抛物线
(b、c为常数)与x轴交于
、B两点(A点在B点左侧),与y轴交于点
.点P在该抛物线上且在x轴上方,设其横坐标为m.
(1)直接写出b,c的值:
_____,
______;
(2)连结
、
.当
时,求m的值;
(3)过点P作x轴的平行线与直线
交于点Q,
两点的距离记为d.请直接写出根据d的不同取值所对应的点P个数情况.(补充说明:当两点重合时,记
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052d7af2f98d95bac8725b608fba0fc.png)
(1)直接写出b,c的值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
(2)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e66023e340d95e89e83c6896faf71fd4.png)
(3)过点P作x轴的平行线与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85fa64abb0036dbff6a29f01b0c03899.png)
23-24九年级下·江苏无锡·阶段练习 查看更多[2]
江苏省无锡市宜兴市桃溪中学2023-2024学年九年级下学期第一次月考数学试题(已下线)热点04+函数(17大题型+满分技巧+限时分层检测)2-2024年中考数学【热点·重点·难点】专练(江苏专用)
更新时间:2024-05-05 17:37:18
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相似题推荐
解答题-问答题
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适中
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【推荐1】如图,抛物线
(a,c为常数,且
)与x轴交于
、
两点,且与y轴交于点
,直线
经过点
且与抛物线交于另一点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/a7c5bbde-1349-40fc-b257-f02e7b141195.png?resizew=145)
(1)求抛物线的解析式;
(2)
点在x轴上且位于点
的左侧,连接
,若以
,
,C为顶点的三角形与
相似,求点
的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96dde9c4aad0536c069127df0d4b12f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.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/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1bb89aec41e32d27b5f0914c494dead.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/4/a7c5bbde-1349-40fc-b257-f02e7b141195.png?resizew=145)
(1)求抛物线的解析式;
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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解答题-作图题
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【推荐2】已知函数
和
的图象交于
点和
点,并且
的图象与y轴交于点
.
![](https://img.xkw.com/dksih/QBM/2021/10/3/2821615330377728/2822159912435712/STEM/d4274131-0813-4178-aab3-8f26270c9029.png)
(1)求函数
和
的解析式,并画出函数示意图;
(2)x为何值时,①
;②
;③
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1208538bdb40783f623b348e8cf0ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe47e01d46d427917ef49b8b4547790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588cc54d8e1f8b9bb0faf4c8ae8a0c9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ae286ae8a209bc659ace6354b79abf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e1208538bdb40783f623b348e8cf0ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed18bd80c6c4142f68e89f4ad44570b5.png)
![](https://img.xkw.com/dksih/QBM/2021/10/3/2821615330377728/2822159912435712/STEM/d4274131-0813-4178-aab3-8f26270c9029.png)
(1)求函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
(2)x为何值时,①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f99df1a7b58018125b99578b779342.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1292c47f62023b747f1a4bd615c75284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
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【推荐1】(1)已知二次函数
,请你化成
的形式_______,并在直角坐标系中画出
的图像(列表、描点、连线);
(2)如果
是函数图像上的两点,且
,则
________
(填
,
或
)
(3)若函数
的图像与
轴没有交点,根据所画图像推断,实数
的取值范围为__________.
解:①、列表
②描点、连线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d794141572c8b1e70957754f32b9eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8757640e2fab7dbf868a14ff4e335cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d794141572c8b1e70957754f32b9eb.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/396de594dc73318b55be1c921023e088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(3)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5f5ecfcc527a07d5443607a67ea31a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
解:①、列表
… | 0 | … | |||||
… | 0 | 0 | … |
![](https://img.xkw.com/dksih/QBM/2020/3/18/2422046937341952/2422828290850816/STEM/0861d8ae718c4fee88268bdb11099c66.png?resizew=217)
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【推荐2】通过课本上对函数的学习,我们积累了研究函数性质的经验,以下是小明探究函数M:
的图象和性质的部分过程,请按要求回答问题:
(1)列表,列出y与x的几组对应值如表:
表格中,
______.
(2)在下图所示的平面直角坐标系xOy中,画出函数M的图象.
(3)观察图象,性质及其运用:
①当
______时,y随x的增大而增大;
②求函数M:
与直线l:
的交点坐标;
③若函数M:
与直线l:
只有两个交点,请求出b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3353cc3635799b70a5e42b080357bb10.png)
(1)列表,列出y与x的几组对应值如表:
x | … | 0 | 1 | 2 | 3 | 4 | … | ||||||||
y | … | 3 | 0 | 0 | 3 | 0 | a | 0 | 3 | … |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
(2)在下图所示的平面直角坐标系xOy中,画出函数M的图象.
(3)观察图象,性质及其运用:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/7/21d7dd96-e0aa-430c-8483-b6adea653c55.png?resizew=273)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
②求函数M:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3353cc3635799b70a5e42b080357bb10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/650353eda77d014bb42d185bd967e549.png)
③若函数M:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3353cc3635799b70a5e42b080357bb10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bebb3b7f47e0decd48e64cb32aaa5903.png)
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解答题-证明题
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【推荐1】如图,平行四边形ABCD中,
.对角线
相交于点O,将直线AC绕点O顺时针旋转,分别交
于点E,F.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/5e32d645-b38b-403c-ac16-614ffb0e34b5.png?resizew=183)
(1)证明:当旋转角为90°时,四边形ABEF是平行四边形;
(2)证明:在旋转过程中,线段AF与EC总保持相等;
(3)在旋转过程中,当AC绕点O顺时针旋转多少度时,四边形BEDF是菱形,请给出证明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2d355acb716a715b43e879f16ab35da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46c696ff5f123a482bae81cf9a1b570.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/2/5e32d645-b38b-403c-ac16-614ffb0e34b5.png?resizew=183)
(1)证明:当旋转角为90°时,四边形ABEF是平行四边形;
(2)证明:在旋转过程中,线段AF与EC总保持相等;
(3)在旋转过程中,当AC绕点O顺时针旋转多少度时,四边形BEDF是菱形,请给出证明.
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【推荐2】已知:如图,在△ABC中,BD、CE分别是边AC、AB上的高,点M是BC的中点,且MN⊥DE,垂足为点N
![](https://img.xkw.com/dksih/QBM/2018/12/21/2101493603721216/2103153864507392/STEM/7e3a9d7b69304137afd647ae423490ae.png?resizew=140)
⑴求证:ME=MD;
⑵若BC=20cm,ED=12cm,求MN的长
⑶如果BD平分∠ABC,求证:AC=4EN.
![](https://img.xkw.com/dksih/QBM/2018/12/21/2101493603721216/2103153864507392/STEM/7e3a9d7b69304137afd647ae423490ae.png?resizew=140)
⑴求证:ME=MD;
⑵若BC=20cm,ED=12cm,求MN的长
⑶如果BD平分∠ABC,求证:AC=4EN.
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名校
【推荐1】设
中,∠C=90°,∠A、∠B、∠C的对边分别为a、b、c,若b=6,c=10,求sinA、cosA和tanA.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
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【推荐2】在△ABC中,∠C=90°,AC=
AB,求sinA,tanB的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954795d1842974a705f9468f3b952ab1.png)
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