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1 . 已知函数f(x)=
ax2-(a2+b)x+aln x(a,b∈R).
(Ⅰ)当b=1时,求函数f(x)的单调区间;
(Ⅱ)当a=-1,b=0时,证明:f(x)+ex>-
x2-x+1(其中e为自然对数的底数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(Ⅰ)当b=1时,求函数f(x)的单调区间;
(Ⅱ)当a=-1,b=0时,证明:f(x)+ex>-
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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2018-01-08更新
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570次组卷
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8卷引用:湖南师大附中2018届高三上学期月考试卷(三)(11月) 数学文
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2 . 已知椭圆
:
的离心率为
,短轴长为2.
(1)求椭圆
的标准方程;
(2)若圆
:
的切线
与曲线
相交于
、
两点,线段
的中点为
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f240cccaf24af8a796abb95cb42be52e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c3d833dad7bda8887fdfcaf00bb4c49.png)
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2017-07-24更新
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4卷引用:湖南G10教育联盟2018届高三4月联考数学(理)试题
3 . 已知椭圆
,过右焦点
的直线
交椭圆于
,
两点.
(1)若
,求直线
的方程;
(2)若直线
的斜率存在,在线段
上是否存在点
,使得
,若存在,求出
的范围,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82766cfd2b7c59c7fac5b827ae5863b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03d8889d2ac6c1bdfd44d57022e3ead8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d107e77106ff1a9cb76b504bbc99bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fddfb522b34cecadfb60ae77ea0496cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da1795c5049a1a766f8f33ddede3312a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2017-03-06更新
|
1182次组卷
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3卷引用:2017届湖南省邵阳市高三第一次大联考文数试卷
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解题方法
4 . 已知函数
的图像在与
轴交点处的切线方程为
.
(1)求实数
的值;
(2)若函数
的极小值为
,求实数
的值;
(3)若对任意的
,不等式
恒成立, 则实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db60aab95439a684341c8e296146b8a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac490af25fb49d4f880bbac29a0ee874.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9cd46846950a505c9d08e43d6bdac90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0d5744955c18e465077e09def02769.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若对任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9a4716fb83f55a42c294e57560bc7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a758dc89f9ddd57bbfd774c40e7b238f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
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