解题方法
1 . 已知函数
.
(1)判断并证明函数
在
上的单调性;
(2)若存在
,
,使得函数
在区间
上的值域为
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c73d72fedaf279a60c0602ab991e57fc.png)
(1)判断并证明函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5d6243e93c41978871cb23d8e66148d.png)
(2)若存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4416fb953126a852fffbfb614025de87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d31e72421c0d65e00edb2acce12abffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/155f15aaf6f7846ebf5d5dd03e088838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
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2 . 如图,在平面直角坐标系xOy中,抛物线
与两坐标轴分别相交于A,B,C三点.
![](https://img.xkw.com/dksih/QBM/2021/9/9/2804503869956096/2806312468815872/STEM/860e5e4a-6855-41c3-bc90-ba6519c7a045.png?resizew=272)
(1)求证:∠ACB=90°;
(2)点D是第一象限内该抛物线上的动点,过点D作x轴的垂线交BC于点E,交x轴于点F.
①求DE+BF的最大值;
②点G是AC的中点,若以点C,D,E为顶点的三角形与△AOG相似,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31fb55fe9a895607f89b2c0e0b8dedaa.png)
![](https://img.xkw.com/dksih/QBM/2021/9/9/2804503869956096/2806312468815872/STEM/860e5e4a-6855-41c3-bc90-ba6519c7a045.png?resizew=272)
(1)求证:∠ACB=90°;
(2)点D是第一象限内该抛物线上的动点,过点D作x轴的垂线交BC于点E,交x轴于点F.
①求DE+BF的最大值;
②点G是AC的中点,若以点C,D,E为顶点的三角形与△AOG相似,求点D的坐标.
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3 . 已知抛物线![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c03e20b8e7a54ee6b85ae8619546ef1.png)
(1)求证:不论k为何实数,此抛物线与x轴一定有两个不同的交点;
(2)若此二次函数图像的对称轴为x=1,求它的解析式;
(3)在(2)的条件下,设抛物线的顶点为A,抛物线与x轴的两个交点中右侧交点为B,若P为x轴上一点,且△PAB为等腰三角形,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c03e20b8e7a54ee6b85ae8619546ef1.png)
(1)求证:不论k为何实数,此抛物线与x轴一定有两个不同的交点;
(2)若此二次函数图像的对称轴为x=1,求它的解析式;
(3)在(2)的条件下,设抛物线的顶点为A,抛物线与x轴的两个交点中右侧交点为B,若P为x轴上一点,且△PAB为等腰三角形,求点P的坐标.
您最近一年使用:0次
2020-09-06更新
|
302次组卷
|
2卷引用:山西省运城市景胜中学2020-2021学年高一上学期入学摸底数学试题
4 . 已知抛物线
,点
.
(1)求抛物线
的顶点坐标;
(2)若抛物线
与
轴的交点为
,连接
,并延长交抛物线
于点
,求证:
;
(3)将抛物线
作适当的平移,得抛物线
,若
时,
恒成立,求
得最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06d4d428a9c757800f58293c0371d764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a52169a3f3ac8fb19edd0f05ed66ceb7.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
(2)若抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a79fb48dc8f1fb1b9e53990843f7520.png)
(3)将抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9290dea6fb79323f26f50ced7ae527d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d7756cf99f47a2521c457eb46918fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309a4d48e25c2944b8b12a01750316d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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5 . 已知二次函数
,设方程
的两个实数根为
和
.
如果
,设二次函数
的对称轴为
,求证:
;
如果
,
,求b的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611957a07b6fc69e62f429b94a0bad0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94f563b3277f2fc80e46baf9aa7070d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/040135d64192de075ba0cc9f11ddbc9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa33c2bd791339d32821077846605d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4141b26d2c32655003494a91ad6331b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce2b81cdcc945ec5da0df9b502d9e903.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d479a86a1711709b2d100fe4daf3e7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05cbed9e2911c9fc7972d958f34b7148.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50aa1911eba92e1fd9a99faca5ecf434.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65863c1abad833b79c303bfca24f535c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b0d1aac8e2a999eafb2a5409ad1c83f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92f78c3bfa830b49b425e8eae3145225.png)
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2018-07-31更新
|
575次组卷
|
4卷引用:湖南省长沙市雅礼中学2022-2023学年高二上学期入学考试数学试题