如图,M为等腰△ABD的底AB的中点,过D作DC∥AB,连结BC:AB=8cm.DM=4cm,DC=1cm,动点P自A点出发,在AB上匀速运动,动点Q自点B出发,在折线BC﹣CD上匀速运动,速度均为1cm/s,当其中一个动点到达终点时,它们同时停止运动,设点P运动t(s)时,△MPQ的面积为S(不能构成△MPQ的动点除外).
(1)点Q在BC上运动时,求t的取值范围;
(2)当点Q在CD上运动时,求t为何值时,△MPQ是等腰三角形;
(3)求S与t之间的函数关系式;当t为何值时,S有最大值?最大值是多少?
(1)点Q在BC上运动时,求t的取值范围;
(2)当点Q在CD上运动时,求t为何值时,△MPQ是等腰三角形;
(3)求S与t之间的函数关系式;当t为何值时,S有最大值?最大值是多少?
![](https://img.xkw.com/dksih/QBM/2019/8/7/2263798007939072/2264554817413120/STEM/ea4389854a034b56bcb34f60d5d375fd.png?resizew=390)
更新时间:2019-08-08 21:11:28
|
相似题推荐
解答题-问答题
|
较难
(0.4)
名校
【推荐1】已知函数
.
(1)讨论
的增减性;
(2)说明当
为何值时
取到最小,并写出最小值;
(3)若A和B在函数图像上,A和B是函数图像的拐点且A在B的左边,P和Q分别是x、y轴上的动点,若A,B,P,Q四点连成的四边形是平行四边形,求出此时P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f4f1dcbc4b30337ca208ed8a6a749be.png)
(1)讨论
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(2)说明当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(3)若A和B在函数图像上,A和B是函数图像的拐点且A在B的左边,P和Q分别是x、y轴上的动点,若A,B,P,Q四点连成的四边形是平行四边形,求出此时P的坐标.
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】“唯有书香气,引得大咖来”. 2019年2月14日至15日,由北京师范大学国际写作中心、重庆市第一中学校共同发起的主题为“阅读与写作”——首届“作家进校园”与“校园写作计划”活动隆重举行. 10余位国内文学大咖云集一中校园,开启大师课堂,页再次在校园掀起了读书热潮. 学校图书馆准备购进甲、乙两种书籍若干册供师生阅读,已知购买3册甲种书和4册乙种书共需265元;购买8册甲种书和7册乙种书共需560元.
(1)求甲种、乙种书籍每册各多少元?
(2)学校图书馆计划采购甲、乙两种书籍共710册,沙坪坝新华书店对重庆一中图书馆给予优惠,甲种书的单价不变,而乙种书的单价降价10%,这样购买乙种书的总价仍不低于甲种书的总价,则校图书馆至少需要投入多少资金才能完成采购计划?
(1)求甲种、乙种书籍每册各多少元?
(2)学校图书馆计划采购甲、乙两种书籍共710册,沙坪坝新华书店对重庆一中图书馆给予优惠,甲种书的单价不变,而乙种书的单价降价10%,这样购买乙种书的总价仍不低于甲种书的总价,则校图书馆至少需要投入多少资金才能完成采购计划?
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐1】在平面直角坐标系
中,已知抛物线
.
(1)求该抛物线的对称轴(用含t的式子表示);
(2)若点
,
在抛物线
上,试比较m,n的大小;
(3)
,
是抛物线
上的任意两点,若对于
且
,都有
,求t的取值范围;
(4)
,
是抛物线
上的两点,且均满足
,求t的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a294a2058baaa4bd0fbd9698514ad339.png)
(1)求该抛物线的对称轴(用含t的式子表示);
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d20939f071ac54990ea24b4ee4a1563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07d925c8f08b47a908595311f3c3873e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a294a2058baaa4bd0fbd9698514ad339.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60574e468acf787924508b61d63db3c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45aab79ca04f343da6778cad10c2605.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a294a2058baaa4bd0fbd9698514ad339.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/997f997a9bffbf5f1239bb815f95910d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e4fd085ee10f340a008389c4a1a80d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/421a7d6f54bf58a7a4f4ce61e06aefa9.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b2b0247c972f469537d6f91a6b6484d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f891f6693291ed49c6a8223eeb5cf08a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a294a2058baaa4bd0fbd9698514ad339.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df86b0da538701c08fb214608e062372.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
名校
【推荐2】已知抛物线
与
轴交于点
,
,与
轴交于点
,连接
,点
是此抛物线的顶点.
(1)求抛物线的解析式;
(2)抛物线上
两点之间的距离是 ;
(3)①:点
是第一象限内抛物线上的动点,连接
和
,求
面积的最大值;
(4)在①的条件下,当
的面积最大时,
为
轴上一点,过点
作抛物线对称轴的垂线,垂足为
,连接
,探究
是否存在最小值.若存在,请直接写出此时点
的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f998f27d8fc98ad8733bbcc3be0f482a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0929421a6188c3122442866b0b85a5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54fe2c124d5bbbbe666ee145cd454b6b.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(1)求抛物线的解析式;
(2)抛物线上
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
(3)①:点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
(4)在①的条件下,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbfa1a2af7e38d33634c462300df381f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0128767f9d4f970c22fc993963cf3853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c41a7e8e87d79284b15549c5f553a829.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】如图,E,F分别是矩形ABCD的边AB,AD上的点,
.
(1)求证: AF=CD.
(2)若AD=2,△EFC的面积为
,求线段BE的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ae8fe78404873b41f21bbeef2f6edd6.png)
(1)求证: AF=CD.
(2)若AD=2,△EFC的面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://img.xkw.com/dksih/QBM/2018/5/7/1940265419997184/1941845502115840/STEM/25dc82bbc2994696b237e4cb4094868d.png?resizew=166)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】在四边形
中,
,
,
,
,
,
于点H.在
中,
,
,
.将
按如图1放置,顶点E在
上,且
,然后将
沿
平移至点E与点A重合,再改变
的位置,如图3,将顶点E沿
移动至点B,并使点H始终在
上.
(1)当点E在
上运动时,
如图1,连接
,当
时,求
的长;
如图2,设
与
的交点为M,当顶点G落在
上时,求
的长;
(2)如图3,点E在
上运动时,
交
于点P,设
,请用d表示
的长,并求出
长度的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4adf90a8c2b29334cdc5aa5b554991f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/284e282bb1d9fbf8634b3506ee5358ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78fb1fcaf49d18befa6ea9437d7bd472.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4744b427f036dfbc6db68c87cd5c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d48852ad433b0da21abf5be0f79260d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbcb573bddf8503ccdb402d8772c7b92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7b63537336fea79312cbfb82831320.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1a1fd2fc33e89f357cef772ff6cd0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e5e61804ce550636a0354e0a78a22d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/8/716cb96b-3ab8-4a11-9eed-866b882f361d.png?resizew=387)
(1)当点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
如图1,连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6d80f4864d66bf03827059bffdc224c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
如图2,设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c63e36329f5e0979f5ee776ac5d06327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
(2)如图3,点E在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c351cb19da2db20bcf116fff7e936621.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35d58f9019097bd05037aefd5c322916.png)
您最近一年使用:0次
解答题-证明题
|
较难
(0.4)
名校
【推荐1】问题初探:
如图1,已知
与
都是等腰三角形,顶角
,且
的中点均为
.请写出
与
间的数量关系,并证明;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/649e84ed-e0d7-4701-b798-ddc2cc6b3f6f.png?resizew=499)
问题深入:
如图2,已知
与
都是等边三角形,
的中点均为
,请写出
与
间的数量关系,并证明;
拓展创新:
如图3,在
和
中,
,
,
,点
在
内部,直线
与
交于点
.直接写出线段
之间的数量关系________.
如图1,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66b90ffe8c9a93aba917c61007e895.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c51424853857d7ca64d8b8dd74e972b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/649e84ed-e0d7-4701-b798-ddc2cc6b3f6f.png?resizew=499)
问题深入:
如图2,已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c51424853857d7ca64d8b8dd74e972b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
拓展创新:
如图3,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bdd83352f65446c38e118b0387fe7d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc75953bf5dcfa4af308c34bf9952d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7777a27259d26724229b604df42656c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384cc52843b3e9b9c6089933b02aac1f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](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/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5240e1676825cb4573bd86891c623a60.png)
您最近一年使用:0次
解答题-问答题
|
较难
(0.4)
【推荐2】如图,在平面直角坐标系中,点A,B分别在x轴,y轴正半轴上,AO=2BO,点C(3,0)(A点在C点的左侧),连接AB,过点A作AB的垂线,过点C作x轴的垂线,两条垂线交于点D,已知△ABO≌△DAC,直线BD交x轴于点E.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/1c10ddd8-012e-4392-823a-4972ec4fc0d5.png?resizew=319)
(1)求直线AD的解析式;
(2)直线AD有一点F,设点F的横坐标为t,若△ACF与△ADE相似,求t的值;
(3)如图2,在直线AD上找一点G,直线BD上找一点P,直线CD上找一点Q,使得四边形AQPG是菱形,求出G点的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/1c10ddd8-012e-4392-823a-4972ec4fc0d5.png?resizew=319)
(1)求直线AD的解析式;
(2)直线AD有一点F,设点F的横坐标为t,若△ACF与△ADE相似,求t的值;
(3)如图2,在直线AD上找一点G,直线BD上找一点P,直线CD上找一点Q,使得四边形AQPG是菱形,求出G点的坐标.
您最近一年使用:0次