1 . 解下列方程或不等式
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86eb7ae7fe5083cf60fb73b7a82ef37.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3a518175baf49e1550bf6792bacebe.png)
(3)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86eb7ae7fe5083cf60fb73b7a82ef37.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3a518175baf49e1550bf6792bacebe.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25ad4a65d1fb47854af0743caa2ecac4.png)
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2 . 下列解方程的步骤正确的是( )
A.由![]() ![]() |
B.由![]() ![]() |
C.由![]() ![]() |
D.由![]() ![]() |
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24-25七年级上·全国·假期作业
3 .
是下面方程( )的解.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
A.![]() | B.![]() | C.![]() |
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24-25七年级上·全国·假期作业
4 . 解方程:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5524eb7a93959d9464a2fc2e98198335.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce222d958a5d35cb0152337b0bd15d4f.png)
(3)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5524eb7a93959d9464a2fc2e98198335.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce222d958a5d35cb0152337b0bd15d4f.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73fcefad2b3f40d5167d1cd46180d5f9.png)
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24-25七年级上·全国·假期作业
5 . 若
是方程
的解,则a的值为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/604db798ec902958d595bed01c6e336d.png)
A.4 | B.7 | C.10 |
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24-25七年级上·全国·假期作业
6 . 解方程.
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f391a52bee65bb821d1db844bcbead53.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761b2e5ff36a5c7513e8d7efff31592d.png)
(3)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f391a52bee65bb821d1db844bcbead53.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/761b2e5ff36a5c7513e8d7efff31592d.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/780b70a48853298027b3de64e557d12f.png)
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名校
7 . (1)解方程:
.
(2)解方程组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7edd55bf305e1f696ac05301485fe9eb.png)
(2)解方程组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bd2e79e1ec14859ef2f1c16e9b9ef50.png)
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8 . 若
是4的平方根,则
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95e26ea0261f2b67983b07b8d0bb8bf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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9 . 对于任意实数
,
,定义关于“
”的一种运算如下:
.例如:
,
.
(1)若
,求
的值;
(2)若
,求
的取值范围.
![](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/55d8782081982e991edc3499a1ad4278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c050fb52aa9913e9e92c72eefd16b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1debecd4fb605de69a66e8d41c85e26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f774e93898cea0bbdf44d7725411da5e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a3617238a0db6f9850b1ba622c24bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e84d653cad8f475f1532cd682865bebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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名校
10 . 若
是二元一次方程,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/812b77100a8d8d319d6ea4cb98f0d591.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
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