2022年二次函数与距离最小值 .pdf
二次函数与距离最小值.如图,抛物线yax2c(a 0)经过梯形ABCD 的四个顶点,梯形的底AD 在 x 轴上,其中 A(2,0),B(1,3)(1)求抛物线的解析式;(2)点 M 为 y 轴上任意一点,当点M 到 A、B 两点的距离之和为最小时,求此时点M 的坐标;(3)在第(2)问的结论下,抛物线上的点P 使 SPAD 4SABM成立,求点P 的坐标参考答案:42xyBD:2xy;M(0,)22ABMS;)4,0(),4,22(),4,22(321PPP.如图,在直角坐标系中,点A 的坐标为(2,0),连结 OA,将线段OA 绕原点 O 顺时针旋转 120,得到线段OB.(1)求点 B 的坐标;(2)求经过A、O、B 三点的抛物线的解析式;(3)在(2)中抛物线的对称轴上是否存在点C,使 BOC 的周长最小?若存在,求出点C的坐标;若不存在,请说明理由.(4)如果点 P 是(2)中的抛物线上的动点,且在 x 轴的下方,那么 PAB 是否有最大面积?若有,求出此时P 点的坐标及 PAB 的最大面积;若没有,请说明理由.参考答案:B(1,3)xxy332332AB:33233xy;C(3,1)839)21(232xy;)435,21(PB A O y x.(05 深圳)已知 ABC 是边长为4 的等边三角形,BC 在 x 轴上,点D 为 BC 的中点,点 A 在第一象限内,AB 与 y 轴的正半轴相交于点E,点 B(-1,0),P 是 AC 上的一个动点(P 与点 A、C 不重合)(1)求点 A、E 的坐标;(2)若 y=cbxx7362过点 A、E,求抛物线的解析式。(3)连结 PB、PD,设 L 为 PBD 的周长,当 L 取最小值时,求点 P的坐标及 L 的最小值,并判断此时点P 是否在(2)中所求的抛物线上,请充分说明你的判断理由。参考答案:A(1,23),E(0,3)373137362xxyAC:333xy;D(4,3);BD:5353xy;P()332,37;周长为27+2.如图,以矩形OABC 的顶点 O 为原点,OA 所在的直线为x 轴,OC 所在的直线为y轴,建立平面直角坐标系已知OA3,OC2,点 E 是 AB 的中点,在OA 上取一点 D,将BDA 沿 BD 翻折,使点A 落在 BC 边上的点F 处(1)直接写出点E、F 的坐标;(2)设顶点为F 的抛物线交y轴正半轴于点 P,且以点 E、F、P 为顶点的三角形是等腰三角形,求该抛物线的解析式;(3)在 x 轴、y轴上是否分别存在点M、N,使得四边形MNFE 的周长最小?如果存在,求出周长的最小值;如果不存在,请说明理由参考答案:(,),(,);(,),322xxy55A B C O D E y x 文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7文档编码:CW10C8G3U9U3 HT2L9R6Z3E4 ZY6U4K10L2W7.如图 1,抛物线 y=ax2+bx+c(a0)的顶点为C(1,4),交 x 轴于 A、B 两点,交 y 轴于点D,其中点B 的坐标为(3,0)。求抛物线的解析式如图 2,过点 A 的直线与抛物线交于点E,交 y 轴于点 F,其中点 E 的横坐标为2。若直线PQ 为抛物线的对称轴,点G 为直线 PQ 上的一动点,则x 轴上是否存在一点H,使点 D、G、H、F 四点所围成的四边形周长最小,若存在,求出这个最小值及点G、H 的坐标;若不存在,请说明理参考答案:322xxyE(2,3);AE:1xy;G(1,1);12xy;2+25.6.如图,在 平面直角坐标系中放置一矩形ABCO,其顶点为A(0,1),B(-33,1),C(-33,0),O(0,0).将此矩形沿着过E(-3,1)、F(-334,0)的直线 EF 向右下方翻折,B、C 的对应点分别为B、C.(1)求折痕所在直线EF 的解析式;(2)一抛物线经过B、E、B三点,求此二次函数解析式;(3)能否在直线EF 上求一点P,使得 PBC 周长最小?如能,求出P 点坐标;若不能,说明理由。参考答案:43xy2334312xxy:233xy;()21,233文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R37.如图,一元二次方程2230 xx的二根12xx,(12xx)是抛物线2yaxbxc与x轴的两个交点BC,的横坐标,且此抛物线过点(3 6)A,(1)求此二次函数的解析式(2)设此抛物线的顶点为P,对称轴与线段AC相交于点Q,求点P和点Q的坐标(3)在x轴上有一动点M,当MQMA取得最小值时,求M点的坐标参考答案:132312xxy34,1,:3xy;2,1xy2;0,08(09 济南)已知:抛物线20yaxbxc a的对称轴为1x,与x轴交于AB,两点,与y轴交于点C,其中3 0A,、02C,(1)求这条抛物线的函数表达式(2)已知在对称轴上存在一点P,使得PBC的周长最小请求出点P 的坐标(3)若点D是线段OC上的一个动点(不与点 O、点 C 重合)过点 D 作DEPC交x轴于点E连接PD、PE设CD的长为m,PDE的面积为S求S与m之间的函数关系式试说明S是否存在最大值,若存在,请求出最大值;若不存在,请说明理由参考答案:234322xxy:232xy;)34,1(=43)1(432mx y A(3,6)Q C O B P A C x y B O 文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R39.如图,在平面直角坐标系中,直线33yx与轴交于点A,与y轴交于点C,抛物线22 3(0)3yaxxc a经过ABC,三点(1)求过ABC,三点抛物线的解析式并求出顶点F的坐标;(2)在抛物线上是否存在点P,使ABP为直角三角形,若存在,直接写出P点坐标;若不存在,请说明理由;(3)试探究在直线AC上是否存在一点M,使得MBF的周长最小,若存在,求出M点的坐标;若不存在,请说明理由10.如图,已知二次函数y21x2bx c(c0)的图象与x 轴的正半轴相交于点A、B,与y轴相交于点C,且 OC2OAOB(1)求 c 的值;(2)若 ABC 的面积为3,求该二次函数的解析式;(3)设 D 是(2)中所确定的二次函数图象的顶点,试问在直线AC 上是否存在一点P,使PBD 的周长最小?若存在,求出点P 的坐标;若不存在,请说明理由文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3.如图,在直角坐标系中,以点A(3,0)为圆心,以23为半径的圆与x 轴相交于点 B、C,与 y 轴相交于点D、E.(1)若抛物线y=31x2+bx+c 经过 C、D 两点,求抛物线的解析式,并判断点B 是否在该抛物线上。(2)在(1)中的抛物线的对称轴上求一点P,使得 PBD 的周长最小。(3)设 Q 为(1)中的抛物线的对称轴上的一点,在抛物线上是否存在这样的点M,使得以B、C、Q、M 为顶点的四边形是平行四边形,若存在,求出M 点的坐标;若不存在,请说明理由。如图,OABC 是一张放在平面直角坐标系中的矩形纸片,O 为原点,点A 在 x 的正半轴上,点C 在 y 的正半轴上,OA=5,OC=3.(1)在 AB 上取一点 D,将纸片沿OD 翻折,使点A 落在 BC 边上的点E 处,求点D、E 的坐标;(2)若过点 D、E 的抛物线与x 轴相交于点F(-5,0),求抛物线的解析式和对称轴方程;(3)若(2)中的抛物线与y 轴交于点H,在抛物线上是否存在点P,使 PFH 的内心在坐标轴上?若存在,求出点P的坐标,若不存在,请说明理由;(4)若(2)中的抛物线与y 轴交于点H,点 Q 在线段 OD 上移动,作直线HQ,当点 Q 移动到什么位置时,O、D 两点到直线HQ 的距离之和最大?请直接写出此时点Q 的坐标及直线 HQ 的解析式。文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R313.(08 福建莆田)如图:抛物线经过A(-3,0)、B(0,4)、C(4,0)三点.(1)求抛物线的解析式.(2)已知 AD=AB(D 在线段 AC 上),有一动点P 从点 A 沿线段 AC 以每秒 1 个单位长度的速度移动;同时另一个动点Q 以某一速度从点B 沿线段 BC 移动,经过 t 秒的移动,线段PQ 被 BD 垂直平分,求t 的值;(3)在(2)的情况下,抛物线的对称轴上是否存在一点M,使 MQ+MC 的值最小?若存在,请求出点M 的坐标;若不存在,请说明理由。参考答案:431312xxy725t)4128,21(M文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码:CL4N1L8B10A5 HW5H1O1K4K5 ZR10P1D6A3R3文档编码: