解题方法
1 . 某呼吸机生产企业计划投资固定成本500万元引进先进设备,用于生产救治新冠患者的无创呼吸机,需要投入成本
(单位:万元)与年产量
(单位:百台)的函数关系式为
,据以往出口市场价格,每台呼吸机的售价为3万元,且依据国外疫情情况,预测该年度生产的无创呼吸机能全部售完.
(1)求年利润
(单位:万元)关于年产量
的函数解析式(利润
销售额
投入成本
固定成本);
(2)当年产量为多少时,年利润最大?并求出最大年利润.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fa3aa881aa0d491b5479b3affd059af0.png)
(1)求年利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4669810732b633b60dbeaf0bf57204f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
(2)当年产量为多少时,年利润最大?并求出最大年利润.
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解题方法
2 . 已知函数
.
(1)计算
的值.
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71f34c85990e08cb3c802d1b0ba7d8c.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e2cd127e77564966df0611c41c2970.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ba63023e6e5cf3bd202d53259640b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6500bd2a4ae36511d44eb5970ad9340f.png)
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解题方法
3 . 求下列函数的定义域:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180dcbaaced853eed1782b4e773d3aac.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1deb9817fe833b19bef31302dd5c039c.png)
(3)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/180dcbaaced853eed1782b4e773d3aac.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1deb9817fe833b19bef31302dd5c039c.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31012e990dec95759c8362cff951eda9.png)
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解题方法
4 . 已知函数
为
上的增函数,则满足
的实数x的取值范围是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61b569c49152029cda5db24606fefb7f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
5 . 函数
是定义在
上的偶函数,且
,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43b2faa4f81f32d94612dce724e772b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b3b657ebd1733b4f19dcbec44919924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec9bd1a9ac4fc2c207811c3bf1b4be4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad69e072416bd6c6118f619a5d102964.png)
A.0 | B.1 | C.2 | D.4 |
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解题方法
6 . 设函数
.
(1)求
及
的值.
(2)解关于
的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4a3090c6ece0599e9e0f3b31497353.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b221602acddb577c42063957b7e45f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2fb17436d1ab0e44408d1f460356df3.png)
(2)解关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5b562ca77fa64f3ebe40e0ad49833d5.png)
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解题方法
7 . 已知函数
.
(1)判断函数
在
上的单调性,并用单调性的定义证明;
(2)若
恒成立,求实数k的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2117ad93e0cd89fe65509588fc5c7a.png)
(1)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bae77d068877bc3c7625025ae242f858.png)
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解题方法
8 . 已知
是
上的奇函数,当
时,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/417ab20883d799aaf311371393fa7d7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1376168658dbe7f5b7f4d75fb1db545a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29360e4913490c51714090e91351eb67.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
9 . 已知
是二次函数,
在
处取得最小值
,且
的图象经过原点.
(1)求
的表达式;
(2)求函数
在区间
上的最大值和最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d69c8147dd7b7c1a46739e30c595fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23c33b69adc112831fa115b5dffdb616.png)
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解题方法
10 . 已知定义在
上的函数
.
(1)求
的值;
(2)判断函数
的奇偶性,并证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7630110d5583d6f49a4c7fb2e597db.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb71ad742b421a7ba62d8c1923d33358.png)
(2)判断函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
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