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2016年中考数学复习专题40存在性问题(含中考真题解析).pdf

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1、20XX年中考数学复习专题40：存在性问题(含中考真题解析)导读：就爱阅读网友为您分享以下“20XX年中考数学复习专题40：存在性问题(含中考真题解析)”的资讯，希望对您有所帮助，感谢您对的支持!（2）利用待定系数法即可求得函数的解析式；化为顶点式得到点 C 的坐标，过点A、B、C 三点分别作x 轴的垂线，垂足分别为D、EE、F，求得 ABC 的面积（3）分当点P 位于点 G 的下方和上方，两种情况进行讨论求解试题解析：解：（1）无数；y=x21?1?b?c?2?9?3b?c?1（2）设 l2 的解析式是y=x2+bx+c，l2 经过点 A（1，2）和 B（3，1），?，9?b?2?c?11

2、2?解得：?y?x2?l2 的解析式是：2 911 x?22文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R

3、9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10

4、R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E1

5、0R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E

6、10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5

7、E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF

8、5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T102 7?91

9、19?7?9?,?y?x?x?x?41622416?，顶点 C 的坐标是7 如答图 1，过点 A、B、C 三点分别作x 轴的垂线，垂足分别为 D、E、F，则 AD=2，CF=16，53 BE=1，DE=2，DF=4，FE=4 1516 SABC=S 梯形 ABED S 梯形 BCFE S 梯形 ACFD=5?h 文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O

10、6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9

11、O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R

12、9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10

13、R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E1

14、0R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E

15、10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5

16、E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10设点 P 的坐标为（0，h），当点 P 位于点 G 的下方时，如答图 2，PG=2，连接 AP、?1?55?h3?1?h?222?BP，则SABP=S BPGSAPG=1555?又 SABC=SABP=16，得 h=16 55 点 P 的坐标为（0，16）?255?h 文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文

17、档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10

18、文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T1

19、0文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T

20、10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10

21、T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G1

22、0T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G

23、10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10当点 P 位于点 G 的上方时，如答图3，PG=2，同上可得h=16，点 P 的坐标为（0，?2516）2555?综上所述，所求点P 的坐标为（0，16）或（0

24、，16）?考点：1二次函数综合题；2线动平移问题；3待定系数法的应用；4曲线上点的坐标与方程的关系；5二次函数的性质；6三角形和梯形面积；7分类思想、转换思想和方程思想的应用6（2014 海南）如图，对称轴为直线x=2 的抛物线经过点A（-1，0），C（0，5）两点，与 x 轴另一交点为B，已知 M（0，1），E（a，0），F（a+1，0），点 P 是第一象限内的抛物线上的动点文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N

25、5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1

26、N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N

27、1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5

28、N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ

29、5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 H

30、Q5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8

31、HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10（1）求此抛物线的解析式；（2）当 a=1 时，求四边形MEFP 面积的最大值，并求此时点 P 的坐标；（3）若 PCM 是以点 P 为顶点的等腰三角形，求 a 为何值时，四边形PMEF 周长最小？请说明理由【答案】（1）y=x2+4x+5；（2）当x?9153 4 时，四边形MEFP 面积

32、的最大，最大值为16，9143a?(,)时，四边形FMEF 周长最小此时点 P 坐标为 416；（3 文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C

33、3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2

34、C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC

35、2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 Z

36、C2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4

37、ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4

38、 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A

39、4 ZC2C3A1G10T10）当【解析】试题分析：（1）设顶点式，利用待定系数法求出抛物线的解析式（2）当 a=1 时，E（1，0），F（2，0），设 P 的坐标为（x，x2+4x+5）如答图 1，过点 P 作 y 轴的垂线，垂足为G，则四边形 MEFP 面积S?S四边形 OFPG?S?MGP 111(OF?GP)?OG?GP?MG?OE?OM?S?EOM222=111999153(2?x)(?x2?4x?5)?x(?x2?4x?5?1)?1?1?x2?x?(x?)2?2222=416，=2=文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF

40、5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:C

41、F5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:

42、CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码

43、:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编

44、码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档

45、编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文

46、档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10 x?91539143(,)4 时，四边形MEFP面积的最大，最大值为16，此时点P坐标为 416当（3）如答图2，把点 M 向右平移1 个单位得点M1，再做点 M1 关于

47、 x 轴的对称点M2，在四边形FMEF 中，因为边PM，EF 为固定值，所以要使四边形FMEF周长最小，则ME+PF 最小，因为ME=M1F=M2F，所以只要使M2F+PF最小即可，所以点F 应该是直线M2P 与 x 轴的交点，由OM=1，OC=5，得点P 的纵坐标为3，根据y=x2+4x+5可求得点 P 文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8

48、 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N

49、8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6

50、N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O6N8 HQ5N1N5A5A4 ZC2C3A1G10T10文档编码:CF5E10R9O

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