1 . 解答下列各题.
(1)计算:
.
(2)计算:
.
(3)分解因式:
.
(4)分解因式:
.
(5)分解因式:
.
(6)分解因式:
.
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911e1956af31fd73dde0fe85a4e65af1.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364e87356aac28bdeeabe2b02daa869b.png)
(3)分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84a200e9b09415edf08bb0d1e304926d.png)
(4)分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd5b913c430b795c0c9258ce66056f56.png)
(5)分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6749b27d7372499b94f6b8bf63a12868.png)
(6)分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52e9526fcd04c46277c2a5e63cebd30.png)
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2 . 计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a822e31aedf0fab4bb2458e6200c92.png)
(2)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207b3cfad3dca71339ed85160a0cb23e.png)
(3)先化简,再求值:
,其中
,
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a822e31aedf0fab4bb2458e6200c92.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207b3cfad3dca71339ed85160a0cb23e.png)
(3)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc890833a00b0ab09ea3baebc7a8cfed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b650820d7bed48ed67a2869ad8c65ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd24f3c4bc9f9a75d4b28630bb630d2b.png)
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2022-03-05更新
|
445次组卷
|
2卷引用:海南省海南华侨中学2021-2022学年八年级上学期期末数学试题
3 . 解答下列各题:
(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b0b5328eaafbbd0012e714c0cf1b95.png)
(2)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71c9348eaae008f7beb03a6004e8a06.png)
(3)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09e5615b83d90a6f95b506f25f4db85.png)
(4)分解因式:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e7520e601047b95501782179a0e38c.png)
(5)解分式方程:
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85b0b5328eaafbbd0012e714c0cf1b95.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71c9348eaae008f7beb03a6004e8a06.png)
(3)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09e5615b83d90a6f95b506f25f4db85.png)
(4)分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92e7520e601047b95501782179a0e38c.png)
(5)解分式方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de1309f9623824c0e1c2fe4a3d7c9e96.png)
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4 . 完成下列各题:
(1)计算:①
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4401b43e2a11710eb5467cc8294e0f09.png)
(2)因式分解:①
②
(1)计算:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6efb84cba75adc0c9d3cc6627b2ef15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4401b43e2a11710eb5467cc8294e0f09.png)
(2)因式分解:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89467e0a1ecd3d7e1a97a857b08123a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4f47546070eb133ee73201c4e8e2c53.png)
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5 . 计算:(1)
.
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a58476770d6a3fa1df5786be200f376.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc87d53064d4c436a1be247c8a278173.png)
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6 . 计算.
(1)4×(2n)2÷(2n﹣1)2.
(2)(﹣1)2020×(π﹣2)0﹣|﹣5|﹣(﹣
)﹣3.
(1)4×(2n)2÷(2n﹣1)2.
(2)(﹣1)2020×(π﹣2)0﹣|﹣5|﹣(﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
您最近一年使用:0次
7 . (1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754a2aeee4a13cdfaccd4660fa3ccbdb.png)
(2)先化简,再求值:
,其中
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754a2aeee4a13cdfaccd4660fa3ccbdb.png)
(2)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953ded2fff500cd870d5856806147f59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b86304c3e26200299a0480641525a283.png)
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8 . (1)计算:①![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2b55a1dfdafff4b7478127f7a51f63.png)
②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d53d686a472a85b55c2aa7c56049dd7.png)
(2)分解因式:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15cf3d42357d163b62ec6528ecab907f.png)
(3)先化简,再求值:
,其中
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d2b55a1dfdafff4b7478127f7a51f63.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d53d686a472a85b55c2aa7c56049dd7.png)
(2)分解因式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15cf3d42357d163b62ec6528ecab907f.png)
(3)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdf32236bf34da26c290a62b913d9ca8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dd82b5223c2a708c1729db2a3750990.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ce4430b8b9b0c78de693513a7f88915.png)
您最近一年使用:0次
9 . 对于两个非零实数a,b定义一种新运算,记作
.
定义:如果
,那么
(
,
,x为整数).
例如:因为
,所以
;因为
,所以
.
根据上述运算的定义,回答下列问题:
(1)计算:
___________,
___________;
(2)如果
,那么
___________;
(3)如果
,
,那么
___________;
(4)如果
,
,那么
___________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26758834c62404f580be4469135a8c58.png)
定义:如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc3f88645f26f93873ec74f298e4b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ac63463ab471446864aa6f1ff7ed977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03b011f69dfc5262a3d82f64676739b.png)
例如:因为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aafcb548ac5324e43dc9b20b01cdc45e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c97c81e9e52342c34ad19335a02012c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2175187b0c2e8e865438e4a93bb068c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c86ba4034a6edf0d4ccf5349632b32f4.png)
根据上述运算的定义,回答下列问题:
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d8010a6855533bb7c461ee09d72b10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f365a5cda7892a2ae6b66650c336427.png)
(2)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bb0ac64c646594ced2bfde78e66413a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
(3)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26d62aee3fc505e5e725fe1a43878eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/062fbc3ab17124d02aa3b51296b46fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c0e5d467f32b84f97273fa18f7db7e.png)
(4)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa6f831315a34703f535c17e93b6bcc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ef7fe5589e9278cd225cc2e03c02685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b02f30cadb86b04a60f3c783c4883b.png)
您最近一年使用:0次
10 . 计算:(1)a4÷a5•(3a3)2;
(2)20212﹣20192(利用因式分解计算).
(2)20212﹣20192(利用因式分解计算).
您最近一年使用:0次