定义:若分式A与分式
的差等于它们的积.即
,则称分式
是分式A的“可存异分式”.如
与
.因为
,
.所以
是
的“可存异分式”.
(1)填空:分式
________分式
的“可存异分式”(填“是”或“不是”;)
(2)分式
的“可存异分式”是________;
(3)已知分式
是分式A的“可存异分式”.
①求分式A的表达式;
②若整数
使得分式A的值是正整数,直接写出分式A的值;
(4)若关于
的分式
是关于
的分式
的“可存异分式”,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd6dc7b68aa156eb17f4e0bc2857892e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1efd69e4c46be70974d2acf5158bc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85f36ef9b372973e24b894b7f0f897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d2c1cad1fb59a69adbaf9009861f45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7d6a61970c2b90f216081c21b3e5d1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85f36ef9b372973e24b894b7f0f897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1efd69e4c46be70974d2acf5158bc11.png)
(1)填空:分式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85f36ef9b372973e24b894b7f0f897b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/512ba3aa568f6f3c1b4068f2dfe3bf68.png)
(2)分式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17cc6ae4584b12a31dd2cbc4aea2fef9.png)
(3)已知分式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e7d15801db5ebc1a818aac00629f10.png)
①求分式A的表达式;
②若整数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(4)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbfbdb8b92667b63b64031d6b542a9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dbf2b5dce71e82c41625d0f2febcca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf0fc858c05c411b749a4325ea469dad.png)
23-24八年级上·湖南长沙·阶段练习 查看更多[2]
湖南省长沙市周南实验中学2023-2024学年八年级上学期第三次月考数学试题(已下线)考题猜想10-1 分式 (与分式运算有关的10种常考题型)-2023-2024学年八年级数学下学期期末考点大串讲(苏科版)
更新时间:2023-12-26 09:57:44
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解答题-问答题
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较难
(0.4)
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【推荐1】如果两个分式M与N的和为常数k,且k正整数,则称M与N互为“和整分式”,常数k称为“和整值”.如分式
,
,
,则M与N互为“和整分式”,“和整值”
.
(1)已知分式
,
,判断A与B是否互为“和整分式”,若不是,请说明理由;若是,请求出“和整值”k;
(2)已知分式
,
,C与D互为“和整分式”,且“和整值”
,若x为正整数,分式D的值为正整数t.
①求G所代表的代数式;
②求x的值;
(3)在(2)的条件下,已知分式
,
,且
,若该关于x的方程无解,求实数m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45298124600a42a8917eae359a49360.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0df1c17f64096c28122c5dae031f399.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d1ef8e071206c9d45b869e0138ce528.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
(1)已知分式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21a3b57fd127f86635420c2caed9c2de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ed5b6a50ecfeb79f17aef40ddc7ec0b.png)
(2)已知分式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e277b0ec845f55c4466bbc2d569961be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/483190ffda1c70d4ebc901c97f9b28f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367e788c32187ae2cc97aaa24da1d40d.png)
①求G所代表的代数式;
②求x的值;
(3)在(2)的条件下,已知分式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fefc6072f843a6cf7ea812a979ad2136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46982183f7350e62861b9baf934d05e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffca4b723091856d2eb2d78a4f55f6de.png)
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解答题-计算题
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【推荐2】已知下面一列等式:
;
;
;
;…
(1)请你按这些等式左边的结构特征写出它的一般性等式:
(2)验证一下你写出的等式是否成立;
(3)利用等式计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aaee22a81b9b7c4362b6456e8fc0596.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5637c341156cbfddfa28f6071eda1f1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef3e1547304ec9f760b458770a7e932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84273e3571bccfb58693c8200e4810f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96283c8090e38e58cdede3979ac2e48c.png)
(1)请你按这些等式左边的结构特征写出它的一般性等式:
(2)验证一下你写出的等式是否成立;
(3)利用等式计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aaee22a81b9b7c4362b6456e8fc0596.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eebb1c90a6f08775357ee67363679ab5.png)
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