如图,已知抛物线
的顶点C的坐标为
,此抛物线交x轴于点A,B两点,点P为直线AD上方抛物线上一点,过点P作
轴垂足为E,连接AP,PD.
(2)求线段PN的最大值;
(3)当
的面积是
的面积的
时,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0c9800e4b992044d16681e77ff6563c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77ac0286aeeda5e6fe54e6dbfd3ceeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae95e96ce568efee50145f8d017353df.png)
(2)求线段PN的最大值;
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7fbd6b9f85c086ac95562fe45e8d969.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
更新时间:2022-02-25 20:53:58
|
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解答题-作图题
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适中
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【推荐1】已知二次函数
.
(1)求该二次函数的顶点坐标和对称轴并画出它的图象;
(2)当函数值y小于0时,观察图象,直接写出自变量x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/620fff76456e4080c41c51661171c66f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/20/fcd51ed6-771e-4065-a943-f428e556abfc.png?resizew=215)
(1)求该二次函数的顶点坐标和对称轴并画出它的图象;
(2)当函数值y小于0时,观察图象,直接写出自变量x的取值范围.
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解答题-作图题
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适中
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【推荐2】在平面直角坐标系
中,抛物线
恰好经过
三个点中的两个点.
![](https://img.xkw.com/dksih/QBM/2022/11/21/3114456198242304/3130642263580672/STEM/763f8ff4b83041bdb65a4efeba106461.png?resizew=382)
(1)求该抛物线表达式;
(2)在给出的平面直角坐标系中画出这条抛物线;
(3)若直线
与该抛物线有两个不同的交点,则k的取值范围是___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b736d8cb466f0dad19f905000aba4da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96fce5b04ac25e50ae6402bbaf91814.png)
![](https://img.xkw.com/dksih/QBM/2022/11/21/3114456198242304/3130642263580672/STEM/763f8ff4b83041bdb65a4efeba106461.png?resizew=382)
(1)求该抛物线表达式;
(2)在给出的平面直角坐标系中画出这条抛物线;
(3)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead6a3dbd03539ef5e0807be57bb1e17.png)
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解答题-问答题
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【推荐3】在建筑工人临时宿舍外,有两根高度相等且相距10米的立柱AB,CD垂直于水平地面上,在AB,CD间拉起一根晾衣绳,由于绳子本身的重力,使绳子无法绷直,其形状可近似看成抛物线
,已知绳子最低点距离地面
米.以点B为坐标原点,直线BD为x轴,直线AB为y轴建立平面直角坐标系,如图1所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/18/1a45bc26-206f-4579-afbb-7a803bad0846.png?resizew=433)
(1)求立柱AB的长度;
(2)一段时间后,绳子被抻长,下垂更多,为了防止衣服碰到地面,在线段BD之间与AB相距4米的地方加上一根立柱MN撑起绳子,这时立柱左侧的抛物线
的最低点相对点A下降了1米,距立柱MN也是1米,如图2所示,求MN的长;
(3)若加在线段BD之间的立柱MN的长度是2.4米,并通过调整MN的位置,使抛物线
的开口大小与抛物线
的开口大小相同,顶点距离地面1.92米.求MN与CD的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a374fae9618801c5e039c4e8fc9f3b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d297eab7380f6a28ec010218d9ab4ba1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/18/1a45bc26-206f-4579-afbb-7a803bad0846.png?resizew=433)
(1)求立柱AB的长度;
(2)一段时间后,绳子被抻长,下垂更多,为了防止衣服碰到地面,在线段BD之间与AB相距4米的地方加上一根立柱MN撑起绳子,这时立柱左侧的抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
(3)若加在线段BD之间的立柱MN的长度是2.4米,并通过调整MN的位置,使抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615b8501c4640b08f37042a225f51379.png)
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解答题-问答题
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适中
(0.65)
【推荐1】已知抛物线
.
(1)当
时,求此抛物线的顶点坐标和对称轴;
(2)若代数式
的值为正整数,求
的值;
(3)当
时,抛物线
与
轴的正半轴相交于点
;当
时,抛物线
与
轴的正半轴相交于点
.若点
在点
的左边,试比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491eb72fb85ec333a3bc7ef2e7c25f48.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
(2)若代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16ae61996df21f83cf0d2f76a7150be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2559b21f95f61ec348ce7d2ce24985a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491eb72fb85ec333a3bc7ef2e7c25f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b62769b7177ef4bc952dc1dd51d6b510.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f22c1f52d902659e31db1cae4f3cf62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/491eb72fb85ec333a3bc7ef2e7c25f48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883f23ab75b490d6e9e03b8ff8b269c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
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解答题-应用题
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适中
(0.65)
【推荐2】抛物线
.
(1)用配方法求顶点坐标,对称轴;
(2)x取何值时,y随x的增大而减小?
(3)x取何值时,
;x取何值时,
;x取何值时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754f9ba9b45bc506c5b8014db9935c11.png)
(1)用配方法求顶点坐标,对称轴;
(2)x取何值时,y随x的增大而减小?
(3)x取何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a7df955fc17e92fd86302f8c34664a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57458464618fcf619375a93d3c66d69.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】已知抛物线
过点
.
(1)求
的值;
(2)求该抛物线顶点的坐标;
(3)当
时,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d906ead04c9aebd6947ca1898604a290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/853b7c8aa914373e10e622839676105f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求该抛物线顶点的坐标;
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2775b9afed5f48b84b8f5d218d0df65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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解答题-问答题
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名校
【推荐2】某商品的进价为每件20元,售价为每件25元时,每天可卖出250件.市场调查反映:如果调整价格,一件商品每涨价1元,每天要少卖出10件.
(1)求出每天所得的销售利润w(单位:元)与每件涨价x(单位:元)之间的函数关系式;
(2)求销售单价为多少元时,该商品每天的销售利润最大;
(3)商场的营销部在调控价格方面,提出了A,B两种营销方案.
方案A:每件商品涨价不超过5元;
方案B:每件商品的利润至少为16元.
请比较哪种方案的最大利润更高,并说明理由.
(1)求出每天所得的销售利润w(单位:元)与每件涨价x(单位:元)之间的函数关系式;
(2)求销售单价为多少元时,该商品每天的销售利润最大;
(3)商场的营销部在调控价格方面,提出了A,B两种营销方案.
方案A:每件商品涨价不超过5元;
方案B:每件商品的利润至少为16元.
请比较哪种方案的最大利润更高,并说明理由.
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解答题-问答题
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适中
(0.65)
名校
【推荐1】如图,抛物线
与
轴交于
两点(点
位于点
的右边),与
轴交于点
,连接
,
是抛物线上的一动点,点
的横坐标为
.
(1)求抛物线对应的函数表达式以及
两点的坐标.
(2)若点
位于第四象限,过点
作
,求
的最大值.
(3)
是抛物线对称轴上任意一点,若以点
为顶点的四边形是平行四边形,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a52e840316fb1ca5cd99cf6f32eb09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5725e3e4eb05b32563b4ee1d473756c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f0ec7f84f716a316ec92d133927666c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/18/37db1a4f-5d10-4a6c-8d07-9bed7f268ac1.png?resizew=451)
(1)求抛物线对应的函数表达式以及
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5725e3e4eb05b32563b4ee1d473756c.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/902f24325565a9dd95128a633a240da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f13de61a97c2c9b769dc5f80ddcda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】定义:在平面直角坐标系
中,当点
在图形
的内部,或在图形
上,且点
的横坐标和纵坐标相等时,则称点
为图形
的“和谐点”.
(1)如图,矩形
的顶点坐标分别是
,
,
,
,在点
,
,
中,是矩形
“和谐点”的是____________;
(2)点
是反比例函数
图象上的一个“和谐点”,则该函数图象上的另一个“和谐点”
的坐标是__________,直线
的表达式是
_____________;
(3)已知点
,
是抛物线
上的“和谐点”,点
在点
的左侧,点
是抛物线的顶点,连接
,
,
,求点
,
的坐标,并直接写出
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/e03a30a7-3ca9-402f-a8d0-496a1b67f78e.png?resizew=164)
(1)如图,矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9c730266ecf448c14608e24d37b986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fb6fd712d967a36c027693a54f91470.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ea77571a7e34f0f5b79e01b4da044f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0913e0c22ce025eea9a56d5c0b860063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60f84a812e21a7fe3e8b4c5c20aaf9b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85224de1af4939eed96e21d3e84e07f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585c45d21f71b9ff4afc6f9f16e8f37c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba9f9108cac55a7758ec9f0a95c0805.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5698fdca52f0b841d952897c6621a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b54e384a072508d4754e0f1636f8f66.png)
(3)已知点
![](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/6768a1cf5327de1af6a9763111eff30c.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/c5db41a1f31d6baee7c69990811edb9f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/15c0dbe3c080c4c4636c64803e5c1f76.png)
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