下列四个结论中:
①若
与
是同类项,则
:
②若关于x的多项式
的运算结果中不含
项,则常数项为
:
③若
,则
:
④若
,
,则
的结果只有一种.
其中正确的是______ (填序号)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b13be1f3cd19a79bd6d4c010d2efb36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/345da3d7270784d3963fdd74260715e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0a4480988244a9d04ec293975db2cc0.png)
②若关于x的多项式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2867fd73b582453c09f1a5fae2707239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
③若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf2aa87a167349cfc1a4f980d4417477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dcdb0ac49b8d80cea8e7c81cf3a3034.png)
④若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e56f4504e0f80fd031c8b5f41832e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72e96f2368d04db6d0e05de46e97e29f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eccc59db45447564f69d0b1ab3e0fd20.png)
其中正确的是
更新时间:2024-01-26 23:11:31
|
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适中
(0.65)
【推荐2】已知
,
,
在数轴上的位置如图所示,化简
的结果是 ___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/550f606a0e6ec02369b328f36e8c4f11.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/c4975731-e325-4abc-9f96-ac956337a487.png?resizew=239)
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