名校
解题方法
1 . 已知二次函数
,满足
,且
的最小值是
.
(1)求函数
的解析式;
(2)设函数
,函数
,求函数
在区间
上的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/331d5e308cd5469e0f28a8d75f79903f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2aeb3ca8cbc4facb2467b1a618f33794.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602baac86c2b1668ecdfadc8a5948885.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12bc8e7be7e034280c6fa1ab34505ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7863b54185da5a3f1a765e1aa0577e76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d28d14f4b25cb7dde8acf4d015e40c.png)
您最近一年使用:0次
名校
解题方法
2 . 已知幂函数
与一次函数
的图象都经过点
,且
.
(1)求
与
的解析式;
(2)求函数
在
上的值域.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85aa71da073447ff2fb2c93fb56d999d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3145c3d42425e8bcd5f5558ba21d1782.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/028517e8bebe634441e0a5c79828e88a.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dc57150db1eb84d8af5da8ab12007ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a84a748968f143ae50d91f392a217b72.png)
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解题方法
3 . 已知函数
(
且
)的图象经过点
,函数
的图象经过点
.
(1)求
的值;
(2)求函数
的单调递增区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a33dc3326e335a7e519b86093a53fb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c400a615a16a1662de98dfb4e49d58d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2be3ad3dd6803d92df6ff8a80cd35095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6597f5221fd66f2ca2c626ec61c8cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9242dd26ba42e906d512542f02807779.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
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解题方法
4 . 已知指数函数
的图像过点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685313bc490951b13de06481f70e21b3.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e786f7887e437328abbd866560dcf3f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/685313bc490951b13de06481f70e21b3.png)
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解题方法
5 . 已知
是二次函数,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6a549b9f819d09f83daa79cbde8d5c.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51eb2613dda00677d447c986cac505bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c292ad5ab432ba87d945d952ae84d2b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6a549b9f819d09f83daa79cbde8d5c.png)
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解题方法
6 . 在经济学中,将产品销量为
件时的总收益称为收益函数,记为
,相应地把
称为边际收益函数,它可以帮助企业决定最优的生产或销售水平.假设一个企业的边际收益函数
(注:经济学中涉及的函数有时是离散型函数,但仍将其看成连续函数来分析).给出下列三个结论:
①当销量为1000件时,总收益最大;
②若销量为800件时,总收益为
,则当销量增加400件时,总收益仍为
;
③当销量从500件增加到501件时,总收益改变量的近似值为500.
其中正确结论的个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9966dfe9109671c587892bd32f0b6699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f485aea0ad3f63c5f9f3c20c79ac08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/858b3ac63bd8652a02904809295cd97a.png)
①当销量为1000件时,总收益最大;
②若销量为800件时,总收益为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
③当销量从500件增加到501件时,总收益改变量的近似值为500.
其中正确结论的个数为( )
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
解题方法
7 . 如图,开口向下的抛物线
与
轴交于
、
两点,抛物线上另有一点
在第一象限,且使
,
的长及
的值;
(2)设直线
与
轴交于
点,点
是
的中点时,求直线
和抛物线的解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30e445cd961ff78314b0994c4dcaa5ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a44d9a0d07ea92292b9559a0f9d0b1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e7e01495050cca64f635c2c2658157.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
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解题方法
8 . 若点
在幂函数
的图像上,点
在幂函数
的图像上,定义
,试求函数
的最大值以及在各个区间的单调性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a950a998c992f4cdf141bd6893261fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7362fa526a84b0ce2f5a2021dbc44399.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae64fa09b4ce3adc4e6f0f4bf30def92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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解题方法
9 . 某移动公司采用分段计费的方法来计算话费,月通话时间
(分钟)与相应话费
(元)之间的函数图像如图所示,则
与
之间的函数关系式为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
您最近一年使用:0次
解题方法
10 . 已知幂函数的图象过点
,当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/081cd41dab0f2a8f84b0e9f1df4843fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de9bb12543a10b43880a0dccbd2bfbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070d1ea22a92808dad7489438c239629.png)
您最近一年使用:0次