如图:数轴上有三个点A、B、C,表示的数分别是-3、-1、4,请回答:
①当A、B不动时,若使C、B两点的距离是A、B两点距离的2倍,则需要将点C向左移动 个单位;
②若在B点处有一只小青蛙,一步跳1个单位长,小青蛙第1次先向左跳1步,第2次再向右跳3步,然后第3次再向左跳5步,第4次再向右跳7步,…,按此规律继续跳下去,那么跳第2020次时,落脚点表示的数是 ;
③数轴上有两个动点P、Q,其中点P从A点出发,以2个单位/秒的速度向右运动,在经过BC线段时,速度增加了1倍,经过BC之后又恢复了原来的速度,点Q从C点同时出发以3个单位/秒的速度向右运动,设运动时间为t秒,则当t为何值时,P、Q两点之间的距离等于7.5个单位.
①当A、B不动时,若使C、B两点的距离是A、B两点距离的2倍,则需要将点C向左移动 个单位;
②若在B点处有一只小青蛙,一步跳1个单位长,小青蛙第1次先向左跳1步,第2次再向右跳3步,然后第3次再向左跳5步,第4次再向右跳7步,…,按此规律继续跳下去,那么跳第2020次时,落脚点表示的数是 ;
③数轴上有两个动点P、Q,其中点P从A点出发,以2个单位/秒的速度向右运动,在经过BC线段时,速度增加了1倍,经过BC之后又恢复了原来的速度,点Q从C点同时出发以3个单位/秒的速度向右运动,设运动时间为t秒,则当t为何值时,P、Q两点之间的距离等于7.5个单位.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/6/55f4b416-6272-4618-a11a-1cb6105f76a8.png?resizew=333)
更新时间:2020-11-19 22:19:18
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【推荐1】如图,点A表示数
,点B表示数
.解答下列问题:
(1)求A,B两点之间的距离;
(2)数轴上,与A,B两点距离相等的点所表示的数是______;
(3)若将数轴折叠,使点B与数轴上4所对应的点重合,求与点A重合的点所表示的数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
(1)求A,B两点之间的距离;
(2)数轴上,与A,B两点距离相等的点所表示的数是______;
(3)若将数轴折叠,使点B与数轴上4所对应的点重合,求与点A重合的点所表示的数.
![](https://img.xkw.com/dksih/QBM/2020/11/23/2599171802193920/2599247886630912/STEM/045786d9-706e-4a62-8e9c-2eee89c9748e.png)
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【推荐2】如图,已知点
,
,
是数轴上的三个点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/6/782c3a33-93d5-4c1c-a61d-5d33032bce1b.png?resizew=374)
(1)请直接写出点
,
所表示的数;
(2)在此数轴上有点
,
,
三个动点同时出发运动,其中,动点
从点
出发,以每秒1个单位长度的速度沿数轴向左运动;动点
,
分别从点
,
处同时出发,分别以每秒2个单位长度和5个单位长度的速度沿数轴向右运动.
①写出运动
秒时,点
所表示的数(用含有点
的式子表示);
②若点
与点
之间的距离表示为
,点
与点
之间的距离表示为
.试探究:
的值是否随时间
的变化而变化?若变化,请说明理由;若不变,请求其常数值.
![](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://img.xkw.com/dksih/QBM/editorImg/2023/12/6/782c3a33-93d5-4c1c-a61d-5d33032bce1b.png?resizew=374)
(1)请直接写出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)在此数轴上有点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
①写出运动
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
②若点
![](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/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d29d8e6a64700e9ecc7071c6f4b43b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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【推荐3】在数轴上,点表示的数为0,点
表示的数为
. 给出如下定义:对于该数轴上的一点
与线段
上一点
,如果线段
的长度有最大值,那么称这个最大值为点
与线段
的“闭距离”. 如图1,若
,点
表示的数为3,当点
与点
重合时,线段
的长最大,值是4,则点
与线段
的“闭距离”为4.
(1)如图2,在该数轴上,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①当时,点
与线段
的“闭距离”为___________;
②若点与线段
的“闭距离”为3,求
的值;
(2)在该数轴上,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93129dde5fa5cd84e3702e457535e274.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb207ef1a0421223a7265409fc43867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf3369e0ea90e8d5cf4b6b3c45c0fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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【推荐1】【建立模型】
数轴上两点
,
所表示的数分别为
,
,
.
(1)若
,
两点到原点的距离相等,
,请画出数轴,并标出
,
两点的位置;
(2)请写出
与
之间的数量关系,当
时,求
的值;
【拓展延伸】
(3)如图,数轴上两点
,
所表示的数分别为
,4,点
,
是数轴上两动点,点
从点
出发以每秒1个单位的速度向
运动,同时点
从
点出发以每秒2个单位的速度向
运动,当
时,求此时
点对应的数.
数轴上两点
![](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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc34db5860990e51ba31edc8cdd077c2.png)
(1)若
![](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/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)请写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
【拓展延伸】
(3)如图,数轴上两点
![](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/01317332a203c898536b1d0459f51d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/acc290b44635265137fdf13146b6a6d9.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/f4d14c6959273338a048b023805cce80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/20/6f556364-b16e-45ec-86c6-3d0c4f2dbc1c.png?resizew=256)
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【推荐2】根据给出的数轴及已知条件,解答下面的问题:
![](https://img.xkw.com/dksih/QBM/2020/1/10/2374168053112832/2374857054289920/STEM/7d500938-8758-47a5-a124-5032d535e92d.png)
(1)已知点A,B,C表示的数分别为1,
,-3.观察数轴,与点A的距离为3的点表示的数是 ,A,B两点之间的距离为 。
(2)数轴上,点B关于点A的对称点表示的数是 ;
(3)若将数轴折叠,使得A点与C点重合,则与B点重合的点表示的数是 ;若此数轴上M,N两点之间的距离为2019(M在N的左侧),且当A点与C点重合时,M点与N点也恰好重合,则点M表示的数是 ,点N表示的数是 。
(4)若数轴上P,Q两点间的距离为a(P在Q的左侧),表示数b的点到P,Q的两点的距离相等,将数轴折叠,当P点与Q点重合时,点P表示的数是 ,点Q表示的数是 (用含a,b的式子表示这两个数)。
![](https://img.xkw.com/dksih/QBM/2020/1/10/2374168053112832/2374857054289920/STEM/7d500938-8758-47a5-a124-5032d535e92d.png)
(1)已知点A,B,C表示的数分别为1,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f28cd36368205f41ddbb20c42c6fa7e9.png)
(2)数轴上,点B关于点A的对称点表示的数是 ;
(3)若将数轴折叠,使得A点与C点重合,则与B点重合的点表示的数是 ;若此数轴上M,N两点之间的距离为2019(M在N的左侧),且当A点与C点重合时,M点与N点也恰好重合,则点M表示的数是 ,点N表示的数是 。
(4)若数轴上P,Q两点间的距离为a(P在Q的左侧),表示数b的点到P,Q的两点的距离相等,将数轴折叠,当P点与Q点重合时,点P表示的数是 ,点Q表示的数是 (用含a,b的式子表示这两个数)。
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【推荐3】如图,
、
两点在数轴上,这两点在数轴对应的数分别为
、
.点
、
分别从
,
两点同时出发,在数轴上运动,它们的速度分别是
个单位/秒、
个单位/秒,它们运动的时间为
秒,
点对应的数是
.(规定:数轴上两点
,
之间的距离记为
)
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599806768799744/2600037854781440/STEM/cff2a50d22eb48a2a94fcc3cf9d41a35.png?resizew=326)
(1)如果点
、
在
、
之间相向运动,当它们相遇时,
_____,此时点
所走的路程为______,点
所走的路程为______,则点
对应的数是_______;
(2)如果点
、
都向左运动,当点
追上点
时,求点
对应的数;
(3)如果点
、
在点
、
之间相向运动,当
时,求
点对应的数;
![](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/95e35f76e01c3979ae5987f7729f9856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c748e40ba21ac5063d3bccaa57ef278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2020/11/24/2599806768799744/2600037854781440/STEM/cff2a50d22eb48a2a94fcc3cf9d41a35.png?resizew=326)
(1)如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/825116eb345f5505ebc8c1cdb8a1f131.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(3)如果点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/eb30cb3a151041b0e9914ad9ef6f96de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
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解答题-计算题
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【推荐1】芳芳同学考试中有一道题的解题过程如下:
计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d85bfbc0fc5ccb433eebea0f2ec014b.png)
解:原式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ffd2c83a2a3098f8bf54e08272bed43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f383a24fb58e51c3b017212c77fb96bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd7f8a21acc09bd31a9e28dfbb8775f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/759232deee1005cca3cfb41fcc1abd56.png)
请判断芳芳解题过程是否正确,若正确,请说明解题过程中运用的运算律;若不正确,请说明理由,并写出正确的解题过程.
计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d85bfbc0fc5ccb433eebea0f2ec014b.png)
解:原式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ffd2c83a2a3098f8bf54e08272bed43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f383a24fb58e51c3b017212c77fb96bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd7f8a21acc09bd31a9e28dfbb8775f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/759232deee1005cca3cfb41fcc1abd56.png)
请判断芳芳解题过程是否正确,若正确,请说明解题过程中运用的运算律;若不正确,请说明理由,并写出正确的解题过程.
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名校
【推荐2】观察下列等式:
第
个等式:
;第
个等式:
;
第
个等式:
;第
个等式:
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
请回答下列问题:
(1)按以上规律列出第
个等式:
_________
_________;
(2)用含
的代数式表示第
个等式:
_________
_________
为正整数
;
(3)求
的值.
(4)求
的值
第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f22524595a3d43d081d767909d442244.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a4204dccc48346201c0a41c0eebad9.png)
第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0364ed858a3be93fa45029f8686131a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ab108e37fb6db079bc70b8549459c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
请回答下列问题:
(1)按以上规律列出第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dbd9ff686703cad03aa383e5fec21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(2)用含
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3231e8510ad0591347ea58faeb675b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551aefc008bbd69bb2f8d8e384bb68c0.png)
(4)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fd9daf79e8f9d8baad92a665008c261.png)
您最近一年使用:0次
解答题-问答题
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适中
(0.65)
【推荐1】(1)已知:
是关于x的方程
的解,求k的值.
(2)在(1)的条件下,已知线段
cm,点C是直线AB上一点,且
,若点D是
的中点,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba53065eb180a682305fddb95d14b62f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6d4454799c65bff8b6ba26c73f6bd17.png)
(2)在(1)的条件下,已知线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78b65065ec3a0cb4b050989165c003d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f999abe4f4c046b42d3a160ac03dc3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
您最近一年使用:0次