已知函数
.
(1)若关于x的方程
在
上有解,求实数m的取值范围;
(2)记
的内角B满足
边上的高
为2,求
的最大值;
(3)函数
的图象纵坐标不变,横坐标伸长为原来的4倍,再把整个图象向左平移
个单位长度,再将函数图像向下平移1个单位得到
的图象.若
,
,问在
的图象上是否存在一点P,使得
.若存在,求出P点坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cd720d9fdd0c50c78ec38d2e4ce88b3.png)
(1)若关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf59dabfc300da958b09c69adee5fdec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc6ff1d0b0ca8f7fa1a14f4f7f4523a.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10b0c3567b34dd24330edfb1702ade93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7efbaf541503e7b90473c1828646037b.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd7d40599b45eae3a40a8ffce819241.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/507ac24ab4c003ca56b70fe7d8dc979a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95980466716ae5a3efe177ab67a2a11a.png)
更新时间:2021-07-29 17:59:59
|
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解答题-问答题
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适中
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解题方法
【推荐1】已知函数
.求:
(1)函数的最小正周期;
(2)函数的最大值和最小值及取得最值时x的值;
(3)函数的递增区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55036377d715f724c46558e2588cab93.png)
(1)函数的最小正周期;
(2)函数的最大值和最小值及取得最值时x的值;
(3)函数的递增区间.
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【推荐2】已知函数
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(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d1f242bf348fa4b97546810c4af7a7.png)
(1)求
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(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a959e5ffc2a5c0d8f6c4f1bc6e824885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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【推荐3】已知函数
(x∈R).
(1)求
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(2)求
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上的最大值和最小值,并分别写出相应的x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9933d47a42b8656d1a14587b2086f526.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee4f5a4487da2d18cc61112f0c468e11.png)
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【推荐1】已知函数
.
(1)求函数
的最大值;
(2)把
的图象上所有点的横坐标伸长到原来的2倍(纵坐标不变),再把得到的图象向左平移
个单位,得到函数
的图象,求函数
的单调递减区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060277154f3cc14f27a856ca2771366e.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
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名校
解题方法
【推荐2】已知函数
,若将函数的图象
向左平移
个单位长度,再向上平移
个单位长度得到函数
的图象.
(1)求函数
的解析式和值域并求取得最值时x的集合.
(2)若对任意的
,
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/525cb9f09708fd732fdc5da71009406e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdaf49f9611922348aa2784465da614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(2)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da3d71b6d3df86b5dbb6d866b0dde1fa.png)
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【推荐3】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5e2a383cb47eb87493e86c8c40caf0.png)
的部分图象如图所示.
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634689849024512/2635299211018240/STEM/e8b0593dbc3b4d5f8a3977a1b58d9b52.png?resizew=250)
(1)求函数
的解析式;
(2)将函数
图象上所有点的横坐标缩短为原来的
,纵坐标不变,得到函数
的图象,若函数
在区间
上单调递增,求实数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5e2a383cb47eb87493e86c8c40caf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6acf33971fbe56418805438cd4a6e974.png)
![](https://img.xkw.com/dksih/QBM/2021/1/12/2634689849024512/2635299211018240/STEM/e8b0593dbc3b4d5f8a3977a1b58d9b52.png?resizew=250)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0d22b4f59983f7d86f0df8dc37f49ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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适中
(0.65)
解题方法
【推荐1】已知函数
,函数
的图象经过点
且
的最小正周期为
.
(1)求函数
的解析式;
(2)若
对任意
恒成立,求实数
的取值范围;
(3)将函数
图象上所有的点向下平移1个单位长度;再将函数图象上所有点的横坐标变为原来的2倍,纵坐标不变;再将图象上所有的点的横坐标不变,纵坐标变为原来的
倍,得到函数
图象,令函数
,区间
(
且
)满足:
在
上至少有18个零点,在所有满足上述条件的
中,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/201b48e85ede8d398c4684588cdda352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72a177d7c16a192fa12cc85a3b7701ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49f8a63ddbca52039fa9ab44cda6b29.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c36d9c6898959646d811f256fd830bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b604c6522119e77c1cb16b91532a2c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f030c36bb8786df88d401792062a4100.png)
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【推荐2】已知函数
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,
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(1)求函数
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(2)将函数
的图象向左平移
个单位长度,再向上平移1个单位长度得到函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e5aa0870e14a67dcf3cb2c59a471568.png)
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(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdaf49f9611922348aa2784465da614.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5de4db0a0a35547c238f75890854506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1752b5010bdfcd93e912dfade2499d1c.png)
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【推荐3】已知函数
.
(1)求函数
的单调递减区间;
(2)若函数
在区间
上恰有3个零点
,
,
(
).求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10248dc7fade3e139bd402db4df87752.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9de1deb290aac5be453c92c61ea8c220.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370dae31a733204100e782a2a5810504.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1310a7a80d1f8751a3f8cafe7f8c8b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91aa89854db0c9ab64f34194ee9dd4a.png)
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【推荐1】已知向量
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(1) 求向量
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(2) 若
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(1) 求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af89864f1c909eef31ebbe3178c048a4.png)
(2) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4120436d6ff0c58109473edc068257c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14d829cf19ffa06dec548e21d0cc22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eacde1c42151734fdc60f3001b590de.png)
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名校
【推荐2】已知
,
,
.
(1)若
与
垂直,求
的值;
(2)求
的最大值;
(3)若
,求证:
∥
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cdbff85a78e01a2ab86883daf79521f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/175b04eabd8e3fb0b39d6fac797122e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d969cc2a792970836c4224375dfac91.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59b3e2be40b9fb85df77aad1242325e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c1f914da4657eca7865982b130b299.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b8dc2599cb77bbc1db851a98ea3014.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f951968f8f372db185fc3022b55ad13b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
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