设函数
.
(1)求不等式
的解集;
(2)若函数
的最大值为
,正实数p,q满足
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05c2b129259544644b5220805a9d2e51.png)
(1)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66d61d5f66d68b4c4a2a25fd7103621.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc63d1efc6b7cbfa6109155246d1fd1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58f8795e8921fd1cefdf38ea0190211.png)
更新时间:2022-12-13 15:22:45
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【推荐1】已知集合
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.
(1)求
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(2)若
是奇函数,当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65ec2b4316366df30cbffd4da3869d04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4ddba9681d93a4675987e0b36d82293.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd492d001a460384ca5c5ad7211561f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a479511a50da604b2fc7398617db8387.png)
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【推荐2】古人云:“北人参,南三七”,三七又被誉为“南国神草”,文山是三七的主产地,是“中国三七之乡”.通过对文山某三七店铺某月(30天)每天销售袋装三七粉的调查发现:每袋的销售价格
(单位:元)与时间
(单位:天)的函数关系近似满足
,日销售量
(单位:袋)与时间
(单位:天)的部分数据如下表所示:
(1)给出以下四个函数模型:①
;②
;③
;④
.请你根据上表中的数据,从中选择最合适的一种函数模型来描述日销售量
与时间
的变化关系,并求出该函数的解析式;
(2)设袋装三七粉在该月的日销售收入为
(单位:元),求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a895cdbde98152f16c919b87916c18fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e593828316139a54019e352dec883f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![]() | 5 | 10 | 15 | 20 | 25 | 30 |
![]() | 50 | 55 | 60 | 65 | 60 | 55 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf8e1983997365bcaee06645ec177852.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd288162a90263f45ea43c66d5a9477b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97ab30aafac9fc7e02f3488a3695321a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d606223d43ced291d796c205017f9936.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)设袋装三七粉在该月的日销售收入为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826308511448f7b791edf4199c690768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826308511448f7b791edf4199c690768.png)
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【推荐2】(1)若
,求
的最小值,并求此时x的值;
(2)设
,求
的最大值,并求此时x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adc3e5be1796493161a4df7e28a6f6b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2baf22aebfcb41351dd7748ca4690db.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fecaefda8567646f10d76668293d845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66672c48b80ed98bf30abb12d0604222.png)
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【推荐1】设函数
.
(1)若
,求
的取值范围;
(2)若
,在(1)的条件下,记
的最小正整数为
,且正实数
,
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2dc1ccc320976a4ae5b0425fe6b8a9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c0993500d9c4784c57845d57647d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/779aafbe0e6b299ccd5af3e4de5a2732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a303bf7a5a44f602738510defca840c0.png)
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【推荐2】 已知函数
.
(1)解不等式
;
(2)记函数
的最小值为
,若
,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4d823c3deb0d10dad0cb975affdfc3.png)
(1)解不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fbc901cbdb68130ddac3174583dd93c.png)
(2)记函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdcc21ccb2d102f8ac15358e68279a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baca30d4248a82988890bd032d159b25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0694fc8fb6de3b076effd2d6134d34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd4067a19eeb07474557fe7b2508880.png)
您最近一年使用:0次
解答题-问答题
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较易
(0.85)
解题方法
【推荐1】(1)已知
,
,求
的取值范围;
(2)已知正数x,y满足
.
(i)求
的最大值;
(ii)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620a6c0dd68965305f065ddd135266b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8723d05e1ee346ef2a362e071fe76666.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b0113fd4c7d157757571f9a009e02af.png)
(2)已知正数x,y满足
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2436951e9a6f5ca0fc0ae65b9d787119.png)
(i)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f29d5f376c75c41ae6af0c8a8565449.png)
(ii)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b7e12253044b5abff2a56dcd730ced8.png)
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【推荐2】(1)已知
,
,且
,求
的最大值;
(2)若正数
,
满足
,求
的最小值;
(3)已知
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d676a58fa4d7c4e8985b85c033495c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18f0281e6bbdbe08beeccb55adf84536.png)
(2)若正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d57df333b2783a9d7eacfa8cf6c81c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c3836619ba47499fca6df4e5182da9d.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec634253b37d452172cfa39030753184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcb6ea431bc38718c156d3866f83bf1.png)
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