已知函数
.
(1)讨论
的单调性;
(2)已知
为自然对数的底数,证明:对
.参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b1426f9fcbd0914fb595fa0b9fb4ca7.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84953fc3fd4dffeaecab0d4d23aeb48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aee2f300741e30bfe52d26eb307e05f.png)
更新时间:2023-03-22 11:26:02
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名校
【推荐1】已知函数
.
(1)令
,讨论
在
的单调性;
(2)证明:
;
(3)若
,对于任意的
,不等式
恒成立,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6de1adb5457a90fe925c901e67ed57.png)
(1)令
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f710b0b07031d4f691f834ec322f407a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d562dc22dfb3b81d0c3f88b54d063c2f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5a07ada0170431f2a6d5f353447de.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26927f1f0be044942dfce30c3607158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/648fe6a6dea7482ae7e362761e96466a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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解答题-证明题
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解题方法
【推荐2】已知函数
.
(1)若方程
在区间
内有且仅有两个不同的实数解
.
①求实数a的取值范围;
②证明:
.
(2)设函数
的零点按从小到大的顺序依次为
,极值点按从小到大的顺序依次为
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce30917f4f30c79eb1164f16feedf43c.png)
(1)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338316b0fe50fdea0f2f75aec4c990dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb106bdbfc9fe4f82ae8eaa80db66306.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
①求实数a的取值范围;
②证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21cf1974c4f9fd94ad52a5062a1099f8.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3f50584e5e040938569f224e1bebcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/594ece58873a4e5e170c80974a8d24eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17567492ed0e5d9c78396df3e44775c8.png)
您最近一年使用:0次
解答题-问答题
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(0.15)
【推荐1】已知函数
.
(1)讨论函数
的单调性;
(2)若
是
的两个不相等的零点,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc9d4f1303db2cde97361728a97a3441.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4729566a0eeee8ef61514c5472ef3063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13e5c66b641e6f5bfddff5d1997a34.png)
您最近一年使用:0次
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(0.15)
名校
【推荐2】已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50995519a72196a2b357c2d3e23e4ef3.png)
(1)讨论函数
的单调性;
(2)当
时,
恒成立,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50995519a72196a2b357c2d3e23e4ef3.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10902b93957cdf5fafa335000949593e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
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【推荐3】已知函数
(
是自然对数的底数).
(1)讨论函数
的单调性;
(2)当
时,若对于
,曲线C:
与曲线
都有唯一的公共点,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6800f29270ac6c492887f7060f7f745.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
(1)讨论函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8b6894e8c345a035e89ec672503a01f.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93810314c2e788ae6e349759356a59c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fc75239ba05f46f386d67b116e4b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09b29a7faa14a6e09d0db2d04f4ced03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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