2022七年级上·全国·专题练习
1 . 讨论方程
的解的情况.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d8ecb4513319c914d5ab021831a699.png)
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2 . 阅读理解:对于有理数a、b,
的几何意义为:数轴上表示数a的点到原点的距离;
的几何意义为:数轴上表示数a的点与表示数b的点之间的距离.如:
的几何意义即数轴表示数x的点与表示数2的点之间的距离,请根据你的理解解答下列问题:
(1)
的几何意义:_____________;若
,那么x的值是_________.
(2)
的几何意义:________________;
的最小值是______________
(3)
的最小值是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8d40e257f9c446b8e30fa841b74bbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a13880b9454c5942f164d934b1834783.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b4feb90b84eb54fe644c596f5156a1.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b90f5a50cabc6cad1b36bf25fc6d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44e81ab242395d0fd0f0fa974ca5f02e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a17edc04a94fa3702cd2ce0d69829e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a17edc04a94fa3702cd2ce0d69829e3.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34868d6b37e597a0fb01b10ca3ea51ac.png)
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2022-11-26更新
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5卷引用:湖南省邵阳市洞口县2022-2023学年七年级上学期数学期中试题
湖南省邵阳市洞口县2022-2023学年七年级上学期数学期中试题湖南省邵阳市邵东县城区中学联考2022-2023学年七年级上学期期中考试数学试题(已下线)专题04 有理数章节压轴题专项训练-【好题汇编】备战2023-2024学年七年级数学上学期期中真题分类汇编(人教版)(已下线)湖南省邵阳市新邵县2023-2024学年七年级上学期期中数学试题江西省吉安市第八中学2023-2024学年七年级下学期开学考试数学试题
3 . 对于有理数
,
,
,
,若
,则称
和
关于
的“相对关系值”为
,例如,
,则2和3关于1的“相对关系值”为3.
(1)
和6关于2的“相对关系值”为_____;
(2)若
和3关于1的“相对关系值”为7,求
的值;
(3)若
和
关于1的“相对关系值”为1,
和
关于2的“相对关系值”为1,
和
关于3的“相对关系值”为1,
,
和
关于101的“相对关系值”为1.
①
的最大值为_____;
②直接写出所有
的值.(用含
的式子表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4d459932ce98edc932c3e300cbf9e5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc6d4cc31ddbefbf046c36bb430f3fd.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07096af3b99fd1cb11c31f19a2c6408e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89fe44dab672c37b60f97de0040be87a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2344f4d2455e19a0e16f21efd75e9991.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222c12bccd0b40100273e4a4f7aa3948.png)
②直接写出所有
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee2ad1fb42798995e4834ca8a57c8a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
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4 . 如图,将等边
放在数轴上,点B与数轴上表示
的点重合,点C与数轴上表示2的点重合,将数轴上表示2以后的正半轴沿
进行折叠.经过折叠后,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/1146e9b5-3ac2-4581-af29-07cae64346be.png?resizew=367)
(1)点A、点B分别与正半轴上表示哪个数的点重合?
(2)若点D为
的中点,点E表示
.折叠数轴上,记
为数轴拉直后点E到点A的距离,即
,其中
代表线段长度.若动点P从点D出发,沿
方向运动,动点Q从点E出发,沿
方向运动,当动点Q运动到点C时,P、Q同时停止运动.已知动点P在
上运动速度为1单位秒,在
上运动速度为2单位/秒;动点Q的运动速度为1单位/秒,设运动时间为t(秒).
①当t为何值时,动点P、Q表示同一个数.
②当t为何值时,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01317332a203c898536b1d0459f51d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2410ff5236b24ff24f2cb54c8e733f5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/1146e9b5-3ac2-4581-af29-07cae64346be.png?resizew=367)
(1)点A、点B分别与正半轴上表示哪个数的点重合?
(2)若点D为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d13ce3ebd1112220c639562739f1f9d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c015d62211a5ae99495d4d6e943dba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0621676eb0e454d808c27e500d4a0d55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e10c3995d6fd4234ce9d9bdb430fb0f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963e18a44d9e95c1ba2f1188115876d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddeb7da58ea6cd4d3c56082da60d8916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
①当t为何值时,动点P、Q表示同一个数.
②当t为何值时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/998801664eddc76a85c8f0a4a2f86ab7.png)
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5 . 已知点A,
在数轴上分别表示有理数
,
,A,
两点之间的距离表示为
.
(1)当A,
两点中有一点在原点时,不妨设点A在原点,如图1,
;
(2)当A,
两点都不在原点时,
①如图2,点A,
都在原点的右边,
;
②如图3,点A,
都在原点的左边,
;
③如图4,点A,
在原点的两边,
.
综上,数轴上A,
两点的距离
.
利用上述结论,回答以下三个问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/886ee14c-b46b-4e27-8aae-06061bbed66b.png?resizew=491)
(1)用绝对值表示
和
的两点之间的距离是________,若该距离为4,则
________;
(2)
的最小值是________,当取最小值时满足的整数
共有________个,其总和为________;
(3)若未知数
,
满足
,则代数式
的最大值是________,最小值是________.
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)当A,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f09d04217c41f68f53461d168332e224.png)
(2)当A,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
①如图2,点A,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e94d586928204a00b046109ef5f677.png)
②如图3,点A,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/488c6a991cad6193d4d7fa163c01b290.png)
③如图4,点A,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca3303b6fa5aa18200fd040c22fc439f.png)
综上,数轴上A,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2afd4acb164aad6d5a73989f5412730b.png)
利用上述结论,回答以下三个问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/886ee14c-b46b-4e27-8aae-06061bbed66b.png?resizew=491)
(1)用绝对值表示
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40cfb936d8d761ccbe51b7892bd898a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)若未知数
![](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/7f2308fa10e198eb22827a86fef05f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf99adccc80f28343fedd8d0aad7429.png)
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6 . 如图,已知在数轴上有三个点A、B、C,O是原点,满足
,动点P从点O出发向右以每秒
的速度匀速运动;同时,动点Q从点C出发,在数轴上向左匀速运动,速度为v;运动时间为t.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/c735aed1-9f10-4f7d-9d0b-d7ff6ce88322.png?resizew=158)
(1)求:点P从点O运动到点C时,运动时间t的值.
(2)若Q的速度v为每秒
,那么经过多长时间P,Q两点相距
?
(3)当
时,请求点Q的速度v的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dadfd77f71575026694d76eead78ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c78d0ab561d0c9bb9099772c596af8bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/c735aed1-9f10-4f7d-9d0b-d7ff6ce88322.png?resizew=158)
(1)求:点P从点O运动到点C时,运动时间t的值.
(2)若Q的速度v为每秒
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3668a3f3ce5b8a272ad92c2ebd233f5a.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4555d1075d7908a6b737851f80dc0d6b.png)
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7 . 定义新运算
,如
;
若
,则称a与b互为“望一”数;
若
,则称a与b互为“望外”数;
(1)计算:
.
(2)下列互为“望一”数的是 .互为“望外”数的是 .
①
;②
;③
;④
;⑤
;
(3)若
,则x可以取哪些整数?
(4)若
,则x的值为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2451ec50d72b28b8d0fc8399bae375ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f835055588e7a697ca877028c9d0b794.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/230a1563f517d23ec8122a1b0ddeca26.png)
若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77c10c57443f441d765369642f9e6af1.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8bf61ab86302a636b931f0cfa09db4b.png)
(2)下列互为“望一”数的是 .互为“望外”数的是 .
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16678b292e4955c093d5d0e98e9fa0f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386fa80fb7de578b7da16622c65f2f99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328886e35282c748b02058497de3f6e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/573ae5b56c9e772be93ff6606e08bb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df570c766821bf42180c54d60c7d41bc.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6627301bd3324073135115362376a650.png)
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c657ddb887aff3450b636685a710b107.png)
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2卷引用: 湖南省长沙市望城一中教育共同体2022-2023学年七年级上学期期中数学试卷
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8 . 对于有理数a,b,n,d,若
,则称a和b关于n的“相对关系值”为d,例如,
,则2和3关于1的“相对关系值”为3.
(1)
和6关于2的“相对关系值”为 ;
(2)若a和3关于1的“相对关系值”为7,求a的值;
(3)若
和
关于1的“相对关系值”为1,请求出
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd84741719a22af5ac3d671af99fb812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47fbba19405d71c259852344e314fa41.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edbd40e04e2a943051fa83d6e511add.png)
(2)若a和3关于1的“相对关系值”为7,求a的值;
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35f7dcce39f3d4dc6b7faf84dc1d0a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/222c12bccd0b40100273e4a4f7aa3948.png)
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9 . 阅读下列有关材料并解决有关问题.我们知道
,现在我们可以利用这一结论来化简含绝对值的代数式.例如:化简代数式
时,可令
和
,分别求得
和
(称-1,2分别为
与
的零点值).在有理数范围内,零点值
和
可将全体有理数分成不重复且不遗漏的如下3种情况:
,
,
.从而在化简
时,可分以下三种情况:①当
时,原式
;②当
时,原式
;③当
时,原式
.通过以上阅读,请你解决问题:
(1)
的零点值是__________.
(2)化简代数式
;
(3)解方程
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79daccd9d8f7475f602aacd720d81baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40cfb936d8d761ccbe51b7892bd898a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/122fa7155f6858a570e8dee2495822a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9378f4030a56301dfdf892c0b36182b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b90f5a50cabc6cad1b36bf25fc6d37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b4feb90b84eb54fe644c596f5156a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da6d82d173ad18cc040e94c925b5ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964fd15ed03eefd8a51b29e9e99deaf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27f27cbb8185c1974d715ff95f8801c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40cfb936d8d761ccbe51b7892bd898a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7da6d82d173ad18cc040e94c925b5ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d9fc52b1716c3f52c8da26734910d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/964fd15ed03eefd8a51b29e9e99deaf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3848cc09baf667d3ae1bc68de5ba9d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27f27cbb8185c1974d715ff95f8801c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/223b4a95b9a6b1fd4889858dc59ae425.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11822635696c011adda40dfbe67cd09b.png)
(2)化简代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11822635696c011adda40dfbe67cd09b.png)
(3)解方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53dded9e4e3d1d81a0163f3371357fb2.png)
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名校
10 . 已知数轴上两点A、B,若在数轴上存在一点C,使得
,则称点C为线段
的“n倍点”.例如如图1所示:当点A表示的数为
,点B表示的数为2,点C表示的数为0,有
,则称点C为线段
的“1倍点”.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/751be5de-6615-4b52-acb7-0810bd0d9d78.png?resizew=460)
请根据上述规定回答下列问题:
已知图2中,点A表示的数为
,点B表示的数为1,点C表示的数为x.
(1)当
时,点C (填“一定是”或“一定不是”或“不一定是”)线段
的“1倍点”;
(2)若点C为线段
的“n倍点”,且
,求n的值;
(3)若点D是线段
的“2倍点”,则点D表示的数为 ;
(4)若点E在数轴上表示的数为t,点F表示的数为
,要使线段
上始终存在线段
的“3倍点”,求t的取值范围(用不等号表示)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/836f2d2e6b78de8d5c3b82614cd85bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a735e3c4f2b1b530b4c81ad1babbbb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/751be5de-6615-4b52-acb7-0810bd0d9d78.png?resizew=460)
请根据上述规定回答下列问题:
已知图2中,点A表示的数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81fb134b2b48acc99213fff6ccfee65f.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8f84f5de5d5fe7a643ddfb4ee243eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若点C为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a089c207e39a24d0d82aa853ac2bbb8c.png)
(3)若点D是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(4)若点E在数轴上表示的数为t,点F表示的数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde47d197b05343b64bc5a94fd28254c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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