已知函数
.
(1)求证:函数y=f(x)在(0,+∞)上是增函数;
(2)若f(x)<2x在(1,+∞)上恒成立,求实数a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c64353879d7ca5b30ba715a1f57664bd.png)
(1)求证:函数y=f(x)在(0,+∞)上是增函数;
(2)若f(x)<2x在(1,+∞)上恒成立,求实数a的取值范围.
2019高三·江苏·专题练习 查看更多[3]
(已下线)学科网2019年高考数学一轮复习讲练测 2.2函数单调性与值域 【江苏版】测(已下线)2019高考备考一轮复习精品资料【理】专题五 函数的单调性与最值 押题专练(已下线)2019高考备考一轮复习精品资料 【文】专题五 函数的单调性与最值 押题专练
更新时间:2016-12-03 01:57:59
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【推荐1】教材87页第13题有以下阅读材料:我们知道,函数
的图象关于坐标原点成中心对称图形的充要条件是函数
为奇函数,有同学发现可以将其推广为:函数
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(1)利用上述材料,求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a7083212ae2d09038ff3efa78ca05b.png)
(2)利用函数单调性的定义,证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a7083212ae2d09038ff3efa78ca05b.png)
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【推荐2】若非零函数
对任意x,y均有
,且当
时,
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(1)求
,并证明
;
(2)求证:
为
上的减函数;
(3)当
时,对
时恒有
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d752d8db8a05b3ec7312f6ac8b64a07.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e38fffbc7ab9882480f4faa72390e23.png)
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(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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(3)当
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【推荐3】已知函数
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【推荐1】设函数
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【推荐2】已知函数
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