1 . 若
,则代数式
的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ccf1328602bd22b09ca55faa023a3d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fa3e1c5fa8bab9dc3796ce90564e6d.png)
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2 . 先化简,再求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc91a998556366f2e1614f857548acf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eafc33df9d0030b15b5cb55c864a3c68.png)
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3 . (1)计算:
.
(2)化简:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2328fa922d2a16cf93fc4484395b9cb4.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f41489b6ea87c251bd817ec11328cfb.png)
您最近一年使用:0次
名校
4 . 计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c7d804b9cdeacdfea05e1febb74f06d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62e168e9862d3dcc68b7079d3dbaa9f.png)
您最近一年使用:0次
2024九年级下·云南·专题练习
5 . 先化简,再求值:
,其中
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679a49dbcf0dc09cfcac01dda4c2be5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86304c3e26200299a0480641525a283.png)
您最近一年使用:0次
6 . 已知
,求代数式
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecda6051ffac6d2b34273cfe6e3bca26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ceb56319f079eb6bb6e70de2559d6d24.png)
您最近一年使用:0次
7 . 已知
,
,
,且
的值与
无关,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d73eec428a638432068ec60215cd78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a541fff458a094069abef852f8987f89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf3f6d6aaed51ac3469d32c38ad1717.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27f366291b4ffd9daa4fe971cdc4753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
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8 . (1)计算:
;
(2)化简:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19b622227bcd1ebcee9e86813fdce4ea.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dfce345d076ae06333863134ca12a75.png)
您最近一年使用:0次
9 . 已知
,
,
,若
的值与x的取值无关,则a的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf1052f0c0120a3edcc4f92a86b7bb15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722ffeb30644af7d623c244727d4e831.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/531974e4c59b661c1fdfbf2011a0a3d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27f366291b4ffd9daa4fe971cdc4753.png)
A.![]() | B.3 | C.5 | D.4 |
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10 . 先化简,再求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fb10f496c470d252d4393403e5ab9e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e9222ffc26c0e6bfbf252ab5d8a520.png)
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