已知函数
在区间
上至少有
个不同的极小值点,则
的取值范围是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94973e144c64fca3672593af90609e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c945e6066e4c98dc98e87201030a495d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
更新时间:2019-05-07 07:16:27
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名校
【推荐1】已知函数
.
①若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
___________ ;
②若
,使
成立,则
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e212836c266fee831058c76d4dfba7a.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51eb2613dda00677d447c986cac505bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46626b75bd7bc420bf32b66e3253b40b.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8645952ea14b25443f411d39bdec641e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da3ff8c93bcee1466978fbfe7775a40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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【推荐2】已知函数
,若集合
含有4个元素,则实数
的取值范围是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/805b10ed88b051ee7a56c82fbc2322ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35fc10dcfe1609090f2d90ae29609e5f.png)
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解题方法
【推荐1】关于函数
有如下四个命题:
①
的图像关于y轴对称.
②
的图像关于直线
对称.
③当
时,
在区间
上单调递减.
④当
,使
在区间
上有两个极大值点.
其中所有真命题的序号是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9380c3ca5aa464c302c0d32c95016e7.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec25b105130d71d3d529524671b6218.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e10e1c43b86a8cd4360ca9b57232164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d01dc2d99655cf7598837cb0886166ed.png)
④当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f2c9043ff925c1fb693afd1516dbcf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28e974171c487fed265baaa2043edd9a.png)
其中所有真命题的序号是
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【推荐2】已知函数
在
上恰有3个零点.给出下列4个结论:①
,②
在
上单调递减,③
在
上恰有2个极值点,④函数
在
上最多有3个零点.其中所有正确结论的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/105968cb877c624009f8f93a3ac41ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aebb9595cfebe608e2b3ec06c10421dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e53a882e1821f738fa649e34f42ae861.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41b2037615c3617237fedb67c1ce68fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d45cbcffe6457b264852637c11bec71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6e428ac21635c8ccb90b39df75a8b8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d45cbcffe6457b264852637c11bec71.png)
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