已知|ab-2|与|b-1|互为相反数, 求式子
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f29fe1dc34ae9240a09493451a7f6bd.png)
更新时间:2021-12-27 13:20:13
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【推荐1】(1)已知
,
.若
,求
的值;
(2)已知
,
互为相反数,
,
互为倒数,
的绝对值为2,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de975b3bc6d5601767f52ae40ab44ad2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9af93810247c71f446457bc3594c28.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a5abe56c019ac914e1fcde1865a747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
(2)已知
![](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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de6fb50fe6882f5c5a17f09492cb549.png)
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适中
(0.65)
【推荐2】已知实数
与
互为相反数,y的算术平方根是14,z的绝对值为
,且m和n互为倒数,求
的平方根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4aa4746bbcfcc18046c4b9bcaa35ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8265d2e688c93479aa316bfbcdf43713.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01339b9aa8bf01130a4c693897d69031.png)
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适中
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【推荐1】如图,A、B两点在数轴上对应的数分别为a,b,且点A在点B的左边,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/b6a90c82-4d08-4c62-bfde-e06dfa1710e6.png?resizew=321)
(1)求出a、b的值;
(2)现有一只电子蚂蚁P从点A出发,以3个单位长度/秒的速度向右运动,同时另一只电子蚂蚁Q从点B出发,以2个单位长度/秒的速度向左运动,设两只电子蚂蚁在数轴上的点C相遇,求出点C对应的数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/252b0fffa516924c3a6b08d127ce08fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6c0561cf4941518e1d6527b7f2f1b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ed37ee7432002cd0e0978b2012e184.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/4/b6a90c82-4d08-4c62-bfde-e06dfa1710e6.png?resizew=321)
(1)求出a、b的值;
(2)现有一只电子蚂蚁P从点A出发,以3个单位长度/秒的速度向右运动,同时另一只电子蚂蚁Q从点B出发,以2个单位长度/秒的速度向左运动,设两只电子蚂蚁在数轴上的点C相遇,求出点C对应的数.
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适中
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【推荐2】如图,在数轴上的
点表示数
,
点表示数
,
满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/4601eacb-cc05-48ac-9392-544304fe0103.png?resizew=225)
(1)分别求出点
表示的数
和点
表示的数
;
(2)在数轴上有一动点
,且点
满足点
到点
的距离是点
到点
的距离的2倍,请求出
所对应的有理数;
(3)若动点
从点
出发第一次向左运动1个单位长度,然后在新的位置第二次运动,向右运动2个单位长度,在此位置第三次运动,向左运动3个单位长度…按照如此规律不断地左右运动,直到满足第(2)的条件,请直接写出这是第几次运动.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e27d6218e207ac8bacbd3cafda9b1449.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/11/4601eacb-cc05-48ac-9392-544304fe0103.png?resizew=225)
(1)分别求出点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)在数轴上有一动点
![](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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/dad2a36927223bd70f426ba06aea4b45.png)
(3)若动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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解答题-问答题
|
适中
(0.65)
【推荐1】如图所示,是由若干棱长相同的小正方体叠成的几何体.第1个几何体由1个小正方体叠成,第2个几何体由4个小正方体叠成,第3个几何体由10个小正方体叠成,……
请你解决以下问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/43db0117-d237-4d9f-b1cb-e6709ae604e2.png?resizew=323)
(1)按此规律,第4个几何体由________个正方体叠成;
(2)为了方便表述,我们记第
个几何体由
个小正方体叠成(其中
),则
________;
________;
________;
(3)求值:
.
请你解决以下问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/28/43db0117-d237-4d9f-b1cb-e6709ae604e2.png?resizew=323)
(1)按此规律,第4个几何体由________个正方体叠成;
(2)为了方便表述,我们记第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bce6187f3f11e0ceead8a645f5f9d32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85a8de81421b702ef1a949b0157f0daf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d5d99b27490d80563287f470de6f6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc610a98c4f311845617d26982f6515.png)
(3)求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5c7c6b6b7b5394fc8e689d0809cd568.png)
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解答题-计算题
|
适中
(0.65)
【推荐2】(1)先化简,再求值:
,其中
,
;
(2)定义一种新运算“
”,其规则为
.例如
,
.
①计算
值为_____________;
②有理数的加法和乘法运算都满足交换律,即
,
,那么“
”运算是否满足交换律?若满足,请说明理由;若不满足,请举例说明.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5dec73dad460f2930f75801f131c670.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eefa44964db83759aff6fc8dd7ef8f28.png)
(2)定义一种新运算“
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7477c2b32e6d47dcd372102703a044c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d449dcac158d71519cbca2b9713ac6d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de75224523a2cfdf0a451a9622832675.png)
①计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f41499f005bfc6013b5949768feb05c.png)
②有理数的加法和乘法运算都满足交换律,即
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c66ebcce45b0de24a80f1892d5fc3b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2ca1e93f07daa6498b39beb12d2aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
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解答题-问答题
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适中
(0.65)
【推荐1】已知正数a的两个不同平方根分别是2x﹣2和6﹣3x,a﹣4b的算术平方根是4.
(1)求这个正数a以及b的值;
(2)求b2+3a﹣8的立方根.
(1)求这个正数a以及b的值;
(2)求b2+3a﹣8的立方根.
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