已知函数
,下列四个命题正确的序号是
①
是偶函数 ②
③当
时,
取得极小值④满足
的正整数n的最小值为9
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3d74bc831a959f5d2a2b016548eba0.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b61adc4745f283e4072ddd762f92ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0997a1b554d2d48d21e55cf46a5e93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a8f646df1ff7fc97fb54ed3b8525508.png)
A.①②③ | B.①③④ | C.①② | D.①②④ |
更新时间:2019-12-11 22:31:28
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【推荐1】已知函数
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知函数
,若函数
的单调递减区间(理解为闭区间)中包含且仅包含两个正整数,则实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6397f3a41b631750dfdc6e50b48d0e.png)
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A.![]() | B.![]() |
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【推荐1】把
的图象向左平移
个单位,再把所得图象各点的横坐标缩短为原来的
倍,再把所得图象各点的纵坐标伸长为原来的2倍,得到函数
的图象,若
对
成立,则
①
的一个单调递增区间为
;
②
的图象向右平移
个单位得到的函数是一个偶函数,则
的最小值为
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③
的对称中心为
;
④若关于x的方程
在区间
上有两个不相等的实根,则n的取值范围为
.其中,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2b9643da0c0fea4f099f9a9133d6076.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce6cc0e2b71c0bbc477f15420d2cfa2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3200e6aa922be0e0675d52c3d799750d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fec2b153baae853850533aee2b5d8b3b.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1f07948e9258b482a2164ac871f90f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a779bc72e99260a531b88acdfbb39277.png)
④若关于x的方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b12ff508a0b321c8c57468509e1963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6232413a655f772f53b7fabbc9c332b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a02c5c46e01d8419b7a810494b4ed6ca.png)
判断正确的序号是( )
A.①② | B.①③ | C.③④ | D.①③④ |
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名校
【推荐2】若函数
的图象过点
,在下列结论中:
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是周期函数 (2)函数
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(3)函数
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对称中心 (4)函数
的最大值是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
则正确结论的个数( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17b9f081e1bd902d328820851ad4029.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a076f1207c62e6593e55d98e9184ed53.png)
(1)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff420ca0d6e2e7d434a933cf6c5792b.png)
(3)函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47c1fad7af7df8e93160cf83788bec5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
则正确结论的个数( )
A.1 | B.2 | C.3 | D.4 |
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