已知a,b,c为有理数,并且a+b+c=0且
,求
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16de2d7f06346a0fc6b5d6822e746237.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d414c2601327149d2a57566a89cd55a.png)
A.-1 | B.1,-1或-3 | C.-1或3 | D.1,-1,3或-3 |
更新时间:2020-01-11 22:16:33
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相似题推荐
单选题
|
适中
(0.65)
【推荐1】已知
,
,且
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f90d93e14a49bd32c9d15a496acde8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89f90a4a106bfb3c73bae048f5b83657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1eb9e181572101d33f40b4777943d38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6524a42af893ca35c6b92c4e82d0058.png)
A.7 | B.3 | C.―3或-7 | D.3或7 |
您最近一年使用:0次
单选题
|
适中
(0.65)
【推荐2】下列结论:①若
为有理数,则
;②若
,则
;③若
,则
;④若
,则
则其中正确的结论的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f3371d385140136345c0e7b17699d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fb20e291772c2614ad19f4cc919dfec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9cdea1e995c59e5d3225acad8b4d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9cdea1e995c59e5d3225acad8b4d3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4606b490519d8c36c996b6ef6af05da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73c21bd0bd90a89b7ff5ac0eacf612a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e59da1f0d1a8c2868fe330b7df2224b7.png)
A.3个 | B.2个 | C.1个. | D.0个 |
您最近一年使用:0次