已知函数
=x2-2x+b的自变量的取值区间为
,若其值域区间也为
,则称
为
的保值区间.
(1)若b=0,求函数f(x)形如
的保值区间;
(2)若函数f(x)的保值区间为[m,n]
,且f(x)在[m,n]上单调,求实数b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)若b=0,求函数f(x)形如
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3855c27192074944b12bd6ea778aba51.png)
(2)若函数f(x)的保值区间为[m,n]
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/881f58ceb353ccd4d690e442a9c47877.png)
21-22高一上·湖北黄石·期中 查看更多[2]
更新时间:2022-04-01 09:23:59
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