定义运算
,下面给出了关于这种运算的四个结论:①
;②
;③若
,则
;④若
,则
或
.其中正确结论的序号是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a2083ef56cc4c4168e68fcbb3eafd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbd98fc46d231f0e6f3202c23bea47f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac7ff4ffa27279dbf509cfb852446813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5be97cd1c7111b654d87d8fbb63b6a84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c17a9870ca1913466611760ec714ed1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02eaa1f1e1b733f8c3ca76c9bee7971a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
A.②④ | B.②③ | C.①④ | D.①③ |
更新时间:2021-04-29 17:54:49
|
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【推荐1】对于实数a、b,定义
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A.1 | B.2 | C.3 | D.4 |
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单选题
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适中
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【推荐2】定义运算:
,当
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b05a498a4b5d234c9da6af6758f4ad53.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】下列各式的变形中,正确的是( )
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C.x2-4x+3=(x-2)2+1 | D.x÷(x2+x)=![]() |
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