在
中,
为坐标原点,
在第一象限,其中内心
,其中
,
,
三点都是整数点.
(1)求直线
的解析式;
(2)
,求整点
的个数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17ca7ca29873225a554ddf912160fc77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/747a1f0e2e633cc054231b8c61569e60.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/e105760638b22b26ff8bec4354255e4c.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7a3e520a16d4fdd73c4e6a4ce7be0e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2066eeb330ac1d7c3f91772fb4e9b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65a9354a07397b21c33820fc2590e814.png)
更新时间:2023-10-19 18:14:04
|
相似题推荐
解答题-问答题
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困难
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【推荐1】如图,在平面直角坐标系中,点A的坐标为
,点B的坐标为
,点C的坐标为
,O是坐标原点,点M,N分别为四边形
边上的动点,动点M从点O开始,以每秒1个单位长度的速度沿
路线向终点B匀速运动,动点N从点O开始,以每秒2个单位长度的速度沿
路线向终点A匀速运动,点M,N同时从O点出发,当其中一点到达终点后,另一点也随之停止运动.设动点运动的时间为t秒
的面积为S.
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962134649036800/2964184763334656/STEM/b00b6a83-c57c-4036-8ed4-e2873b35673d.png?resizew=646)
(1)求直线
的表达式.
(2)当
时,求S的值;
(3)若
,请直接写出此时t的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a41261c5f84ff0863f4a1bc1a39f0cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb24db2367cea20ab2f67db1bc0821ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb247e41310a9475af58bd6f28f813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3542e0d9800387405e7bb944d101c72b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5e2db0d8e98f18d97bb40867eccd334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df0239daa7c524800096fcec520667d8.png)
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962134649036800/2964184763334656/STEM/b00b6a83-c57c-4036-8ed4-e2873b35673d.png?resizew=646)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbeede118c407a800b05757b9a1393e.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99f8122e7ffce6a433f5b87b5450986b.png)
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【推荐2】如图,在平面直角坐标系
中,直线
与
轴、
轴分别交于点
、点
,直线
与
轴、
轴分别交于分别交于点
、点
,直线
的解析式为
,直线
的解析式为
,两直线交于点
,且
.
(1)求直线
的解析式;
(2)将直线
向下平移一定的距离,使得平移后的直线经过
点,且与
轴交于点
,求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.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/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/819ef249e064a22be5910b8e175c9e96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e114459637a3db306e91b5e9ee9aae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03568f41e1c1f97d91400d2da889f3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/857ff38d73254a56cb6ff0c17d26916f.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)将直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48a61d8bedef61745ee4fd89a8c0c119.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/911ba0b3-2513-4fb3-8637-14572f44fcfa.png?resizew=181)
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【推荐1】如图,在
中,
,与
、
相邻的外角平分线交于点A,过点A分别作直线CM、CN的垂线,B、D为垂足.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/63a372eb-3f27-4a47-9ec6-56fb6e961300.png?resizew=117)
(1)求证:四边形ABCD是正方形.
(2)若
,
,求
的长.
(3)借助上面问题的解题思路,解决下列问题:
若在
中,
,PH是
的一条高,
,
,请直接写出HF的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adb0d515b78bcf97480228f1f08431e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc05fedc31f9f46f04ccfb0d0fdc23f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b18578bc75bf971b8337c35a2db5fea.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/5/63a372eb-3f27-4a47-9ec6-56fb6e961300.png?resizew=117)
(1)求证:四边形ABCD是正方形.
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54275b7e571660d0a9e0370fbfe5050b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb909eaf6572dc2a0cac7557cb91d2cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
(3)借助上面问题的解题思路,解决下列问题:
若在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56762ae1533ff0f2ef8b9db154cb2ef2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b51d3992644d37dc71c9b5a97d515c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcad94426e61d0e86fe91574639cb52f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14a8d71c3a6c7d03ab048376ed552ac4.png)
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【推荐2】在正方形中,点
为正方形
内一点,过点
将
绕点
逆时针旋转
,得到
,延长
,分别交
,
于
、
两点,交
的延长线于点
.
(1)数学兴趣小组探究发现,如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f40b3bf6b27f936e0747de92151a1f77.png)
(2)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10bd69aa19a5f8414f2ffb2a228b5e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcdae78f4d3b8d8213ac3ac9a9567eb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
(3)如图
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1bd75fbe8bec72e27a3b3b6d48f138.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d570746d8a0a672d5e34054d758b1954.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba587b5260fd895cfbed46b68c1acf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/110e329d74716ab387dc602bb2b4f998.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
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【推荐1】如图1,抛物线
与x轴交于A、B两点,与y轴交于C点,连接
、
,已知点A、C的坐标为
、
.
![](https://img.xkw.com/dksih/QBM/2020/5/20/2466888759582720/2467536268279808/STEM/fd024a83-e15b-4d2a-901d-88ffd786c805.png?resizew=458)
(1)求抛物线的表达式;
(2)点P是线段
下方抛物线上的一动点,如果在x轴上存在点Q,使得以点B、C、P、Q为顶点的四边形为平行四边形,求点Q的坐标;
(3)如图2,若点M是
内一动点,且满足
,过点M作
,垂足为N,设
的内心为I,试求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e59da5115d0dafea24822245f92c48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913f78382630e50543e5f7192cae3ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f70930729a064c36565cab291b23b838.png)
![](https://img.xkw.com/dksih/QBM/2020/5/20/2466888759582720/2467536268279808/STEM/fd024a83-e15b-4d2a-901d-88ffd786c805.png?resizew=458)
(1)求抛物线的表达式;
(2)点P是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(3)如图2,若点M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bbf9680f74a9ac5d934304654ce2771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f216d86d74d6c2c84f26681c6429750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a646fb1459ac2adb931234b6e4f57a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98013a5042685a1db94249e70c62c09a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c845bb8ceaa4caef3af4f1e4366b49.png)
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【推荐2】如图1,已知抛物线
:
与x轴交于点
和点
,与y轴交于点C.
![](https://img.xkw.com/dksih/QBM/2022/12/18/3133704396890112/3134795570126848/STEM/34a6467ffa9543c39ad1ab5677fb92e4.png?resizew=319)
(1)求抛物线的解析式;
(2)点P在抛物线上,若
的内心恰好在y轴上,求出点P的坐标;
(3)如图2,将抛物线
向右平移一个单位长度得到抛物线
.点M,N都在抛物线
上,且分别在第四象限和第二象限,若
,求证:直线
经过一定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9553fb9beb9ed49ea5f7a0f077884d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ff2dba976c68740bbff0d1dda6a870c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f0e78c2a6a6736652c0246e2af6177.png)
![](https://img.xkw.com/dksih/QBM/2022/12/18/3133704396890112/3134795570126848/STEM/34a6467ffa9543c39ad1ab5677fb92e4.png?resizew=319)
(1)求抛物线的解析式;
(2)点P在抛物线上,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147de24f071e316b68fd2e78e3c84545.png)
(3)如图2,将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed533df5a76cc6fdd3e0741440b597dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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