函数
(其中
)的增区间为______________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30223d7ae6922d59ae7d378d357d65f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6eec7d75a66a4407631f75320bb8b15.png)
20-21高一上·江西·阶段练习 查看更多[2]
更新时间:2021-01-09 22:46:55
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【推荐1】若函数
在
上是单调函数,则实数k的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2cbf7690fec34c7bd0c8fc23cfe135a.png)
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【推荐2】对于实数
,用
表示不超过
的最大整数,如
,
,若
,
,
为数列
的前
项和,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae9ad4e59d7081cf19021423a984bc29.png)
__________ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97dd5cf477848d20e1ff26353f4614a7.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐3】已知函数
.给出下列命题:
①
是偶函数;
②当
时,
的图象关于直线
对称;
③若
,则
在区间
上是增函数;
④
有最小值
;
⑤若方程
恰有
个不相等的实数根,则
.
其中正确命题的序号是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f249d0e265e6a33f112742d19cda4b.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90273593dca08da1b9e33e3a8663c514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c8e281e0aebdba052969bf11cf86430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329ec385c8e3745bf70c3138fa288788.png)
④
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da97eb6b168e0f025b8eaa810e3574cb.png)
⑤若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/515f88ff8fa1cad560307bd2b2e13fcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
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其中正确命题的序号是
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【推荐1】若函数
的定义域是
,则函数
的定义域为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
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【推荐2】某数学小组以函数
为基本素材,研究该函数的相关性质,取得部分研究结果如下:
①函数
的定义域为
;
②函数
是偶函数;
③对于任意的
,都有
;
④对于任意的a,
,都有
;
⑤对于函数
定义域中任意的两个不同实数
,
,总满足
.
其中所有正确研究结果的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97d44c9fbbc4f7810ba9525fb5d0f577.png)
①函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc30165c18de623d0a3efb961e606d1c.png)
②函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
③对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998d1117b68d345ad988e86d1ec7724b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3543b9964b4ae5cf2b4012fd3fba62c8.png)
④对于任意的a,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3366c6ea946d2ac63f32c38b559a8758.png)
⑤对于函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
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其中所有正确研究结果的序号是
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【推荐1】函数
的单调增区间是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13448cf0fbed175d8ab8ed97b0e0f45e.png)
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【推荐2】已知函数
在
上单调递减,则
的取值范围是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0166a8e72cb39476bbdf64e29ab89b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c47acdaa7db189fa7b579edbadaf115d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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解题方法
【推荐1】函数
的值域为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d72f110156c49064ad794e32e7305fb.png)
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【推荐2】设函数
,若存在
,使得对任意的
,都有
成立.则关于
的不等式
的解为________ .
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571973809381376/1571973814738944/STEM/c07d8bb822324cd9b26913db4e4c35c2.png?resizew=107)
![](https://img.xkw.com/dksih/QBM/2015/1/28/1571973809381376/1571973814738944/STEM/1f7687a6c5464808826d6441e383c1eb.png?resizew=48)
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