已知
,
.
(1)分别求
与
的值;
(2)求代数式
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/146af05012e5d75e60bd9f4819ec6fb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced281a90cf61c7de01726b9084291f9.png)
(1)分别求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c925be255ca736a53b24d13ddede1a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/118933cede78675413dbafac24ee008c.png)
(2)求代数式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5216425828d500f67fbe68cb4f3d1e63.png)
22-23七年级下·江苏·单元测试 查看更多[6]
(已下线)9.7 整式乘法与因式分解综合练习(基础)-【帮课堂】2022-2023学年七年级数学下册同步精品讲义(苏科版)四川省眉山市青神县2022-2023学年八年级上学期期末数学试题(已下线)核心考点04乘法公式-【满分全攻略】2022-2023学年七年级数学下学期核心考点+重难点讲练与测试(苏科版)广东省揭阳市榕城区2022-2023学年七年级下学期期中数学试题广东省揭阳市揭西县棉湖镇2022-2023学年七年级下学期期中质量监测数学试卷广东省揭阳市惠来县明德学校2022-2023学年七年级下学期期中数学试题
更新时间:2023-03-11 23:43:21
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解答题-问答题
|
适中
(0.65)
【推荐1】综合与探究
我们把形如
(
,
不为零),且两个解分别为
,
的方程称为“十字分式方程”.
例如:
为“十字分式方程”,可化为
,∴
,
.
再如:
为“十字分式方程”,可化为
,∴
,
.
应用上面的结论,解答下列问题:
(1)若
为“十字分式方程”,则
______,
______.
(2)若十字分式方程,
的两个解分别为
,
,求
的值.
(3)若关于
的“十字分式方程”
的两个解分别为
(
,且
),求
的值.
我们把形如
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db60ab8654c57264e4b704f557e7fa0.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/e1c4cdcb32e3a0ce527c13978c022a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f4c2615b5047075cb8f66726e7f948.png)
例如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d93ce7254956101e7fa800167a39bf3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed595ec468fb290d0b32edd478fcd6e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a60302649eb940748da818199e55da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50e4fd085ee10f340a008389c4a1a80d.png)
再如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7eae0b87684c4136f89beb251dad5654.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca698b4ecba2a0bf920f72ceee9b288d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de10eb4cf291d00db3bb92596143afa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a52b74ade6b5434aee52b6e56bc694.png)
应用上面的结论,解答下列问题:
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/201965442ba2cf3a79fd5579d74424be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e92f14fb20f920f88dcad2ccd1d53f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15dad5a12f34bed0da0de93beae0eaa4.png)
(2)若十字分式方程,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b384eea467243c4f4df55bbd377236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bb39135ed8802263d9846d54a71f4d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b21b78d4ce2b476afd4f1957cf656d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d19f98faf2f4b730c5c838e44b0331.png)
(3)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6eb4e810ff1686154b2e4dd3b83e568.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2210f152080d9a68a97c805f5c1cde96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e809246e44d354c4d016f265604cff8a.png)
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