已知函数
.
(1)若函数
在
上为增函数,求
的取值范围;
(2)若
,
恒成立,求正整数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27bf7f32947fbcca9ff4f88259e7c59.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38ed0083e51235484572f87da42e84bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bad5c8a4e4bad474651c0a61de820ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec6f69e07b6af1744faab4d065cf57f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
22-23高二下·浙江温州·阶段练习 查看更多[2]
浙江省温州市苍南县金乡卫城中学2022-2023学年高二下学期3月第一次月考数学试题(已下线)第六章 导数与不等式恒成立问题 专题六 单变量恒成立之参变分离法 微点1 单变量恒成立之参变分离后导函数零点可求、可猜、不可求型
更新时间:2023-03-15 16:04:25
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【推荐1】已知函数
.
(1)当
时,试确定函数
的零点个数;
(2)设
,若
在
上单调递增,求实数
的取值范围;
(3)设
,若存在不相等的实数
,
,使得
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc8ca8ea93e01e9e0f0c3e4aa5425448.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab539ceb4a51f14b06dced781a56e055.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14423a12f7f8d3125da44cd9be25036b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04f5684d862b1be1f8883838fa93b37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af1dcdfce4e67213937b00a44b0c8412.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2492d486aef92677bc4d9c88c28b6845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ed4a292f37d53e6d519d5c70b898e8.png)
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【推荐2】已知函数
,
.
(1)若函数
为定义域上的单调函数,求实数
的取值范围;
(2)若函数
存在两个极值点
,且
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1355b61e1017a4dfeb61b4d2b67e5f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1debd094d7bbdef7548594b98a590fe2.png)
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【推荐3】已知函数
.
(1)若函数f(x)在(0,+∞)上为单调递增函数,求实数a的取值范围;
(2)若函数f(x)在x=x1和x=x2处取得极值,且
(e为自然对数的底数),求f(x2)-f(x1)的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fbb0492ee449fd4fb706a8b249fc91.png)
(1)若函数f(x)在(0,+∞)上为单调递增函数,求实数a的取值范围;
(2)若函数f(x)在x=x1和x=x2处取得极值,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa8e2a444581ea2f08d4b05b5d8e624.png)
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【推荐1】已知函数
.
(1)若
,求
在点
处的切线方程;
(2)若
在
上恰有一个极小值点,求实数
的取值范围;
(3)若对于任意
,
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c961031fb41532482ebabd6aba8cba.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若对于任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ad8175214b7ae238425e65c09a2db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb4bc53cbd5f20420804cd48a67ab6a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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【推荐2】已知函数
.
(1)讨论
的单调性;
(2)证明:当
时,
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932c96b25a9976255dfc9101c8dba2bb.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e189dbc979fad6bf8ca03ac1388cbac0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c0bfb89b0b75df83380c9a813b5aea.png)
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【推荐3】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c246c8269dc0c9d00392985a819633ff.png)
(1)如果对任意
恒成立,求实数
的取值范围;
(2)设实数
的两个极值点分别为
判断①
②
③
是否为定值?若是定值请求出;若不是定值,请把不是定值的表示为函数
并求出
的最小值;
(3)对于(2)中的
设
,试比较
与
(e为自然对数的底)的大小,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c246c8269dc0c9d00392985a819633ff.png)
(1)如果对任意
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d854ad41140c24259bf11657b52801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44e7b5087a19217eb128cf696c5850f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fc6697cd354efa70c2842cefbfe577f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb52d6ea630bb32f53cb4f57861eefb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a95085d0d795c011727ff6be4e6574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7b7c834d06f3e28a339db94690172.png)
(3)对于(2)中的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a95085d0d795c011727ff6be4e6574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c7ef08981f569f030869007fbe3c52f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0e396976cb02b30264911e45fc02d50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5649c9b3bf97ec12142630588dfe18f9.png)
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