函数
,其中
,
,为实常数
(1)若
时,讨论函数
的单调性;
(2)若
时,不等式
在
上恒成立,求实数
的取值范围;
(3)若
,当
时,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2074d9212fe631bd421f514d8ac3fc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/256f3981024e53f373a80aad40e994ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaae91ed6da60e86e3bb9b3eb7e03e60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88595a898f2848c54f0fb32c3338950b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c598d9af33139205c69a18297e43c2ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/635e49a5da8d3d6397713f372bf85402.png)
2019·陕西·高考模拟 查看更多[4]
(已下线)【省级联考】陕西省2019届高三第二次教学质量检测数学(理)试题2019届陕西省西安市高新第一中学高三上学期期中数学(理)试题陕西省西安中学2019-2020学年高三上学期第三次月考数学(理)试题吉林省梅河口市第五中学2019-2020学年高二5月月考数学(理)试题
更新时间:2019-03-20 18:06:27
|
相似题推荐
解答题-问答题
|
困难
(0.15)
【推荐1】已知函数
,
.
(1)当
时,求函数
的单调递增区间;
(2)若函数
只有一个零点,求实数
的取值范围;
(3)当
时,试问:过点
存在几条直线与曲线
相切?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9858f90fff7f092a5237e20d934aae27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7326ea56be82bd616fec7e6aa3c884c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d56ab70e602f2e2e291df643ab209162.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
解题方法
【推荐2】已知函数
.
(1)若函数
为增函数,求实数
的取值范围;
(2)设
有两个不同零点
,
.
(i)证明:
;
(ii)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6894e39d6567a6f9d3aaa653da65a551.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c24d5d082f51c93bd35a423796a742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
(i)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb84b3b33fa3174cfbc6a7802303c2d6.png)
(ii)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a2c06d2c1bd79ce48e65d5b42a3c56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae0741d5b68bdb629b48247c5ecb5b7.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐3】设函数
.
(1)若
,求函数
图象在
处的切线方程;
(2)若
在
处取得极小值,求
的单调区间;
(3)若
恰有三个零点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf6fdad1cdc364ca0134e3b36a50a73e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐1】已知函数
.
(1)若函数
过原点切线的斜率是
,求实数
的值;
(2)若
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67f8331767ab90c19d730857709578ee.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4d4fd38e874a76396597cfa457d058.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
【推荐2】已知函数
.
(1)讨论
的单调性;
(2)设
的导函数为
,若
有两个不相同的零点
,
,设
;判断p与2的大小,并给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fc07ada99b70b549221a1bc356245c5.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/724340d69477c0ec2418c392b22b1cab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.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/2710db49e65d16762aeef74d21f1f0b4.png)
您最近一年使用:0次
解答题-证明题
|
困难
(0.15)
名校
解题方法
【推荐1】已知函数
,
.
(1)讨论f(x)的单调性;
(2)若
时,都有
,求实数a的取值范围;
(3)若有不相等的两个正实数
,
满足
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7817249af2fbf9e1d13063f9895d35d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1e69392d21261afd8e5e5f096634669.png)
(1)讨论f(x)的单调性;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58c42e45bc400005ae79eeb2e42d11b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c2e0bb6d63b7bcaee92a470d58cc399.png)
(3)若有不相等的两个正实数
![](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/a83165b3b873874a455d238c6d758b94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034a7b9af131e4514d8ffff924b7bc91.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
名校
【推荐2】已知函数
.
(1)若函数
与函数
在点
处有共同的切线
,求
的值;
(2)证明:
;
(3)若不等式
对所有
,
都成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64263fe2ca48e694c87496d61e63fb9f.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a7772dacce9e7c7bc85b085036f01c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de624ef08ab0043a976aa9739a92c9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/022dc6dc89a940eaaabfb8dcf0b4fb66.png)
(3)若不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a207c58782d151a3c73ee284309af6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/749f3c4b0c1e9301573e7a7df99cc410.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/225504e566da119bb27468d88b7443fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
您最近一年使用:0次
解答题-问答题
|
困难
(0.15)
【推荐3】已知函数
.
(1)若
有3个零点,求a的取值范围;
(2)若
,
,求a的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3315173cad088fff5ebfe827b839ebee.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e2e79843faf62dde86bf858d1e0569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936654c9cbaf277ffaf95a248ad1443d.png)
您最近一年使用:0次