1 . 判断正误(正确的写正确错误的写错误)
(1)不等式
表示一个一元二次不等式.( )
(2)不论实数
取什么值,不等式
的解集一定与相应方程
的解有关.( )
(3)设二次方程
的两解为
,则一元二次不等式
的解集不可能为
.( )
(4)不等式
或
的解集为空集,则函数
无零点.( )
(1)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d2d3c75ecc19143fa59f19017df0a2.png)
(2)不论实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f95f3fa710253c107b6e8fb458108b0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
(3)设二次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13fa32c1e926f40a0722d106563777ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5f28031b036e4a37be931d5ff28368.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2227e27e8d34198f022bf7024503cb0a.png)
(4)不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59ec172dcc47a1f186036dea10a7005a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/056dc6c9807927e8353c197c868b288a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a90385c676848de67293e3ed6bc000fe.png)
您最近一年使用:0次
2 . 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)
您最近一年使用:0次
3 . 判断(正确的打“√”,错误的打“×”)
(1)
是一元二次不等式.( )
(2)若
,则一元二次不等式
无解.( )
(3)
为一元二次不等式.( )
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111a44c549b2381f1603bfad76eb1365.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f585b046b10267a4bcf295a76473a4dc.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb35914fad2a4287d245599dd987e179.png)
您最近一年使用:0次