题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083336-74823.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083336-93070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083337-85584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083336-93070.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083337-50341.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083337-29305.png)
小题1:求抛物线的对称轴及点A的坐标
小题2:在平面直角坐标系
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083337-99038.png)
小题3:连结CA与抛物线的对称轴交于点D,在抛物线上是否存在点M,使得直线CM把四边形DEOC分成面积相等的两部分?若存在,请求出直线CM的解析式;若不存在,请说明理由.
答案
小题1:① 对称轴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083338-57857.png)
② 当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083338-47151.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083338-14037.png)
解之,得
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083338-79699.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083338-51147.png)
∴ 点A的坐标为(
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083339-25074.png)
小题2:满足条件的点P有3个,分别为(
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083339-16909.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083339-38247.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083339-25074.png)
小题3:存在.)
当
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083339-33965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083339-24002.png)
∵ DE∥
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083337-85584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-94189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-94189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-94189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-94189.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-34101.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-68649.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-74867.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083341-51274.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-94189.png)
∴
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083341-72509.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083341-37618.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-94189.png)
在OE上找点F,使OF
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-94189.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083341-37438.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083341-95894.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083342-81305.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083340-94189.png)
分成面积相等的两部分,交抛物线于点M.
设直线CM的解析式为
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083342-82320.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083342-63986.png)
则
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083342-12131.png)
解之,得
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083343-95071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083343-32984.png)
解析
核心考点
试题【如图,已知抛物线交轴于A、B两点,交轴于点C,抛物线的对称轴交轴于点E,点B的坐标为(,0).小题1:求抛物线的对称轴及点A的坐标小题2:在平面直角坐标系中是】;主要考察你对二次函数定义等知识点的理解。[详细]
举一反三
A.最大值1 | B.最小值-1 | C.最大值-3 | D.最小值3 |
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083308-30360.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083308-67452.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083308-32789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083308-47877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083308-95430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083308-32789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083309-56159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083309-60442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083309-28118.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083309-42869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083309-56159.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083309-60602.png)
小题1:求该抛物线的解析式;
小题2:动点
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083310-38038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083308-47877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083309-60442.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083310-38038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083310-23881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083310-65674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083310-69402.png)
小题3:若
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083310-51153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083310-38038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083311-77548.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083308-47877.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083309-42869.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083311-26108.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083311-84306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083310-65674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083311-44300.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083311-95805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083310-65674.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083311-66623.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083311-95805.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083311-27521.png)
(本题主要考查二次函数的性质,增减性和三角函数求值)
A.a<b<c | B.a<c<b | C.b<c<a | D.c<b<a |
(ⅰ)、新数据都在60到100(含60和100)之间。
(ⅱ)、新数据之间的大小关系与原数据之间的大小关系一致,即原数据大的对应的新数据也较大。问:
小题1:若y与x的关系式是 y=x+p(100-x),请说明:当p=
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083255-92337.png)
小题2:若按关系式:y=a(x-h)2+k(a﹥0)将数据进行变换,请写出一个满足上述要求的这种关系式。(不要求对关系式符合题意作说明,但要求写出关系式得出的主要过程)
![](http://img.shitiku.com.cn/uploads/allimg/20191019/20191019083255-31842.jpg)
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