已知函数
.
(1)讨论函数
的单调性;
(2)已知函数
的两个极值点
,若
,①证明:
;②证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e5e91254b8cca60c777ec8c1d64351.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8290462833d49f09c644c9113ed1d476.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/347c62b44fae618a37c145b3b5d1f1db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ea366f1b3e38506c5aa54dbd9d2484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749be304702f35bb2a7bb75bc381a080.png)
19-20高三·广西玉林·阶段练习 查看更多[4]
广西玉林市2019-2020学年高三第一次适应性考试数学(理)试题广西南宁市2019-2020学年高三第一次适应性测试数学(理)试题(已下线)专题21 函数与导数综合-2020年高考数学(理)母题题源解密(全国Ⅲ专版)黑龙江省佳木斯市汤原县高级中学2022届高三上学期期末数学(文)试题
更新时间:2020-04-15 16:16:27
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解答题-问答题
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较难
(0.4)
解题方法
【推荐1】已知函数
.
(1)讨论函数
的单调性,并证明当
时,
;
(2)证明:当
时,函数
有最小值,设
最小值为
,求函数
的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfec5488d05755fbe05fe23b708cc790.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a7e4dcebd24c843379926de9c0b780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeec5d8e5e0f8a8f9581fa9474329232.png)
(2)证明:当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51ac29bf13dd0ecd09f6cd33f7c85f29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdd0ff6a3c7327b1887b92e3f8101f50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a90170d7ef5ff6d1d63517c166f7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a90170d7ef5ff6d1d63517c166f7a9.png)
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(0.4)
【推荐2】已知函数
.
(1)若
是
的极值点,求a;
(2)若
,
分别是
的零点和极值点,当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6069beb91e527c1341724088bfd00a1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880a0146023767282bffe07f7c22f613.png)
您最近一年使用:0次
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(0.4)
名校
【推荐1】已知函数
为
的导函数.
(1)求函数
的极值;
(2)设函数
,讨论
的单调性;
(3)当
时,
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6283bfe3191224b1727d1e45ba33193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d11aedf5ef62d3b426f6d545cc6c75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e61ab2e1ed067dff9212971b64950d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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(0.4)
【推荐2】已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93938b1aaf982363c92e6f8c7763336e.png)
(1)若
,求曲线
在点
处的切线方程;
(2)讨论函数
的单调性;
(3)设
,若函数
有两个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93938b1aaf982363c92e6f8c7763336e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c9f8845aa2b51c460f2d798c9f62fa3.png)
(2)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44b5e079cc2b61d1165435852ab3a64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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