已知函数
,
.
(1)当
时,
①求
的极值;
②若对任意的
都有
,
,求
的最大值;
(2)若函数
有且只有两个不同的零点
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccfceec6ed0a6f0215dab88ce14d510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
②若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3ea46bcfd4d1ade2e65f8b28b7f7e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf7367b796f1dcf37151e6fd25c1353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/087a2f041ebb11dfaccfa685ba67410f.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/d3661dbd3b2c578c685e6a11a4102ddd.png)
2022高三·全国·专题练习 查看更多[5]
(已下线)专题4.9—导数大题(双变量与极值点偏移问题1)-2022届高三数学一轮复习精讲精练新疆喀什市第六中学2022届高三上学期期中考试数学试题(已下线)第08讲 双变量不等式:转化为单变量问题-突破2022年新高考数学导数压轴解答题精选精练湖北省重点中学沃学联盟2021-2022学年高三上学期期中联考数学试题江西省景德镇一中2022-2023学年高二(19班)上学期期中考试数学试题
更新时间:2021-07-31 08:21:16
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解答题-证明题
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【推荐1】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61a6ebc0e623618e5f1e32fa62ac8707.png)
(1)求函数
的极值;
(2)当
时,判断方程
的实根个数,并加以证明;
(3)求证:当
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,不等式
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(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f41c6b9fa72109ba69163a5c6b7874a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9587df831df1af5e7dd6be5fdc7bd8ce.png)
(3)求证:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4292ca526c4b7419d5e3cb9794639d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447d6f62c09c1d05346fd16a24159f6e.png)
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解题方法
【推荐2】已知函数
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(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6d5c25aecabfabdf9af645e2c955d44.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5061224628b05c0a23da09c003f7c782.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9da785604605f9af11b329328542aa.png)
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【推荐1】已知,
,函数
的导函数
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(1)若
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;
(2)若
.证明:当
时,
.注:
是自然对数的底数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef4de3ed9387f6aa160f83cd7cdf41a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e991b380038e39e433d509b29b3e663b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ea2b9463344a987ac4fb6a4cd41642.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74de2e60868ff096493144d917a27298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef1a81640e00432f001fc6351c11a50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c171ac0c34469522852cb7fe4312d19e.png)
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【推荐2】已知函数
,
(
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(2)当
时,求证:
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(3)求证:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0065931c3a413381af62ab1761c6d29a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)求函数
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(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ede78fd7ac619ea597856254bb5d75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e9c599e8d420006448905acec2b8234.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cac657ea5bbf4b237a30e4074c76cc81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50bfaec22abb420afe966395b1664a3.png)
您最近一年使用:0次
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名校
解题方法
【推荐1】已知函数
.
(1)求函数
的单调区间;
(2)当
时,
恒成立,求实数
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(3)设
,求证:
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291feeb316f443095a193929fe10adda.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5c837522a811402efb9762210c5362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e145b6046bc80d0ffecc61ac67c87ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a439736edeb1e10ba329b0ed8e289e.png)
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(2)若
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【推荐3】已知函数
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