数
的最小正周期为
;②已知
,
,且
的最小值为
,在这两个条件中任选一个,补充在上面横线处,然后解答问题.
(1)确定
的值并求函数
的单调区间;
(2)求函数
在
上的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7db49a53309eaa0b19bcac873523071e.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33bd24e647a626899a243a3f3984f90a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057e40cbaf03415c95cb031997621cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc6abf3f9b0ebcdc47a028c781b7edb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
(1)确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21376567e7a56b85e967dc4f2a5cef3.png)
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【推荐2】(1)函数
在什么区间上是减函数?
(2)函数
在什么区间上是增函数?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96b1dd232a675a5545d411369c3c222.png)
(2)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd17327b32e0008c2010c46cb9a37281.png)
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