设函数
.
(1)求
在区间[1,2]上的最小值;
(2)证明:对任意的
,都有
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aba85786b472f74c5559ef8951ce2c55.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)证明:对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/966b60302d80d8613675bb3dd5c03164.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59f80b3b91e59d92f85e21992c3ff59a.png)
更新时间:2019-11-21 09:55:07
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适中
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解题方法
【推荐1】设函数
(
是自然对数的底数).
(1)求曲线
在点
处的切线方程;
(2)令
,证明:当
时,
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f082e279ea02c6b88bf609990b39e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)求曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bea9227dd0104da58e0c40952cc87ed.png)
(2)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e0b0edfd58e41e86acbd57537f547e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c51d794e87a942737ecd551506f5024.png)
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【推荐2】已知
,函数
.
(1)讨论函数
的单调性;
(2)若
是
的极值点,且曲线
在两点
,
处切线平行,在
轴上的截距分别为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bbdef421c976962a270a2beabbad91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddede6227a2b19c6879a162597508c2d.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fb143809ab6388a504d125149fe7afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be7eb47ee7ef5265b4ccd6b1d4a46de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2bc85af36f64be115dd7c5d88fac6a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f12c60294fc2faefcf22ab41369d6a.png)
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【推荐3】已知函数
,
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、
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(1)若
,点
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(2)若
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的上方,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7317a23748683d3b9ee5ce149d40701a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e0e0904b24afd1d455c637ef8de9e7d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d32d1a5a0732c7e4af737555e44ff9.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fed487c0befbc23bc5a885bcdd6c755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbbb4726a619e54f0bc53e3e4d6c8976.png)
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【推荐1】已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1fa33e23d65dd5c2e4a1085d290a36e.png)
(1)若函数f(x)在
的切线平行于第一、三象限的平分线,求m的值;
(2)讨论函数f(x)的单调性;
(3)若f(x)恰有两个不同的零点
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1fa33e23d65dd5c2e4a1085d290a36e.png)
(1)若函数f(x)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d29c5c266a6d834a244c1f50c8f9848c.png)
(2)讨论函数f(x)的单调性;
(3)若f(x)恰有两个不同的零点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec6ab1369b3e4b71089946e8a434246e.png)
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【推荐2】已知函数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d35712cee6fe679ded00dabc78dffa9.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a37a59558292ad6b3d0978bfd7484990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d33c1fe7be3e966a86d0aa931a3241dc.png)
您最近一年使用:0次