题目
题型:解答题难度:简单来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071053-17243.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071054-16593.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071054-76360.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071054-90061.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071054-16593.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071054-76360.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071054-77466.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071054-81392.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071055-45335.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071055-83748.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071055-63442.gif)
解析
则
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071055-46215.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071055-78679.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071056-11508.gif)
∴函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071056-46709.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071056-73083.gif)
(2)由
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071056-27041.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071056-20133.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071056-97875.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071057-58318.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071056-46709.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071057-77191.gif)
由定积分的几何意义知:
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071057-29582.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071057-93151.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071057-96011.gif)
∵曲线方程为
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071058-12122.gif)
∴点
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071058-19679.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071058-14051.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071058-34531.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071058-33575.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071059-32677.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071059-57317.gif)
∵过点
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071059-14664.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071059-75820.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071059-57317.gif)
设
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071059-64560.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071100-21258.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071100-52181.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071100-54621.gif)
∵当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071100-88725.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071100-33574.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071101-89957.gif)
∵当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071101-72474.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071101-87016.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071101-36172.gif)
∴函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071059-64560.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071100-54621.gif)
∴关于
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071059-75820.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071059-57317.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071102-51153.gif)
解得
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071055-63442.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071102-88525.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071055-63442.gif)
核心考点
试题【(本题满分14分)如图,已知二次函数,直线l:x = 2,直线l:y = 3tx(其中1< t < 1,t为常数);若直线l、l与函数的图象所围成的】;主要考察你对一次函数的图象和性质等知识点的理解。[详细]
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-57475.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-96994.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-50934.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-96994.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-49060.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-96994.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-80410.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-34749.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071045-92940.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-50934.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071045-81832.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071045-99943.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071045-99980.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071045-99943.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071045-95640.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071044-96994.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071046-70865.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071046-60177.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071046-43345.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071046-26440.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071046-49467.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071047-81074.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071047-80700.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071037-55075.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071037-20855.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071037-93020.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071038-13053.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071038-14909.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071038-71269.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071032-33740.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071032-61328.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071032-60430.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071032-21476.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071033-68234.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071024-75937.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071024-96699.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071024-14464.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071024-50948.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071025-99398.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071025-65733.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071025-32655.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071025-95417.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071025-19141.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071025-32655.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071018-67602.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071018-16321.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071018-37690.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071019-64954.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071019-81578.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819071019-31816.gif)
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