1 . 对于有理数
,定义一种新运算“*”,规定
.
(1)计算
的值;
(2)已知
且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4053bf6364cc0235f1af6cfc768f147f.png)
(1)计算
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d9f7f50cc80e49882b9f3e74d954e0.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2159355c125b7f61294b040de9ebc948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2 . 解方程:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3d9d8afb1aa2129d909bee1111a77e.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c3d9d8afb1aa2129d909bee1111a77e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9432ce006bceb73a30887f07c50dee2f.png)
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3 . 按下面的程序计算:若输入
,输出结果是101;若开始输入的
值为正整数,最后输出的结果为181,则开始输入的
值可以是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fafbc94594b8c877de8883dea10e374c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/72a5be6d-d712-449b-a032-20825df157ee.png?resizew=458)
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2024-02-18更新
|
68次组卷
|
3卷引用:浙江省宁波市象山县2023-2024学年七年级上学期期末数学试题
4 . 解方程
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073801435cf99dc60696cb4d536fb491.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7124ad214228277b44c5d4be68cf574e.png)
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5 . 解方程:
(1)
.
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c58111f4e171286487ec65c97a76caff.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d77f97b8b6f2e9a8173da3663aeb4a60.png)
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6 . 根据下表中的数据,求得a的值为______ .
代数式结果 | 2 | |
7 | 4 | |
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7 . 已知
是一元一次方程
的解,则
的值为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d51c549764ae3ed4133a5a57a320909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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8 . 如果p,q是非零实数,关于x的方程
始终存在四个不同的实数解,则
的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cae4354af38eb9f42d18ed7767e3100d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20270a8fb15833ef5c7ba15d7b148f8f.png)
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9 . 对于任意实数a、b定义一种新运算“△”如下:
,例如
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea6dfa03ac3faa92c7d9e285fa51061.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ed73bb91743a001ab879a3970cb1170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6750fce9bb9cdb1897a09f83dd1b4ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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10 . 方程
移项后正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/298f404e32b4e1462b84bac42e16995f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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