已知
,
,
,其中
,
,
.且满足
,
.
(1)求
和
的值;
(2)若关于
的方程
在区间
上总有实数解,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/744ddd3c5de8e187bbe0164ad5f521a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a73f891c1e5794099619b9c4b690f096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f823cd10da091c783e9dc550926181.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/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feba51f5d46287df0a0d62cc21b2572f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a5b863d8bbb596ceb380a95a6df77c0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/403d6870199a4b338a445d80571c2910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67cfbc3d95b19e1592ef1724245cfaa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
更新时间:2021-08-24 19:54:19
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【推荐1】已知函数
,其中
,函数
图象的一条对称轴方程为
.
(1)求
的单调递增区间;
(2)将函数
的图象向左平移
个单位,再将所得图象上各点的横坐标缩短为原来的
倍(纵坐标不变),得到函数
的图象,求
在区间
上的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c932be254fde1f224697a0cceb93282d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84c0132454e4475c3fbddcbfdfc4fab3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c5a2e8a8ce17b9dd84ce10933358859.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf9c2a14f31481ee2c32e0434157a4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.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/f0fb558678dc320d437c98c54052296d.png)
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解题方法
【推荐2】已知函数
.
(1)求函数
的最大值及取得最大值时x的所有取值;
(2)将函数
的图象上各点的横坐标伸长为原来2的倍(纵坐标不变),再将得到的图象向右平移
个单位长度,得到函数
的图象,若存在
,使得等式
成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df827b1a9e81f5046fd3fe6ed0b83fa.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b09040b87c05a00ebbc7c9bb286ab5eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2818807dce7e9ec5514de572c3cc644.png)
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【推荐1】已知向量
,
,定义函数
.
(1)求函数
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(2)求函数
的单调递减区间;
(3)求函数
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上的最值,并求出取得最值时
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f719d69a53c3829deb64973593a7fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/713471b87a94c8ccc125fa1692e5b479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3c457fd6852fc3693aaa9a88dc76df2.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38fee19fef930b81f2605c4642b6211c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】已知
最大值为2,若满足
,
(1)求
和
的值;
(2)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a41b8ea5a5401c9bd7987f478571a636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff47e684c3a1e576155a1be901fb29a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ed74dbeba7d418a559f9c97c1df414.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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【推荐3】如图,扇形
的圆心角
,该扇形半径
是弧上一点,过
分别作
,
的平行线,分别交
(或其延长线)于
两点.设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/58222dd5-f74b-40e9-a464-8ef25f94fe84.png?resizew=200)
(1)把平行四边形
的面积
表示成
的函数,并求出其最大值;
(2)设
,当点
变化时,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950e673dc286ecdfa54dc7ab146770b8.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a5e484dfef494d27bc35ae7b8cf75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394d49b7b16d3871b3795b1b7fa2078d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/8/58222dd5-f74b-40e9-a464-8ef25f94fe84.png?resizew=200)
(1)把平行四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce8737bbbe2e8d297a76dcbce42e4a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f00dfb5ae6e0421979b83031d6f38df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b61c74eec759a9247b38bf5f73fb416.png)
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【推荐1】已知向量
,
.
(1)当
时,求
的值;
(2)设函数
,且
,求
的最大值以及对应的x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b81e3445a9423a1b2451e45e44a8aece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9a5053c4b6405aea48d20941604f259.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70facc9bc02af0867d248407bd317c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3919d3025f2ac71c46f181218429.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0b6097c8bd10809c902d9293686baba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d49ec515fb1fdc93ca4dda443326ad5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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解题方法
【推荐2】已知半圆圆心为O,直径
,C为半圆弧上靠近点A的三等分点,若P为半径OC上的动点,以O点为坐标原点,AB所在的直线为x轴,建立平面直角坐标系,如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/c0e78fa9-df1b-44a4-92cc-13ded1fbc78f.png?resizew=200)
(1)求
在
上投影向量的坐标;
(2)若
,当y取得最小值时,求点P的坐标及y的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/30/c0e78fa9-df1b-44a4-92cc-13ded1fbc78f.png?resizew=200)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef8337706c550bc095d7a2bd872221a1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54780602dd966dfca0baa7b58f6c11a3.png)
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