名校
1 . 设
,若
对一切
恒成立, 给出以下结论:
①
;
②
;
③
的单调递增区间是
;
④函数
既不是奇函数也不是偶函数;
⑤存在经过点
的直线与函数
的图象不相交.其中正确结论的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b164a9d27ed8d2fa0e8cbe942361f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c999aab899a279d88babdb67e1102ca3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41d9d94b7bb4b7937ee85ff299d12654.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2fc74b7dc3a371f7e309ad9b45b2ada.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8eef90f714db255cab393dfd7e275901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00895a9bbbedce5f8a705d2dd5efbd2a.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
⑤存在经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4562f3225c98cf5cb11b47d98c9cc9c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
A.1 | B.2 | C.3 | D.4 |
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A.1 | B.2 | C.3 | D.4 |