1 . 已知关于
的方程
是一元一次方程.
(1)求
的值;
(2)若此方程的解与方程
的解互为倒数,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/831d342e88d30a2dbd627119fbc200f9.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若此方程的解与方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100ca6f416834f6d6dbe86f4e48904a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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2 . 求未知数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1343fa77809eaa71a93e045d1612768.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1343fa77809eaa71a93e045d1612768.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e04de5adf71ee33028beb8d60939f58c.png)
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3 . 对于任意实数a,b,定义关于“
”的一种运算如下:
.例如:
,
.
(1)若
,求x的值;
(2)若
,求x的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea7e8b342faaee891b043eea8abf366.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5578b7ad6e673ec8166fc4f39a61631a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d60f5bfbe883885b1ec37908909a3cb.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a23d08e648e6474cc8a386520295582.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84db365b099f6210c8d6e726bf645837.png)
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4 . 已知一个正数m的两个平方根是
和
,求m的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c7f468c1edd8644b6b92b110db617c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c004611b99819f3ef60e557b280a9f16.png)
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名校
5 . 解方程
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a500f67ba92473d10802342a84938ae1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb32c925ac843a24f109d016401498f1.png)
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2024七年级下·全国·专题练习
6 . 已知,一个正数的两个平方根分别为
和
.
(1)求
和这个正数;
(2)求
的算术平方根.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7610524671d0a762d423b20d7e0ce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdd749fe1cc2797b017c7fafad9ab356.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4766d4417fff00297b20ca0ef827861.png)
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7 . 已知
与
互为相反数,则求x的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56d6a3f877ef7c4acfd314445f6bf79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a5eee509274c37d10112f07d16a764f.png)
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8 . 解下列方程:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e02524e6bd527a65842d65018e93b64.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0416e353f1aa28590c7cc4f953c86c4f.png)
(3)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea05782a1ea956fc30a63a3f5c3716.png)
(4)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e02524e6bd527a65842d65018e93b64.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0416e353f1aa28590c7cc4f953c86c4f.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea05782a1ea956fc30a63a3f5c3716.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1a734e7fb1ddf064159c64aa141407.png)
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名校
9 . 已知
如
.若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d43f4d7cfa74c34fd93d18d3fcf5bee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/447555bb456e28fe24130fbe046b4854.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6af062b0ef4c2df4dedb1279fe6c421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2024-04-18更新
|
96次组卷
|
2卷引用:湖南省衡阳市第三中学2022-2023学年七年级下学期期中数学试题
10 . 请根据李老师所给的内容,完成下列各小题:
(1)如果
,求y的值;
(2)若
,求x,y的值.
我们定义一个关于非零常数a,b的新运算,规定:![]() 例如: ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2084313332c6b94d8bbb99e6a31639e5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebfebb35eb380733361966428ade6eff.png)
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