1 . 已知函数
.
(1)若
,求实数
的取值范围;
(2)设
的极大值为
,极小值为
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89ae9c590045b246110a80573c361ff3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c8a0f86edc5e8136f988bbebb4c5334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57584805a70c17d752bbd0def995accc.png)
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2019-04-29更新
|
1100次组卷
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5卷引用:【校级联考】河北省示范性高中2019届高三下学期4月联考数学(文)试题
2010·上海·二模
名校
2 . 已知二次函数
的图像为开口向下的抛物线,且对任意
都有
.若向量
,
,则满足不等式
的
的取值范围为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4166972dec0aa3e8694a44eeb941a08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87e04b4cd16224102ef696222caa56ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae81964a5d8df0502d6eaea575b11367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c461c17d03c12c75d64bcd7216e02c65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/818155ef0386b3b18259bf458fd5a7bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次