1 . 称一个函数是“好函数”当且仅当其满足:
(1)定义在
上;
(2)存在
,使其在
、
上单调递增,在
上单调递减.
则以下函数是好函数的有______ .
①
, ②
,
③
, ④
.
(1)定义在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
(2)存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1e934b4f6f2c5bc72078c19eb6805db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a83327f6e116a33eeb679ab0b9264ad9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
则以下函数是好函数的有
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a493c2f6962d18fd19a8e3bb290f2a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6250e92e9fa560c34ae11ed87d68db7.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164b346342a187a9998a98ab752a4c55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c58c630e883c50c429ff4ad63951934.png)
您最近一年使用:0次
2011高三·天津·竞赛
2 . 若直线
与曲线
相切,则实数
的值是.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e235d7dd12f948f5ffb2e5afddc95612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba1824dd82c5eb8d1eeec488f6b5b74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.-4 | B.-2 |
C.2 | D.4 |
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3 . 设
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d320754dd8ea7a80cace093f2492184.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06199191b35bfc0084803dd718177542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d320754dd8ea7a80cace093f2492184.png)
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4 . 若
,则
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d3210b447931379c30456fe92cde94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次