1 . 人们发现,可以通过公式
来求方程
(
均为正实数)的正实数根.例如,方程
的正实数根为
,我们知道
是
的唯一正实数根,所以
,这里规定
.根据以上材料可得
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d63ca557a72dca6d8e6fd1292cc938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bd63762e6bc365c2fa3f9c2387e46c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cd5371a6f0f82c65dd22f75f8b807c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad71356dc416a3d67dd0287fe1d08c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b863de54fe9b9d5191d23ff8e23ac42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f23d29646155e27b172ecdf263e2d702.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad71356dc416a3d67dd0287fe1d08c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd779c16bcc1a432eee1bb797faea3c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d70c1b3cd248c4d0c6c900dae59bc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fddef4c3aade36a03ea32ba7ae8633a.png)
A.3 | B.6 | C.9 | D.4 |
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2 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727088002886910f1b8bff4492c8f453.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fa0035770a41d223aadf0a1c5e186b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/727088002886910f1b8bff4492c8f453.png)
您最近一年使用:0次
名校
解题方法
3 . 已知函数
.
(1)若方程
的两根为
与
,求
的值;
(2)设函数
,若
的最小值为1,求实数
的值;
(3)设函数
,记
为
的反函数,设函数
,当
时,
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e7c1e306fe3124dc730b2f8f681bdd.png)
(1)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/124f5d03ab9692ef07f1ad6913e4b0e7.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/450398974b1561ca801e102e16df6789.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/489c86eac6482ddbc9d704b0debb4c20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ec52b67f780fa3f0eff0197a20a17b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686a0e76d6c06d4a507e47833eaa5755.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02f196f6236188084f3b2c9f2b68c05c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a34a33d135646e1b7581ecac91fbcffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9907849f70ca76e2d5cc80b5ced07452.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e8380ca790c38c3ebae35965834016f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2024-01-20更新
|
313次组卷
|
2卷引用:辽宁省大连市2023-2024学年高一上学期期末考试数学试卷
名校
4 . 已知函数
(a>0,且
)在
上的最大值与最小值之和为20,记
.
(1)求a的值;
(2)求证:
为定值;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da53929a8f67b9aa3827fdbd73ebd265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7242b2ab643f9470da77e29d043b893.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/332170b3de3d5f530b38d60a5ff4b775.png)
(1)求a的值;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3caaf39cc15fc52ecae71ac5bc0e1c5.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae11536b72fd8de5c4611b1c10472675.png)
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5 . 已知函数
的图像与过点
的直线有3个不同的交点
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb8bc05239ce28154c70176e3d781c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/455ba3d3e46977fcbe5b71f8bb9df4be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2852ae85cfcc804b3192ea8543c88938.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1947266946e35d8f997e6572c27ac6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d903a6a7837d163f953ba57ae17825.png)
A.8 | B.10 | C.13 | D.18 |
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