如图,抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cff1d869bfb86ba341fbe7330aac46a.png)
过点
,顶点
在第三象限,
,
是抛物线的对称轴
上的两点,且
,在直线
左侧以
为边作正方形
,点
恰好在抛物线上.
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490335364186112/2492940390924288/STEM/37bcb6d3ead949d4a7b7981590b27a5b.png?resizew=232)
(1)用含
的式子表示
;
(2)求证:点
和点
关于直线
对称;
(3)判断直线
和直线
(
是常数,且
)的交点是否在抛物线上,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cff1d869bfb86ba341fbe7330aac46a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/072f941f1fb5fff8b161c589463ddc9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a23e87d16c32b5aa4357f481b5808a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cead256658d6f874b3b298f8dd2c055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2020/6/22/2490335364186112/2492940390924288/STEM/37bcb6d3ead949d4a7b7981590b27a5b.png?resizew=232)
(1)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求证:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(3)判断直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c1c20ae4c40deddf64491da05c9deb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5873c01192b7d33b7483f444f90b5b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d106f5135c3c4130205ba559633224f.png)
更新时间:2020-06-26 13:23:07
|
【知识点】 图形运动问题(实际问题与二次函数)解读
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】如图,在
中,
,点D是
边的中点,过点D作
边的垂线,垂足为E,
,
,动点P从点A开始沿边
向点B以
的速度移动,到达B点后停止运动,动点Q从点B沿边
向点C以
的速度移动,到达C点后停止运动,如果P,Q两点分别从A,B两点同时出发,在运动过程中
的面积为S,运动时间为
.
![](https://img.xkw.com/dksih/QBM/2022/11/28/3119253594832896/3152756847403008/STEM/3302f6c675d44724beba246006a42e0d.png?resizew=431)
(1)求
和
的长;
(2)求S关于t的函数解析式,并直接写出t的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d9142db4dd2ef151bf3d4a63afb61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d590d88fe7eacfaa2d09690409ba8021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aafe62061fc6fc21ca3f3f1ee18c23ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5631e6ec24d3d67bf4592313b6b3f4f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d989a128e30a701dfff5592476a76bab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a138fefcb02cc063b48967c0fc9d28f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1a48b92c61d209d0556e4cd8fdb70b.png)
![](https://img.xkw.com/dksih/QBM/2022/11/28/3119253594832896/3152756847403008/STEM/3302f6c675d44724beba246006a42e0d.png?resizew=431)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求S关于t的函数解析式,并直接写出t的取值范围.
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】如图,在
中,
,
,
,动点P从点A出发,沿
以每秒1个单位长度的速度向终点B运动.过点P作
于点D(点P不与点A、B重合),作
,边
交射线
于点Q,设点P的运动时间为t秒.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/06f4de41-22b6-4b14-a2ee-83f7d55ef73f.png?resizew=170)
(1)当点Q与点C重合时,求t的值;
(2)设
与
重叠部分图形的面积为S,求S与t之间的函数关系式,并写出t的取值范围;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3018c687427b6257767eda4a8c6612.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2951b9f77413d5f062acb300b09de1f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7b05323a261f198e922fee329fd1295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/06f4de41-22b6-4b14-a2ee-83f7d55ef73f.png?resizew=170)
(1)当点Q与点C重合时,求t的值;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a138fefcb02cc063b48967c0fc9d28f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次