如图,抛物线
与x轴交于
,B两点(点A在点B的左侧),与y轴交于点C,直线
与抛物线交于A,D两点,与y轴交于点
.
(1)求m、k和b的值;
(2)求点D的坐标,并结合图象写出不等式
的解;
(3)若点Q是y轴上的点,且
,求点Q的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dda6de3adadad23cce4a2ed7b45129f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/774480361088aa3198c7bc3148fa23fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb12a4c7af72e2bbbe02ddd12313eff8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/23/7f077b29-fb32-4676-9606-2ebe6f110cc3.png?resizew=156)
(1)求m、k和b的值;
(2)求点D的坐标,并结合图象写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f016235bcfbb514726b4e18a56e43a59.png)
(3)若点Q是y轴上的点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd7b33b3e2dbfe5e4175757fd7053469.png)
更新时间:2023-08-22 14:40:44
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【推荐1】如图,一次函数
的图象与y轴交于点B,与正比例函数
(a为常数,且
)的图象交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/ed6fa79c-8110-421f-bfc3-6166e6b3248d.png?resizew=254)
(1)求
的面积.
(2)利用函数图象直接写出当
时,x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38e4c6b0d5d741ba353f3152bc5c4505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f664bbeb31ff78c5b8ce1fa605630528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ca979687ffb2214e747525635a6912c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/5/ed6fa79c-8110-421f-bfc3-6166e6b3248d.png?resizew=254)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
(2)利用函数图象直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
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【推荐2】如图,在平面直角坐标系
中,直线
与反比例函数
的图象交于
、B两点,与x轴交于点
,与y轴交于点D.
(2)求
的面积;
(3)根据图象,直接写出反比例函数值小于一次函数值时x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8986bfb4209a5d006003f2ef31edd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/141a978953fab3405756857de38243e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d03310fa9440053c57d878acc06d02d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
(3)根据图象,直接写出反比例函数值小于一次函数值时x的取值范围.
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【推荐1】已知二次函数y=ax2+bx+c的图象经过(0,3),(﹣1,0),(3,0)三点.
(1)求二次函数解析式;
(2)试说明y随x的变化情况.
(1)求二次函数解析式;
(2)试说明y随x的变化情况.
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【推荐2】如图,顶点为
的抛物线
的图象与直线
交于为
,
两点,
,直线与
轴交于点
,点
的纵坐标为3.
(1)求抛物线和直线解析式;
(2)判断
的形状,并说明理由;
(3)在二次函数图象上是否存在点
,使
,若存在直接写出点
的坐标,不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a5baff378f391aa2eb89f9435e2072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6767830cc1811f0f4ea5a008fdc7e723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/13/2fcf9df0-ef8f-4e62-95aa-305ad6d2bf0e.png?resizew=128)
(1)求抛物线和直线解析式;
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
(3)在二次函数图象上是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e271fd5f506da32dccaca98877047352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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【推荐3】小明用相同的圆点按照一定的规律拼摆图案,图案由符合规律的图形组成
(1)请你依据学习经验,将点
绘制在平面直角坐标系中,并用平滑的曲线连结各点,根据图象,你发现,m与n之间的关系可能满足我们所学过的________函数.(选填“一次”、“二次”、“反比例”)
(3)小明按照原规律拼摆了一组图案.若拼摆n号图形使用了
个圆点,则
________.
图形序号n(号) | 0 | 1 | 2 | 3 | 4 | 5 | …… |
圆点总数m(个) | 0 | 1 | 3 | 6 | 10 | 15 | …… |
(1)请你依据学习经验,将点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d08e2901a520286def7dc1ff72a4cb.png)
(3)小明按照原规律拼摆了一组图案.若拼摆n号图形使用了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315b343c05a0fa767710ba84911a1ebc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ff01f54e97b5d85b34907ea1da5754.png)
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【推荐1】如图,
是正方形
对角线延长线上的两点,且
,连接
.
(1)求证:
.
(2)试判断四边形
的形状,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ada55c12a53a4c469e052445547bed96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e825678030322bf7eb2f0249bf28ae25.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/24/0ee5d140-83b1-4efd-bef6-9564102ada0a.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d99bb3ab66b8884bf23cffe1bddcb33.png)
(2)试判断四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2330c01a4d2b5b20f106e3e48834d5c0.png)
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【推荐2】如图,四边形ABCD中,AB∥CD,AC与BD相交于点O,AO=CO.
(2)若AC⊥BD,AB=10,求BC的长.
(2)若AC⊥BD,AB=10,求BC的长.
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【推荐3】如图,在
中,
,高
、
相交于点O,
,且
.
的长;
(2)动点P从点O出发,沿线段
以每秒1个单位长度的速度向终点A运动,动点Q从点B出发沿射线
以每秒4个单位长度的速度运动,P、Q两点同时出发,当点P到达A点时,P、Q两点同时停止运动.设点P的运动时间为l秒,
的面积为S,请用含t的式子表示S;
(3)在(2)的条件下,点F是直线
上的一点且
.是否存在t值,使以点B、O、P为顶点的三角形与以点F、C、Q为顶点的三角形全等?若存在,请直接写出符合条件的t值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eda308a321126dceda6a09b7faf1d6af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45087cde2d66377517a3fce5553b35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
(2)动点P从点O出发,沿线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fdc02f00cf00a6dfd88b53a90f1f7a4.png)
(3)在(2)的条件下,点F是直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138405550404f5cabd6ae53fe3866edd.png)
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【推荐1】如下图所示,提供了一种求
的方法
解:作
,使
,再延长
到点D,使
,连接
,(请你继续完成求解过程)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd90c9ff8a48465550e329fbcbd46c6.png)
解:作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4708187f12c09897c391587c276a8e92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ab0389bef7fea9fd2429966ef6bf2d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/16/95d09d2c-347a-4e83-9b2b-2a9f38e4c1cb.png?resizew=164)
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【推荐2】如图,
中,
平分
,
,若
与
互补,
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/b6b731dd-543a-4fce-a4cc-97b5abbb5e3b.png?resizew=84)
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4ab7e657f01bdfa235f8c4d6681d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb8eca20ce2c918ea4034ea15210c7f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/3/b6b731dd-543a-4fce-a4cc-97b5abbb5e3b.png?resizew=84)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6a446d79ae2cdbd0d50c80ac891f257.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b515965c22d2950b592c096c6e3bdfd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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【推荐3】通过类比联想,引申拓展研究典型题目,可达到解一题知一类的目的,下面是一个案例,请补充完整.
原题:如图1,点EF分别在正方形ABCD的边BC、CD上,
,连接EF,试猜想EF、BE、DF之间的数量关系.
(1)思路梳理
把
绕点A逆时针旋转90°至
,可使AB与AD重合,由
,得
,即点F、D、G共线,易证
≌______,故EF、BE、DF之间的数量关系为______.
(2)类比引申
如图2,点EF分别在正方形ABCD的边CB、DC的延长线上,
.连接EF,试猜想EF、BE、DF之间的数量关系,并给出证明.
(3)联想拓展
如图3,在
中,
,
,点D、E均在边BC上,且
.若
,
,求DE的长.
原题:如图1,点EF分别在正方形ABCD的边BC、CD上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
(1)思路梳理
把
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bbd6f0a0412d0f43ce1f7c1d530e56e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5406da6da56fab36d73d59cdb6237fc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f775a85d3ae542dc58a479692a2453ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7572ecc467c061ef71cf4486ec63ec3e.png)
(2)类比引申
如图2,点EF分别在正方形ABCD的边CB、DC的延长线上,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192155e6a3aade305b76b1eb7c75e30c.png)
(3)联想拓展
如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c06154cae3bf7a8ce5a1e97a7380875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76805974fefbe166b90d260e822ab5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfb08f6a798dc293f3d8de281190f65e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f7d9f5e71bfef8188b1216c1276c2d.png)
![](https://img.xkw.com/dksih/QBM/2021/12/2/2863663226847232/2866950888136704/STEM/b8c84e15-994b-46c7-92e1-a44c4129aeab.png?resizew=464)
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