题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024621-40739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024621-57949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024622-36325.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024622-12187.png)
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024622-48640.png)
直线
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024621-57949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024622-36325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024621-40739.png)
而直线
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024621-40739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024621-57949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024622-91164.png)
则由(-2,0)、(0,0),(-1,1)三点所围成三角形得底边AO长为2,高BC为1,
∵点B的坐标为(-1,1),
∴OC=AC=1,
∴BA=BO=
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024623-81936.png)
∴直线
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024621-40739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024621-57949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024622-36325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024623-81936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024623-81936.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024623-81936.png)
核心考点
举一反三
A.8种 | B.9种 | C.16种 | D.17种 |
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-78812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-38902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-96604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-96604.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-78812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-38902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-78812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-78812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024608-62201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024608-62780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024608-53796.png)
(1)请直接写出冲锋舟从
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-78812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-38902.png)
(2)求水流的速度.
(3)冲锋舟将
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-38902.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-78812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-78812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024608-62201.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024608-62780.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024608-77207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024607-78812.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024557-29341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024557-96010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024557-68170.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024557-45587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024558-72155.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024558-51944.png)
(1)有多少种生产方案?
(2)现要把生产的全部桌椅运往震区,已知每套
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024557-96010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024557-45587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024558-70836.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024557-96010.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024558-19394.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024558-89897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024559-18279.png)
(3)按(2)的方案计算,有没有剩余木料?如果有,请直接写出用剩余木料再生产以上两种型号的桌椅,最多还可以为多少名学生提供桌椅;如果没有,请说明理由.
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024554-59114.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024536-50498.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024536-67017.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024536-76754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024536-76754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024537-88685.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024537-81583.png)
(1)求m的取值范围;
(2)求S关于m的函数关系式;
(3)设点B在
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024536-76754.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024537-81583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024537-25317.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191016/20191016024537-30860.png)
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