1 . 判断正误(正确的填“正确”,错误的填“错误”)
(1)
是一元二次不等式.( )
(2)若方程
没有实数根,则不等式
的解集为
.( )
(3)设二次方程
的两实数根为
,则一元二次不等式
的解集不可能为
.( )
(4)
的解集可能是
.( )
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8eb9e90617834d53b7755e518ce2eb.png)
(2)若方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24527361966ba6ded458eed6bcee59df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42c345443ea8da6d1b73b4035e2566d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf3ed15aa3dcc4211fb520b5b942c989.png)
(3)设二次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7380b4cd6434b4b458d711826e49d23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42c345443ea8da6d1b73b4035e2566d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2227e27e8d34198f022bf7024503cb0a.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42c345443ea8da6d1b73b4035e2566d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574bdac28b1dcbf03f0fb903e8d0b49a.png)
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2 . (1)若
与
都是单位向量,则
.( )
(2)平面内的任意两个向量都可以作为一组基底.( )
(3)平行向量的方向一定相同.( )
(4)若
,则
或
.( )
(5)若
的面积
,则
或
.( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/778542d99ab19e2ecc0c7ef75161f133.png)
(2)平面内的任意两个向量都可以作为一组基底.
(3)平行向量的方向一定相同.
(4)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2cc1f1ef9ad32eef62aefa4c3fc3d6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d065bd10f7ea1f05764e28f095f244f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aed3d85ea66827c00b5f7e4c5ae598a.png)
(5)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a72d02ca51ae5759ee8e5ca23d3ff0e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a6794a460487525552efedd7edc4df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4c5016bd1fc6582078299b9cf8b392.png)
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