已知二次函数
满足
,且
,
(1)求二次函数
的解析式;
(2)设
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42a82c65ed379d45f5f2fc8887970e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51eb2613dda00677d447c986cac505bc.png)
(1)求二次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d9703ec5eee8074ba7fbe0e899b336.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
更新时间:2021-12-22 08:02:34
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【推荐1】已知函数
,且
,
.
(1)若
,求
的解析式;
(2)若
是偶函数,求
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(3)在(1)的条件下,证明
在区间
上单调递减.
(4)在(1)的条件下,若对
都有
,求实数
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24ef4ef276f01e0adc13d76484c66cb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ed670b1f668778c6243f3f7470ee7d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241553167658572549705dda8cd7c207.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a783088120d67cc98936081e80fb7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(3)在(1)的条件下,证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53f59a84526646f8d6f5fccb3796f654.png)
(4)在(1)的条件下,若对
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d4abb29dd2bb3caa856ec6b4e76749c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c75c7392022ea49988cb19fdc7226e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】(1)已知函数
是一次函数,且满足
,求
的解析式;
(2)已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b199cbc9c7692da75844312a6ca96031.png)
①求
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4541abc8536c81bd09c8607060d8f050.png)
②若
,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb041be51c5cf948d6362170c031a58a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b199cbc9c7692da75844312a6ca96031.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d451461c1c7c22a5f3fd8a391b0d7a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4541abc8536c81bd09c8607060d8f050.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a791e4c4e7269de898ae805cec231f6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
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【推荐3】海安市江淮文化园是以江淮历史文化为底蕴的人文景观,整个园区由白龙故里、先贤景区、凤山书院、中国名人艺术馆群四大景区组成.据估计,其中凤山书院景区每天的水电、人工等固定成本为1000元,另每增加一名游客需另外增加成本10元,凤山书院景区门票单价x(元)(x∈N*)与日门票销售量
(张)的关系如下表,并保证凤山书院景区每天盈利.
(1)在坐标图纸中,根据表中提供的数据,描出实数对
的对应点,并确定y与x的函数关系式;
(2)求出
的值,并解释其实际意义;
(3)请写出凤山书院景区的日利润
的表达式,并回答该景区怎样定价才能获最大日利润?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec8a14649950eb1c74a1a1af244fbf8f.png)
x | 20 | 35 | 40 | 50 |
y | 400 | 250 | 200 | 100 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c5fd03052304503a4ecac52539beec1.png)
(2)求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3852d686b813b122a9efd17798ded147.png)
(3)请写出凤山书院景区的日利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bfdb24ecf5da863405c2b40936ff9.png)
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