如图,马路
南边有一小池塘,池塘岸
长40米,池塘的最远端
到
的距离为400米,且池塘的边界为抛物线型,现要在池塘的周边建一个等腰梯形的环池塘小路
,且
均与小池塘岸线相切,记
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/f5300f23-47d1-45dc-986f-931b5345db19.png?resizew=146)
(1)求小路的总长,用
表示;
(2)若在小路与小池塘之间(图中阴影区域)铺上草坪,求所需铺草坪面积最小时,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b467455ea6b8b7f5e6dd53110bc22060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b467455ea6b8b7f5e6dd53110bc22060.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb689a793465929f004e561242fa993.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/f5300f23-47d1-45dc-986f-931b5345db19.png?resizew=146)
(1)求小路的总长,用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)若在小路与小池塘之间(图中阴影区域)铺上草坪,求所需铺草坪面积最小时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43660b1543b3a2b46185f7629d28a963.png)
19-20高二上·江苏·阶段练习 查看更多[3]
(已下线)江苏省如皋市2019-2020学年度高二年级上学期教学质量调研(一)数学试题江苏省南通巿2019-2020学年高二上学期第一次教学质量调研数学试题(已下线)专题3.13 直线与抛物线的位置关系-重难点题型精讲-2022-2023学年高二数学举一反三系列(人教A版2019选择性必修第一册)
更新时间:2019-11-06 19:49:54
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【推荐1】某便民超市经销一种小袋装地方特色桃酥食品,每袋桃酥的成本为6元,预计当一袋桃酥的售价为
元
时,一年的销售量为
万袋,并且全年该桃酥食品共需支付
万元的管理费. 一年的利润
一年的销售量
售价
(一年销售桃酥的成本
一年的管理费).(单位:万元)
(1)求该超市一年的利润
(万元)与每袋桃酥食品的售价
的函数关系式;
(2)当每袋桃酥的售价为多少元时,该超市一年的利润
最大,并求出
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b953bee67546e5b901caf8449d20632c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9025a6be80c2da4473cca1fe9fa6980c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e1725516933bb441200c903bfa1ef3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2468403b3eba9e40bfa36f464e927738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d4cd9a7068de096606d1ab991f5e6da.png)
(1)求该超市一年的利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当每袋桃酥的售价为多少元时,该超市一年的利润
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
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【推荐2】已知函数
.
(1)求函数f(x)在[0,π]上的单调递减区间;
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f86a87c43cca523f5bb54cf00ccbb6e.png)
(1)求函数f(x)在[0,π]上的单调递减区间;
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【推荐1】已知抛物线
的焦点为
是抛物线上一点且三角形MOF的面积为
(其中O为坐标原点),不过点M的直线l与抛物线C交于P,Q两点,且以PQ为直径的圆经过点M,过点M作
交PQ于点N.
(1)求抛物线C的方程;
(2)求证直线PQ恒过定点,并求出点N的轨迹方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c68c78768c0b779356a139a4dad1e7d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca8b26c3ad6d892590290a2304126bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8c957b71beace01e35905eccbca90d.png)
(1)求抛物线C的方程;
(2)求证直线PQ恒过定点,并求出点N的轨迹方程.
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【推荐2】已知抛物线
的顶点在原点,焦点
在
轴正半轴上,抛物线上一点
到其准线的距离为5,过点
的直线
依次与抛物线
及圆
交于
、
、
、
四点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/09bc32ea-5ba8-428b-b19c-cedeb983ca7f.png?resizew=182)
(1)求抛物线
的方程;
(2)探究
是否为定值,若是,求出该定值;若不是,请说明理由;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c0980761f2c189bb51b9c12a79d77d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e318cefab1d71238b6a770e9d5fe154e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)探究
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ba9fc9ae9bc7000a7f3daba16091a02.png)
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【推荐1】已知抛物线
的顶点在原点
,对称轴是
轴,且过点
.
(Ⅰ)求抛物线
的方程;
(Ⅱ)已知斜率为
的直线
交
轴于点
,且与曲线
相切于点
,点
在曲线
上,且直线
轴,
关于点
的对称点为
,判断点
是否共线,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e704eaf9698ee2b95099250110283a.png)
(Ⅰ)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)已知斜率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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【推荐2】已知抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97afdeaa1d4433cffe5005446fcbbbb.png)
,其焦点到准线的距离为2,直线
与抛物线
交于
,
两点,过
,
分别作抛物线
的切线
,
,
与
交于点
.
(Ⅰ)求
的值;
(Ⅱ)若
,求
面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e97afdeaa1d4433cffe5005446fcbbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b75ed10db4b9747a4b6d865b774f6b6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.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/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/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a11cb104b04c4e6a1be700e81da279a.png)
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【推荐1】已知抛物线C:
,过点
的动直线l与C交于
两点,抛物线C在点A和点B处的切线相交于点Q,直线
与x轴分别相交于点
.
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572917091745792/1572917098119168/STEM/9ece48e6934d462b9db5c0ad38ef159e.png?resizew=227)
(1)写出抛物线C的焦点坐标和准线方程;
(2)求证:点Q在直线
上;
(3)判断是否存在点P,使得四边形
为矩形?若存在,求出点P的坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42102c1c07562853219ca5918803a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1c2eb6221ac5ff075bd2430b8d6c03f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec56d586906ebaaa3c32c85a415f4c69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572917091745792/1572917098119168/STEM/9ece48e6934d462b9db5c0ad38ef159e.png?resizew=227)
(1)写出抛物线C的焦点坐标和准线方程;
(2)求证:点Q在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e94225571c3047d785d380134a16bd.png)
(3)判断是否存在点P,使得四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2affb11af880295a826ebcb22b9d9b.png)
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【推荐2】已知抛物线
过点
,直线
与抛物线
交于
,
两点.
(1)求抛物线
在点
处的切线方程;
(2)已知直线
,
与以
为圆心,
为半径的圆
都仅有1个交点,判断直线
与圆
的位置关系,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2a21beb3c88e85fd5891d3a98fdd9ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbec9be35b54843d8802f264579b9153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7701770e23dfdbd4f1df826b2cf09a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
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