名校
1 . 已知函数
.
(1)若
,求函数
的极值,并指出是极大值还是极小值;
(2)若
,求函数
在
上的最大值和最小值;
(3)若
,求证:在区间
上函数
的图象在函数
的图象的下方.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dda9fe5fbbbfc1741d5c387f26da8d8.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7754cc9374c8193dadb6875fb8a3fefb.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dcdd87d593df4a5c5e98d47fe1cfa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02966b47f20fa9a0eef0c8839412c9a.png)
您最近一年使用:0次
2021-09-18更新
|
426次组卷
|
8卷引用:2015-2016学年江苏省盐城市大丰新丰中学高二上学期期末文科数学卷
2022高三·全国·专题练习
2 . 设函数f(x)=
,证明:
(1)当x<0时,f(x)<1;
(2)对任意a>0,当0<|x|<ln(1+a)时,|f(x)-1|<a.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5238b3fb4653301ea1c2ea541ab1b4a1.png)
(1)当x<0时,f(x)<1;
(2)对任意a>0,当0<|x|<ln(1+a)时,|f(x)-1|<a.
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3 . 已知函数f (x)=
,a∈R.若函数y=f (x)在x=x0(ln 2<x0<ln 3)处取得极值1,证明:2-
<a<3-
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7c461f355cbcdbb7ce5af17d0a9f12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/010d973b8346d9962834c100d625b8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92657b82474d483fbcd0160c0592a179.png)
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2022高三·全国·专题练习
解题方法
4 . 已知函数
,若
证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb3b6c56aee4bb8a8131fd960415c745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c34c590f48c84fe471d1af522c343c59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c5916a9358aa12eb8cec31f26301891.png)
您最近一年使用:0次
2022高三·全国·专题练习
5 . 证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38950e35bd375d9db5761c6716b62033.png)
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6 . 若
,其中
且
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a33b0e40ffc8c916caaccadc71ac414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3163a29235b7a15c6f771f3c35cc068b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8083af8b668a214bc64ebe2519998d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/366b8c8425a3bffab42db02a1dc82e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1497c1350a69d143b7ce1ddef2e6610a.png)
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7 . 求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc907b0743e74043c1bd0ed5309dbdf.png)
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8 . 已知函数
.
(1)讨论函数
的单调性;
(2)证明不等式
恒成立.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0222f84c7cbdba6037abdf8b136c9339.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)证明不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e47805da7fc6a9881f34e603a0ff40e.png)
您最近一年使用:0次
2021-09-14更新
|
500次组卷
|
7卷引用:江苏省扬州市仪征市精诚高级中学2021-2022学年高三上学期9月月考数学试题
解题方法
9 . 设函数
.
(1)若函数
的图像在
处的切线平行于x轴,求a和
在
上的最小值;
(2)当
时,设函数
的最小值为
,求证
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf316d7b9027a4b6827dd92615db727f.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb87c830a03204a5b783ad4c2ba49c4e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a7b7c834d06f3e28a339db94690172.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd0523c2e025e1b9060fd8eb09ac07a9.png)
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10 . 已知函数
(
为常数).
(1)讨论函数
的单调性;
(2)当
,
时,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a592130a23d29bc0daa5c096efecf5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83ba95eeba7889ce1b9210fb535aee70.png)
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