1 . 已知2是关于x的方程
的解,则a的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9d57c9e71a2684f71652ab1c44cf06d.png)
A.![]() | B.![]() | C.5 | D.![]() |
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2 . 解方程:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29d1a6fb2fcebefc53e1aee323f4f383.png)
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3 . 若
是方程
的一个解,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e5ea5e5273b02c56195485e1fb9588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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名校
4 . 解方程:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/100d486c656aaeca0268db58e08e7dc7.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b2ad4068338901d13df97d49d0fa53.png)
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2024-01-25更新
|
171次组卷
|
2卷引用:湖南省长沙市2023-2024学年七年级上学期期末数学试题
5 . 方程
的解为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1cfcb40eb9c5cee35f0e65168c399a6.png)
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6 . 解方程
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4db32d3fa953f92d7d25a4ec1194aa.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f523650a582351691312b513678240dd.png)
(3)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f4db32d3fa953f92d7d25a4ec1194aa.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f523650a582351691312b513678240dd.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425ec6ab28af65112ee671ee49e31d62.png)
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7 . 方程
的解的是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd964ee4776b9d0d79d6f94a53088c49.png)
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8 . 解方程.
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6458aa814a7759143a95e3f19ce9d1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef21734f27b3ffa46f605fa736f04dcc.png)
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9 . 【定义】若关于
的一元一次方程
的解满足
,则称该方程为“友好方程”,例如:方程
的解为
,而
,则方程
为“友好方程”.
【运用】
(1)
,
,
三个方程中,为“友好方程”的是 (填写序号);
(2)若关于
的一元一次方程
是“友好方程”,求
的值;
(3)若关于
的一元一次方程
是“友好方程”,且它的解为
,求
、
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40cb7125a7b832153bb37fb614a73e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/124ac080c9ee07aee20803c3f75536f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8068f1472e337aa6016c5d3a07ce60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9590113eb7ccd98dddbb2544b44ed6c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a8068f1472e337aa6016c5d3a07ce60.png)
【运用】
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb1243509aa35e5ab5e7d2cd8a1f4e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1887f641a539e9d53da203c7df0aa96.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54eda537970d3eafdd05dd58fec80e75.png)
(2)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae136acef22c213f313870dced529a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(3)若关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7ea801932effb51aafdd5058bfe0611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1be7302f2e9ff02fee3fcf26e77b1c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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10 . 解下列方程∶
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83c30091f8b1906cc8f52c9c118ed8e.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83c30091f8b1906cc8f52c9c118ed8e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60d33edd1f92bd091b3c3d4790b8cfb8.png)
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