已知函数
;
(1)求
的最小值及对应的
的值;
(2)若
且
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e258c3f728e5c3503cfbde7fff9d4d9d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc4679a8360516b33a3cb9e86ab25b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81d6d161e8eb824b07162c57528dac46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6544c32c90da1c9e5fcaab67cb740e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2020-02-29 19:52:22
|
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适中
(0.65)
名校
【推荐1】已知二次函数
(
均为实数),满足
,对于任意实数
都有
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.
(1)求
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;
(2)当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd53e5d21d735d3d2dfb6ee01ec2650c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74156327e5659301f391814605688899.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f17d9b0379b2b27da73d525d61de9093.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75bde2e500fd5386e355db9040a1946d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/434e938638cced59180fb39abbf78b95.png)
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【推荐2】已知函数
.
(Ⅰ)若函数
在区间
和
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(Ⅱ)若
在区间
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12cdd67c671738a30db5a0bcc8ea3a44.png)
(Ⅰ)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4db5cd35afd7da6256efa25c61c7341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc1442ebaaec5108968f50cb631a40e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34bdf025f6472f99b0aa8849bbdcafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/422f50cbfa9dafb8fafeadd8a5f81aeb.png)
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(0.65)
【推荐1】已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872032015d250de35c17e97f278c1bde.png)
(1)若
,求实数m的取值范围;
(2)是否存在实数m,使得“
”是“
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/872032015d250de35c17e97f278c1bde.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36643962da3015d1f24c7fbee63f0d4b.png)
(2)是否存在实数m,使得“
![](https://img.xkw.com/dksih/QBM/2015/10/8/1572244741292032/1572244747067392/STEM/e8cb541cf42348f7a7120604f774dcc9.png)
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解题方法
【推荐1】已知实数
且
,函数
,
.
(1)已知
,
,求实数
,
的值.
(2)当
时,用定义法判断函数
的奇偶性.
(3)当
时,利用对数函数单调性讨论不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf4acda1e0011623694bbce558f99240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c383561ca3377c5ea03771c6ccacf02.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc53d7bd9897a2eedd1862500b575b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed57d79c717fc8cf7ede3d9995c98359.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0086b054ef120408acac806a1b1318.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78c204be088a8fc6c096eedd5b1e7dc7.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7a1d739890a8951586e23b78b035bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ed9438ae4a904513246620ab76403d.png)
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【推荐2】已知函数
),当点M(x,y)在函数g(x)的图象上运动时,对应的点
在f(x)的图象上运动,则称g(x)是f(x)的相关函数.
(1)解关于x的不等式
;
(2)若对任意的
,f(x)的图象总在其相关函数图象的下方,求a的取值范围;
(3)设函数
,
,当
时,求|F(x)|的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e895781df02579180c66ec765c81a608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a96504c1431c94b4c8eebe15d829ae.png)
(1)解关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c2e0bb6d63b7bcaee92a470d58cc399.png)
(2)若对任意的
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(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4633de9335d15d7685bdecb007a3678c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
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