1 . 已知二次函数
.
(1)该函数图象上有两个点
,当
时,y随x的增大而增大,对任意的
,都有
恒成立,求a的取值范围.
(2)已知
,若抛物线与线段AB只有一个交点,求a的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1911154b19d51f938410908dc2b3eb12.png)
(1)该函数图象上有两个点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35115e581c859d8fd22653883ebd35ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b27f27cbb8185c1974d715ff95f8801c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ae082c6866016aeac6b235da55a7611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2e57263b90585f718115ce7610d5790.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f8b751f0a6dc46675b9df1ccc5f32b.png)
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2 . 已知函数
,
,则不等式
的解集为______ ;若不等式
对任意的
恒成立,则实数
的取值范围为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f97f84320e2fc890f7fd09ef1edd952d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/598b919076bd7baf35a5223aa7f18fe8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a9f7884d2a1a1f304d8d468d8dd47c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98c928e85e40941dbd0db52c2e661edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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