已知函数
.
(1)当
,求函数
的最小正周期和对称中心;
(2)若函数
在区间
上单调递增,求
的取值范围;
(3)若函数
在区间
内有且只有两个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da8ae6680bbe5fc9cf767bc92db40df1.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05a467ddaa138590b3b56615c2c42a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61b0300f1a05230287c79d53bf4ddb43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fed440b9f974492068a68203e5029f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
更新时间:2023-02-14 10:01:34
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相似题推荐
解答题-问答题
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适中
(0.65)
【推荐1】已知函数
.
(1)求函数
的最小正周期,并求
的单调递减区间;
(2)将函数
的图象向右平移
个单位长度,再把横坐标缩小为原来的
(纵坐标不变),得到函数
的图象,当
时,求函数
的值域;
(3)对于第(2)问中的函数
,记方程
在
上的根从小到大依次为
,试确定n的值,并求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30d2d359d6d3cf9b5c3b1b7a7d8afc77.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)将函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67d01e61dc0042e67b5e8ec8e727c22.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/061b36d616b2e0dcfd3bf193864abb6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
(3)对于第(2)问中的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56c40363783d0e33e6a40e68957391ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00c13095bd23d0ef686b543a9d9cbd71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5ae7762f2129fc2edaad856996836aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf143ca6acd9bafcce6716f4e6f2d9a3.png)
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【推荐2】如图是函数
(
,
,
)的部分图象.
![](https://img.xkw.com/dksih/QBM/2021/6/5/2736409096232960/2746894995144704/STEM/956b74e4-8779-4a83-abd4-6d7ecff99536.png?resizew=228)
(1)求函数
的表达式;
(2)若函数
满足方程
(
),求在
内所有实数根之和.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af5e2a383cb47eb87493e86c8c40caf0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d65b6b24f2b83a74a2a6f7afb1df89.png)
![](https://img.xkw.com/dksih/QBM/2021/6/5/2736409096232960/2746894995144704/STEM/956b74e4-8779-4a83-abd4-6d7ecff99536.png?resizew=228)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338316b0fe50fdea0f2f75aec4c990dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bccd6a6e85bdf500218a3e75b31f3c.png)
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【推荐3】随着我国综合国力的不断增强,不少综合性娱乐场所都引进了“摩天轮”这一娱乐设施.(如图1)有一半径为40m的摩天轮,轴心
距地面50m,摩天轮按逆时针方向做匀速旋转,转一周需要3min.点
与点
都在摩天轮上,且点
相对于点
落后1min,当点
在摩天轮的最低点处时开始计时,以轴心
为坐标原点,平行于地面且在摩天轮所在平面内的直线为
轴,建立图2所示的平面直角坐标系.
![](https://img.xkw.com/dksih/QBM/2020/7/9/2502381061545984/2503093476507648/STEM/a00ee699bd6646169b1a8e83eec406c8.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/2020/7/9/2502381061545984/2503093476507648/STEM/b914f130dffd47678a4f90d441815d73.png?resizew=335)
(1)若
,求点
的纵坐标关于时间
的函数关系式
;
(2)若
,求点
距离地面的高度关于时间
的函数关系式
,并求
时,点
离地面的高度(结果精确到0.1,计算所用数据:
)
(3)若
,当
,
两点距离地面的高度差不超过
时,求时间
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2020/7/9/2502381061545984/2503093476507648/STEM/a00ee699bd6646169b1a8e83eec406c8.png?resizew=155)
![](https://img.xkw.com/dksih/QBM/2020/7/9/2502381061545984/2503093476507648/STEM/b914f130dffd47678a4f90d441815d73.png?resizew=335)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ece024a8f0185a69b2469b63d3352ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0fe078823d44ad59b3048bb5bc39d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37f1e0268e7e4ace8e70b4d38ad6d08d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ece024a8f0185a69b2469b63d3352ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0fe078823d44ad59b3048bb5bc39d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0225bca34eaf19544939b29153aac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90e5c79db3774dc8fef30deee078e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105bbdf65f5f6990974de7aa0beb496d.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ece024a8f0185a69b2469b63d3352ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74206de7c75618925864591fc27097b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f0fe078823d44ad59b3048bb5bc39d8.png)
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解题方法
【推荐1】①函数
;②函数
的图象向右平移
个单位长度得到
的图象,
的图象关于原点对称.在以上两个条件中任选一个,补充在下面问题中,并解答:
“已知___________,函数
图象的相邻两条对称轴之间的距离为
.”
(1)求
的值;
(2)求函数
在
上的单调递增区间;
(3)记
,将
的图象向左平移
个单位长度,得到函数
的图象,若对于任意的
,
,当
时,都有
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4184f9e8c5b684c4ff36e9fe634a433d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4847bfc656a57e90949a6ad92cd6ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdaf49f9611922348aa2784465da614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
“已知___________,函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b19c25a6cf6a3e59196ff48ae94d3dbb.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1613d377a07850c72cbec354b7a3000f.png)
(3)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/beb08e6ca78852cd81618220e80510fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb7df298a9364b36e079a61caec815c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e49794721f5504dd828acf49be37ff42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3f1f8e4bce5f5d753013a11081f9f53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ddf9529ef0f0b6966015c328aafb8db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】已知函数
在下列条件①、条件②、条件③这三个条件中,选择可以确定
和m值的两个条件作为已知.
条件①:
的最小正周期为
;
条件②:
的最大值与最小值之和为0;
条件③:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041155cbd025a876c9fd7c3550d67540.png)
(1)求
的值;
(2)若函数
在区间
上是增函数,求实数a的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38d1c95fc227e07b8268d92f39ccf93e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
条件③:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041155cbd025a876c9fd7c3550d67540.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a37c17c139a6e995fb23547c8864d5.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebaa0d80a0f6975e26b2fb0d91901ba.png)
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【推荐1】已知函数f(x)=4cosωxsin(ωx
)(ω>0)的最小正周期是π.
(1)求函数f(x)在区间(0,π)上的单调递增区间;
(2)若f(x0)
,x0∈[
,
],求cos2x0的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d149d6494edb039646fb153d6cb00bf.png)
(1)求函数f(x)在区间(0,π)上的单调递增区间;
(2)若f(x0)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/642107e1b84376922f934595e4da9755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
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【推荐2】已知函数
.
(1)求
的最小正周期,并求
在
上的单调递增区间;
(2)现将
图象向左平移
个单位长度,再向下平移1个单位长度得到
的图象,若存在
,使得
成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d87d3d511412485c2d4c1c62b98f9a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44d51992c05a557cf6058664f1f8961e.png)
(2)现将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e24f048f9a87274863ba2c037d7a5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd65d7c5e979706d391163aee2c18cb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09ac662f15f6868924eaab3a678cbdf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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名校
【推荐1】已知函数
.
(Ⅰ)求函数
的最小正周期及最值;
(Ⅱ)令
,判断函数
的奇偶性,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50517d151894b403889da2f2815e3b00.png)
(Ⅰ)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(Ⅱ)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d72ffce42d4d012f044a1f2495678c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
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