1 . 设a、b、c、p为实数,若同时满足不等式
、
与
的全体实数x所组成的集合等于
.则关于结论:①a、b、c至少有一个为0;②
.下列判断中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5f28031b036e4a37be931d5ff28368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e2f84c4c975416035f8cad81c16c7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745f264b3306dc539570ba4fd9748007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/913adf326c389a213d6cfebc4f2258e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59d9880afb9e2262dbfcf20235e85a62.png)
A.①和②都正确 | B.①和②都错误 |
C.①正确,②错误 | D.①错误,②正确 |
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A.①和②都正确 | B.①和②都错误 |
C.①正确,②错误 | D.①错误,②正确 |