题目内容
工厂生产某种产品,次品率
与日产量
(万件)间的关系
(
为常数,且
),已知每生产一件合格产品盈利
元,每出现一件次品亏损
元.
(1)将日盈利额
(万元)表示为日产量
(万件)的函数;
(2)为使日盈利额最大,日产量应为多少万件?(注:
)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250315313.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250330266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408240232503621519.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250393249.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250408453.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250424287.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250440307.png)
(1)将日盈利额
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250455310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250330266.png)
(2)为使日盈利额最大,日产量应为多少万件?(注:
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408240232504861028.png)
(1)日盈利额
(万元)与日产量
(万件)的函数关系式为
;
(2)当日产量为
万件时,日盈利额最大.
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250455310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250330266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408240232505332000.png)
(2)当日产量为
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250424287.png)
试题分析:(1)根据“日盈利额
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250564164.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250580165.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250330266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250455310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250330266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250330266.png)
试题解析:(1)当
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250674360.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250689515.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408240232507051269.png)
当
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250720457.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250720575.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408240232507362546.png)
∴日盈利额
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250455310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250330266.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408240232507831986.png)
(2)当
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250674360.png)
当
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250798455.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408240232508301170.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408240232508451323.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250861421.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250876382.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250892380.png)
∴当
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250908460.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250923445.png)
∴
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250455310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250939455.png)
∴
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250455310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/201408240232509701242.png)
当
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250986481.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250455310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023251001509.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023251017499.png)
∴
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250455310.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023251064702.png)
综上:当
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250908460.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250393249.png)
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250455310.png)
当
![](http://thumb.1010pic.com/pic2/upload/papers/20140824/20140824023250986481.png)
![](http://thumb2018.1010pic.com/images/loading.gif)
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