已知A、
两地相距
,甲乙两人沿同一条路线从A地到
地.甲先出发,匀速行驶,甲出发1小时后乙再出发,乙以
的速度匀速行驶1小时后提高速度并继续匀速行驶,结果比甲提前到达.甲、乙两人离开A地的距离
与时间
的关系如图所示.
(1)甲的运动速度是________
;乙在
至
之间的速度是________
;
(2)甲出发多少小时后和乙相遇?
(3)请直接写出甲乙相距
时甲行驶的时间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0ead65871b1bf2e0a850566e2e1c8cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62d15d4aa6492374807cfd543f3d0721.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f98020c762bb0bd7f24f82f927be8227.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a376791a014497632cd7435dc83f4e31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/12/a63014f1-94ec-46f8-86c4-952be3ef1e01.png?resizew=176)
(1)甲的运动速度是________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca55c030e7d88040525c4fb9a278f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c647c64600a583a91bb8bb6d3c06441.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c63f6b1652d3e830ed2dbc65253d043.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ca55c030e7d88040525c4fb9a278f8.png)
(2)甲出发多少小时后和乙相遇?
(3)请直接写出甲乙相距
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26016c9a610be4da74086a37c3327d8.png)
更新时间:2023-07-30 20:18:47
|
相似题推荐
解答题-作图题
|
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名校
【推荐1】探究函数性质时,我们经历了列表、描点、连线画出函数图象,观察分析图象特征,概括函数性质的过程.结合已有经验,请画出函数
的图象,并探究该函数性质.
(1)绘制函数图象
①列表:下列是x与y的几组对应值,其中
___________,
____________.
②描点:请根据表中所给的数值在图中描点;
③连线:请结合反比例函数图象的特征,画出函数图象;
①当
时,函数值y随着自变量x的增大而______________;(填“减小”或“增大”)
②函数的图象关于___________对称;
(3)运用函数图象及性质
①点
,
,
在函数图象上,请比较
,
,
的大小( )
A.
B.
C.
D.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83d790248a1aba9266fb9003cf0972d.png)
②点
,
在函数图象上,请比较
,
的大小( )
A.
B.
C.
D.不确定
③写出方程
的解_____________;
④写出不等式
的解集___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7c985cc24fa29287daf84ce9861dabb.png)
(1)绘制函数图象
①列表:下列是x与y的几组对应值,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
![]() | …… | -5 | -4 | -3 | -2 | -1 | 1 | 2 | 3 | 4 | 5 | …… |
![]() | …… | -3.8 | -2.5 | -1 | 1 | 5 | 5 | ![]() | -1 | ![]() | -3.8 | …… |
③连线:请结合反比例函数图象的特征,画出函数图象;
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
②函数的图象关于___________对称;
(3)运用函数图象及性质
①点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0db827919b39706f996ae9d5e4b4b1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62813c93d59bf67fc00bd69b6c439ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e05c4458fbdca1f4512ab537bcbdd2ee.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/9314bd1d7a6e070f4f2428f9a321804e.png)
A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b44c63a912c9f07b80fb8f5bdde7a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d4557a97a17857a08aeb0a39489f10b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da51248832d1ef41e0577d630969783d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83d790248a1aba9266fb9003cf0972d.png)
②点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1310445f6dd61d45ef154078adc250be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14c7d6ad995d9fcec91ea69306eb2e3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2210f152080d9a68a97c805f5c1cde96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f333263260646c494225db8a7476c00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d8dafc71b106f39f4e15442220897b.png)
③写出方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e8199c061c1cb8ef1680e2995bc3aa.png)
④写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c691fb137faf605c58bd2c2519920d1.png)
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【推荐2】“龟兔赛跑”的故事同学们都非常熟悉,图中的线段OD和折线OABC表示“龟兔赛跑”时路程与时间的关系,请你根据图中给出的信息,解决下列问题.
(1)线段OD表示赛跑过程中 的路程与时间的关系.(填“乌龟”和“兔子”)赛跑的全程是 米.
(2)兔子在起初每分钟跑______米,乌龟每分钟爬_________米.
(3)兔子醒来,以800米/分的速度跑向终点,结果还是比乌龟晚到了0.5分钟,请你算算兔子中间停下睡觉用了多少分钟?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/3/aa4124e3-1d0d-45ee-9c7b-320e33b09212.png?resizew=202)
(1)线段OD表示赛跑过程中 的路程与时间的关系.(填“乌龟”和“兔子”)赛跑的全程是 米.
(2)兔子在起初每分钟跑______米,乌龟每分钟爬_________米.
(3)兔子醒来,以800米/分的速度跑向终点,结果还是比乌龟晚到了0.5分钟,请你算算兔子中间停下睡觉用了多少分钟?
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【推荐3】已知甲,乙两地相距
km,一辆轿车从甲地出发前往乙地,到达乙地后立即按原路原速返回甲地.一辆货车与轿车同时出发,以
km/h的速度沿同一条公路从乙地前往甲地,途经服务区时货车停车装货耗时
分钟.待装货完毕,货车立即调整车速继续匀速前往甲地,最后与轿车同时到达甲地.如图是两车离乙地的距离
(km)与货车行驶时间
(h)之间的函数图象,结合图象回答下列问题:
![](https://img.xkw.com/dksih/QBM/2024/1/24/3417974659268608/3436675388801024/STEM/7108d0a2418a41a5b845f3e037f09a8b.png?resizew=206)
(1)轿车的速度是______km/h,
______;
(2)在图中补全货车行驶过程的函数图象.
(3)在装货完毕后,货车与轿车何时相距
km?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac9db58aa1e9c1383f0729461fa2fcde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f959e5f8d89390f0f136f6acc9f6fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53c7539ed297ea63b9ace6f5cc58ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://img.xkw.com/dksih/QBM/2024/1/24/3417974659268608/3436675388801024/STEM/7108d0a2418a41a5b845f3e037f09a8b.png?resizew=206)
(1)轿车的速度是______km/h,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
(2)在图中补全货车行驶过程的函数图象.
(3)在装货完毕后,货车与轿车何时相距
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17e85c53a287e873f35c9ca64972023c.png)
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解题方法
【推荐1】在平面直角坐标系
中,对于点
与
,给出如下的定义:
将过点
的直线记为
,若直线
与
有且只有两个公共点,则称这两个公共点之间的距离为直线
与
的“穿越距离”,记作
.
例如,已知过点
的直线
与
,其中
,
,
,
,如图所示,则
.
![](https://img.xkw.com/dksih/QBM/2021/7/7/2759146477051904/2761349566636032/STEM/82381379-4b96-46cd-8daa-ba0021d06a41.png)
请解决下面的问题:
已知
,其中
,
,
,
.
(1)当
时,已知
,
为过点
的直线
.
①当
时,
________________;当
时,
________________;
②若
,结合图象,求
的值;
(2)已知
,
为过点
的直线,若
有最大值,且最大值为
,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
将过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfd3fc1c5776e964146498d94904045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfd3fc1c5776e964146498d94904045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcfd3fc1c5776e964146498d94904045.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2baa4f911d584e11d2aea4d8efce3055.png)
例如,已知过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f440e6ea70abf58edfb861ab34e21f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9793218daaad4758ad4d2f594f7651d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76efcc79dc6f4c7271878e3cf938e5e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c448d4051ef203392d19fb366dd85f79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffe9dcfdbc4cccdac707232b6092617.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036385efb9fc3a29dcd1eda14d527a4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9306ea053872e5df956173712431615e.png)
![](https://img.xkw.com/dksih/QBM/2021/7/7/2759146477051904/2761349566636032/STEM/82381379-4b96-46cd-8daa-ba0021d06a41.png)
请解决下面的问题:
已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115a0c87ac14dbb770c95d74d6e26073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1e5eea5f7f98ca8632358b7e49ceb25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30252a6667c56bd45efea85f92786ab7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e8c3f32f5300d4e85298e8317f79250.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66884efff7400f92b530d69d029778d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3ccc38868099bc4d542e00e0b66685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a3a859685f6b2498bcacd8e29d47f00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a882037b9ce104ecc496e0f31a139361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2d241c90697b11bd5bf0e22313eb64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b2d241c90697b11bd5bf0e22313eb64.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb172853a383e72081a10e110d5f8670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d8350efd6636002f417d721fc87a126.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c21f3f69d0092453a16972f42939b7b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878dda0339797b2f1631cd8f78626252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b91d650c2fc1a741fabdb333b09aeb6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐2】借鉴我们已有的研究函数的经验,探索函数y=|x2﹣2x﹣3|﹣2图象和性质,探究过程如下,请补充完整.
(1)自变量x的取值范围是全体实数,x与y的几组对应值列表如下:
其中,m= ,n= ;
(2)根据上表数据,在如图所示的平面直角坐标系中描点,并画出函数图象;
![](https://img.xkw.com/dksih/QBM/2020/6/10/2481412929421312/2483941216632832/STEM/ac1da0a8723d4eeba1af9a46f033600a.png?resizew=298)
(3)观察函数图象:
①当方程|x2﹣2x﹣3|=b+2有且仅有两个不相等的实数根时,根据函数图象直接写出b的取值范围为 .
②在该平面直角坐标系中画出直线y=
x+2的图象,根据图象直接写出该直线与函数y=|x2﹣2x﹣3|﹣2的交点横坐标为: (结果保留一位小数).
(1)自变量x的取值范围是全体实数,x与y的几组对应值列表如下:
x | … | ﹣3 | ﹣2 | ﹣1 | 0 | 1 | 2 | 3 | 4 | 5 | … |
y | … | 10 | m | ﹣2 | 1 | n | 1 | ﹣2 | 3 | 10 | … |
其中,m= ,n= ;
(2)根据上表数据,在如图所示的平面直角坐标系中描点,并画出函数图象;
![](https://img.xkw.com/dksih/QBM/2020/6/10/2481412929421312/2483941216632832/STEM/ac1da0a8723d4eeba1af9a46f033600a.png?resizew=298)
(3)观察函数图象:
①当方程|x2﹣2x﹣3|=b+2有且仅有两个不相等的实数根时,根据函数图象直接写出b的取值范围为 .
②在该平面直角坐标系中画出直线y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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【推荐3】学完二次根式一章后,小易同学看到这样一题:“函数
中,自变量
的取值范围是什么?”这个问题很简单,根据二次根式的性质很容易得到自变量
的取值范围.联想到一次函数,小易想进一步研究这个函数的图象和性质.以下是他的研究步骤:
第一步:函数
中,自变量
的取值范围是_____________.
第二步:根据自变量取值范围列表:
__________.
第三步:描点画出函数图象.
在描点的时候,遇到了
,
这样的点,小易同学用所学勾股定理的知识,找到了画图方法,如图所示:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/eeadd01a-8131-4368-a0b4-2de111a7d853.png?resizew=210)
你能否从中得到启发,在下面的
轴上标出表示
、
、
的点,并画出
的函数图象.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/bab6cdac-40e1-43fc-a9cf-b6f38a5b57ec.png?resizew=264)
第四步:分析函数的性质.
请写出你发现的函数的性质(至少写两条):
____________________________________________________________________________________________
____________________________________________________________________________________________
第五步:利用函数
图象解含二次根式的方程和不等式.
(1)请在上面坐标系中画出
的图象,并估算方程
的解.
(2)不等式
的解是__________________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf2eba6a3b353cd10cc286e63ca5c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
第一步:函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf2eba6a3b353cd10cc286e63ca5c7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
第二步:根据自变量取值范围列表:
![]() | -1 | 0 | 1 | 2 | 3 | 4 | ⋯⋯ |
![]() | 0 | 1 | ![]() | ![]() | 2 | ![]() | ⋯⋯ |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
第三步:描点画出函数图象.
在描点的时候,遇到了
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38620d68461307e424923b903ab518f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d1a2d4486d45d9d401743e8978eb8a9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/eeadd01a-8131-4368-a0b4-2de111a7d853.png?resizew=210)
你能否从中得到启发,在下面的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf2eba6a3b353cd10cc286e63ca5c7f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/2/bab6cdac-40e1-43fc-a9cf-b6f38a5b57ec.png?resizew=264)
第四步:分析函数的性质.
请写出你发现的函数的性质(至少写两条):
____________________________________________________________________________________________
____________________________________________________________________________________________
第五步:利用函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf2eba6a3b353cd10cc286e63ca5c7f.png)
(1)请在上面坐标系中画出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc64f78b1e12777a31d48f04a866a5c.png)
(2)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf833cd086e733a7111cfd3ab924b24.png)
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名校
【推荐1】已知直线
和直线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89db2979786a298f02a1987c02a7b7f.png)
不论
为何值,直线
恒交于一定点
,求
点坐标;
当
时,设直线
与
轴围成的三角形的面积分别为
, 求
.
设直线
交
轴为
点,交
轴为
点,原点为
的面积为
.
求①当
时直线
的条数各是多少;
②当
且
时
的函数解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034716d00da53a2e8b3579ecd78c1a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89db2979786a298f02a1987c02a7b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.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/1f53190d6ead827a6338b9de847aeaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/510d203c6359d1d71bc70114a3a255bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b54c0786b7dd59fa022e2ab6bec43d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5c344d078f9d01d9a4655a0323c59cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f62295c36d2e2174908c2bec0eb5b30f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669f36db5e2e8efcd5a2c61efd481f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
求①当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fd6b613814cd02c4060ae0cf958a93d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
②当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c343fddb5d98905bb22b9b08b15f3d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
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【推荐2】如图1,在平面直角坐标系中,直线
与x轴交于点A,与y轴交于点B,并与直线
相交于点C.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/c6edda93-f4bf-4a62-ace0-742ac47a5ba0.png?resizew=269)
(1)点C的坐标为______;(直接写出结果)
(2)如图2,点D在点C右侧的x轴上,过点D作x轴的垂线与直线
交于点E,与直线
交于点F,且
.
①求点E的坐标;
②若点M是射线
上的动点,连结
,并在
左侧作等腰直角
,当顶点P恰好落在直线
上时,求出对应的点M的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e434a6fc177990ab7f2b604c111e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b78c13e8df52982d8d29e17a60cb459.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/c6edda93-f4bf-4a62-ace0-742ac47a5ba0.png?resizew=269)
(1)点C的坐标为______;(直接写出结果)
(2)如图2,点D在点C右侧的x轴上,过点D作x轴的垂线与直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6a028fd5b281ef168702a803baca6e8.png)
①求点E的坐标;
②若点M是射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccaee8f228ff24e7c89879bb5b999cf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2e2c0d4ac2bd79f6cea7a9b1a50662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4d5540930e71aed008b17277d8b0d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
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【推荐3】【数学问题】在同一直角坐标系内直线
与
,当
满足什么条件时,这两条直线互相垂直?
探究问题:我们采取一般问题特殊化的策略来进行探究.
探究一:如图①,在同一直角坐标系内直线
与
有怎样的位置关系?
解:如图①,设点
在直线
上,则点
一定在直线
上.过点
分别作
的垂线,垂足分别为
.
则
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1afbef05bb4aaa90fdd94cbd291bcef.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e8eeb6483be5c18c6e465a2dba47e39.png)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d993921e3533029839097da1f7f9fd84.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e21aa38de80da8ccaa7ce51595e7bd.png)
所以,在同一直角坐标系内直线
与
互相垂直.
![](https://img.xkw.com/dksih/QBM/2020/3/26/2427724473851904/2428520414240768/STEM/f3c155100fd84b759d28d263ef6a28dc.png?resizew=427)
探究二:如图②,在同一直角坐标系内直线
上,则点
一定在直线
上.过点
分别作
轴的垂线,垂足分别为
.
∵
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415d776550bdf502e3e81c97ca008593.png)
∴
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c01457bd29d68dab3992c3163a858bda.png)
又∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3615de1c2bfd1a37a179ea901353c71.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3824b1d9b034acb739aa0e58f6ac1a9.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b43fca787d32881e7e9a0cc7128cebc.png)
又∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7475442b87f54abebb76b922288d45.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87622eb23eac30dc0c2be7c0a7eff8a9.png)
∵![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d993921e3533029839097da1f7f9fd84.png)
∴![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e21aa38de80da8ccaa7ce51595e7bd.png)
所以,在同一直角坐标系内直线
与
互相垂直.
探究三:如图③,在同一直角坐标系内直线
与
有怎样的位置关系?
(仿照上述方法解答,写出探究过程)
(1)在同一直角坐标系内直线
与
,当
满足数量关系为 时,这两条直线互相垂直.
(2)在同一直角坐标系内已知直线
与直线
,使它与直线
互相垂直,
的值为: ;两直线垂足的坐标为: .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdaf3914f625c7535a8ddc019ff4cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59407529a58b68c4da3f143ad94d6063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6397afb309b18e6d8a98e1c7e62cfa61.png)
探究问题:我们采取一般问题特殊化的策略来进行探究.
探究一:如图①,在同一直角坐标系内直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
解:如图①,设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1390158a5cbca12735090a5a416211f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25e433ad8e7291ee84e8ada36d71d2c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a5b099b9112ed6a9f71b4a65875ccf.png)
则
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c357a97b6969c7a7beb6fc1fe1db0757.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1afbef05bb4aaa90fdd94cbd291bcef.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e8eeb6483be5c18c6e465a2dba47e39.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d993921e3533029839097da1f7f9fd84.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e21aa38de80da8ccaa7ce51595e7bd.png)
所以,在同一直角坐标系内直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f5191798242b7b9b88a75e17e4425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1d8d5cea065075fe50706abe3ae802.png)
![](https://img.xkw.com/dksih/QBM/2020/3/26/2427724473851904/2428520414240768/STEM/f3c155100fd84b759d28d263ef6a28dc.png?resizew=427)
探究二:如图②,在同一直角坐标系内直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/195cc6f31228ee91ccd842114d0faa28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38cd2a180ae300bbf2388a709e4c28e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a5b099b9112ed6a9f71b4a65875ccf.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93729b00d0704ba4065eda75a9621619.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f3b60be483b974d8ebe16067738903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72ecfe510749cc7dac9481a4ceb9b068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/415d776550bdf502e3e81c97ca008593.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76ae5016a8892dc27a1f146ebbe775d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c01457bd29d68dab3992c3163a858bda.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3615de1c2bfd1a37a179ea901353c71.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3824b1d9b034acb739aa0e58f6ac1a9.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b43fca787d32881e7e9a0cc7128cebc.png)
又∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7475442b87f54abebb76b922288d45.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87622eb23eac30dc0c2be7c0a7eff8a9.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d993921e3533029839097da1f7f9fd84.png)
∴
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e21aa38de80da8ccaa7ce51595e7bd.png)
所以,在同一直角坐标系内直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08b9f0b9e53a83e68f5fec944f343119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38cd2a180ae300bbf2388a709e4c28e6.png)
探究三:如图③,在同一直角坐标系内直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9a9b769d70cb6f29e965c800921c8ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c50c02c42ef79e94feb3286dfc0707.png)
(仿照上述方法解答,写出探究过程)
(1)在同一直角坐标系内直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdaf3914f625c7535a8ddc019ff4cba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59407529a58b68c4da3f143ad94d6063.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6397afb309b18e6d8a98e1c7e62cfa61.png)
(2)在同一直角坐标系内已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad03dd880c0b2c5641f10376438393a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633cb79c1e44ca4ef401331bf055e889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/633cb79c1e44ca4ef401331bf055e889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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【推荐1】已知A,B两地相距
,甲、乙两人沿同一条公路匀速从A地出发到B地,甲骑摩托车,乙骑自行车,设乙行驶的时间为
,甲乙两人之间的距离为
,y与t的函数关系如图所示.请观察分析图象解决以下问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/76852926-18d1-4347-9ddf-e90d7ee79969.png?resizew=258)
(1)乙比甲先出发________小时,甲骑摩托车的速度是______
,第一次相遇的时间在乙出发______小时.
(2)当
时,求t的取值范围;
(3)若甲到达B地后立即原路返回,返回途中甲乙何时相距
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89789143aab8238a733c7c06591ae735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c86f7c944dc1784ede8e72ebc5ee88c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005ae1a5d2859e76454407f92b65c709.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/76852926-18d1-4347-9ddf-e90d7ee79969.png?resizew=258)
(1)乙比甲先出发________小时,甲骑摩托车的速度是______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd9242efa2facde4d7c79ff0c1b00ea.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8558a62cb24ab6c77dbd099144b7697.png)
(3)若甲到达B地后立即原路返回,返回途中甲乙何时相距
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3fb33e7fb8709bd8d5db686644d50b.png)
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【推荐2】小明和小红两同学分别从甲地出发,沿同一条道路骑自行车到乙地参加社会实践活动,小明同学先从甲地出发,
小时后小红出发.小明和小红距甲地的距离
(千米)与小明出发的时间
(小时)之间的函数图象如图所示.
(2)当
时,求小明距甲地的距离
与
之间的函数关系式;
(3)当小红到达乙地时,求小明距乙地的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ec818fc0754296163206e1e8870f9e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b96515e681c586745cc279805f2218fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)当小红到达乙地时,求小明距乙地的距离.
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