题目
题型:解答题难度:一般来源:不详
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-67187.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-98006.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-55708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-66375.gif)
(1) 求
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-55708.gif)
(2) 设直线
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-66709.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065754-54060.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-55708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065754-76157.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065754-51574.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065754-54060.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-55708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065754-64619.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065754-62937.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065755-13968.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065755-30587.gif)
(3)已知
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065755-26955.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065755-75971.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065755-59334.gif)
(2)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065755-76046.gif)
(3)证明略
解析
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065756-35853.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065756-55010.gif)
故
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065755-59334.gif)
(2) 据题意, 直线
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065754-54060.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-55708.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065756-11926.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065756-16483.gif)
义知
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065756-81141.gif)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065757-83419.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065757-38221.gif)
=
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065757-99877.gif)
而
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065757-60722.gif)
令
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065757-64966.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065758-80744.gif)
当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065758-10945.gif)
故当
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065755-76046.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065755-13968.gif)
(3)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065758-95447.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065753-66375.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065758-42610.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065758-98279.gif)
由①+②得:
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065759-62635.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065759-40617.gif)
又
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065759-53987.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065759-29011.gif)
故
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065759-97326.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065800-98047.gif)
核心考点
试题【已知二次函数, 满足且的最小值是.(1) 求的解析式;(2) 设直线,若直线与的图象以及轴所围成封闭图形的面积是, 直线与的图象所围成封闭图形的面积是,设,当取】;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/20190819/20190819065748-37955.gif)
(1)求证
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065748-45293.gif)
(2)函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065748-40217.gif)
(3)设
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065749-48747.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065749-23862.gif)
若
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065745-79740.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065745-62404.gif)
A.![]() | B.![]() |
C.![]() | D.![]() |
已知函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065738-89600.gif)
(1)由函数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065739-34096.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065739-91039.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065739-91039.gif)
(2)若存在实数
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065739-43922.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065739-58798.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065739-14780.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065736-14986.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065737-43908.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065737-63240.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065734-77456.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065734-25416.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20190819/20190819065734-83426.gif)
A.![]() | B.![]() | C.![]() ![]() ![]() | D.![]() |
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