已知函数
的定义域为集合
的值域为集合
.
(1)求集合
;
(2)已知集合
,若“
”是“
”的充分不必要条件,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e616852197f0dc2f8ab64d3a246e95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761e3e38f37e098b9333ac89fdb98e7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/731b10c784cd6623415c0470818b6365.png)
(2)已知集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea225a064fea0eaccbf3f4501d96df6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3eb5935678e432e6f1f3180bfdb3175.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e23af61cd402b3789af2401bde9cbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
更新时间:2023-02-18 10:25:04
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【推荐2】已知全集
,集合
,集合
.
条件①
;②
;③
,
,使得
.
(1)当
时,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3f308e88a3790f277977a6248ef78c.png)
(2)定义
且
,当
时,求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06430886275f5ad62bcda62fce691e99.png)
(3)若集合A,B满足条件______(三个条件任选一个作答),求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860ebb6f76cd3cb9a265dfc233002a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/129e27aeb2508b7b7f7c6bdf581f2d1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46dde1ffe87040449708c09cd1ad01a2.png)
条件①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f082e671f4c5cb54b89a72bef325b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd9d50619b779c1056602f46b2a95e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d580f4f639394d9e9f15d43bc5e2b8d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb95a217008447c77e95cd1c20ac7dc0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f333263260646c494225db8a7476c00.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce3f308e88a3790f277977a6248ef78c.png)
(2)定义
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c06e0015b69f02143927309e430dccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20669b603d86512154d7c91a44007e4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed39f5aca78934fb383402433fe549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06430886275f5ad62bcda62fce691e99.png)
(3)若集合A,B满足条件______(三个条件任选一个作答),求实数m的取值范围.
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【推荐1】已知命题
若非
是
的充分不必要条件,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c277d1612b1da8a77b2534bc36ce91e9.png)
![](https://img.xkw.com/dksih/QBM/2011/12/27/1570635179106304/1570635184611328/STEM/ed327b228f5c4280bca4c79768f85bca.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2011/12/27/1570635179106304/1570635184611328/STEM/f0d4fdb5f4d04a41ab379db9b7babf80.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2011/12/27/1570635179106304/1570635184611328/STEM/6f057802a01c417ab8412ba5f98033f6.png?resizew=13)
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【推荐2】已知
.
(1)若
是
的必要不充分条件,求
的取值范围;
(2)若
是
的必要不充分条件,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c018cefaca0af3f20d777b74c9a27901.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30fd5acd3cea0866f64bc80ab4c14e3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9aacc4fa7d44974d18a3fb9e290b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】已知函数
的定义域为集合
,函数
的值域为集合
.
(1)求
;
(2)若集合
,且
,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0303e3c14ee782330d2544f92dc9a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9214c18074bbd53581cf030645d2f711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若集合
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867e3cbd955ebe6f11f2da714ece150a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cca0ce54011a1d02f0eaf81b07bb85c3.png)
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解题方法
【推荐2】已知函数
,
.
(1)求函数
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在
上恒成立,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06d94accdb1056c6c03b1fc33deed162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec93aca6079d4c1a618f660fad907169.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2df44a932c851ed59b9e2288b7ac7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8421f111b3e4bacc18ec9b56a6500d99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】对于函数
,若在定义域内存在实数
,满足
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为“局部奇函数”.
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(2)若
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上的“局部奇函数”,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd1db6c94b94afc372212a81cc1f4dd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)已知二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bdf1da43ba3614b10e000435787d3f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395c2175d91d5eaac4c4b33ecfeb0f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d188ec2580e273ce87e51653a2177ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐2】如图,是一座“双塔钢结构自锚式悬索桥”,悬索的形状是平面几何中的悬链线,悬链线方程为
(c为参数,
),当
时,该方程就是双曲余弦函数
类似的有双曲正弦函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b383983da73f97c0ec7922556b84c49.png)
和
的值;
(2)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70dfa06870da52663bbb4c7e18217dd9.png)
(3)
不等式
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ad2f5a11d7437f506adab0996961269.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d712038d937090679d0e8cee56b47a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b383983da73f97c0ec7922556b84c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7b3d6bb49565cf01620a0259431d7ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1272e4f338038b3b9468cb9ecc06fe26.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70dfa06870da52663bbb4c7e18217dd9.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8d489d153159fcf945322bf0c6761a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3120403a25e9fc836f06a7781d23c6ec.png)
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【推荐3】某市财政下拨专款100百万元,分别用于植绿护绿和处理污染两个生态维护项目,植绿护绿项目五年内带来的生态收益可表示为投放资金x(单位:百万元)的函数
(单位:百万元):
,处理污染项目五年内带来的生态收益可表示为投放资金x(单位:百万元)的函数
(单位:百万元):
.设分配给植绿护绿项目的资金为x(单位:百万元),两个生态项目五年内带来的生态收益总和为
(单位:百万元).
(1)将
表示成关于x的函数;
(2)为使生态收益总和
最大,对两个生态项目的投资分别为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b04659451da1052640543ad21fee472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5a10a081c6dbab61b811baa6619449a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)为使生态收益总和
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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