题型:单选题
难度:0.85
引用次数:148
题号:10550056
下列运算正确的是( )
A.a10÷a2=a5 | B.a2+a2=a4 | C.(a+b)2=a2+b2 | D.(a2)3=a6 |
更新时间:2020-06-27 08:33:01
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【推荐2】以下式子中正确的是( )
①若
,
,
,代数式
的值为0
②若
,则满足条件
的值有3个;
③若
,则用含
的代数式表示
;
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee19cd51fff98afdbccbbb4d28b4590a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff1df30ce5fb9cdb89b1a37847f0385.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552fe52e6f81753f0a639db8fe91854e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/629abc79d5be8093ee40ef9f6eb19337.png)
②若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75822322536a1efb39f5d68163d44e0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b37ec9e83f4f36523161621f527d056.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8843ece347f3a51c1ee0c52ec6948338.png)
A.①②③ | B.①② | C.①③ | D.②③ |
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