12-13高三·广东惠州·阶段练习
解题方法
1 . 已知函数
,
,
(1)若
,求函数
的极值;
(2)若函数
在
上单调递减,求实数
的取值范围;
(3)在函数
的图象上是否存在不同的两点
,使线段
的中点的横坐标
与直线
的斜率
之间满足
?若存在,求出
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e76a892d9d82cbfb65b41229c05fc93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cffa662f0273f0921c1fa4727f632395.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a813b5adbf5c7082561237894ba6d599.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e915b67f8f747698b8b46d37bc453667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6d804ef44bfc64f824b0ccef71765e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e3a1467ecf286e3cadaf5aa006606f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95600ba530b927cbc8b6687e2c6d1b93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
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13-14高二上·陕西西安·期末
2 . 已知函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128101c474107148b622d00251097f9e.png)
(1)若
求a的值;
(2)若a>1,求函数f(x)的单调区间与极值点;
(3)设函数
是偶函数,若过点A(1,m)
可作曲线y=f(x)的三条切线,求实数m的范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/128101c474107148b622d00251097f9e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/456122c92fc282199d71a5cb730a7806.png)
(2)若a>1,求函数f(x)的单调区间与极值点;
(3)设函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68b0589fd0955a1b05e5a54da9cc4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bdc75a92549204f376840e942d95d6e.png)
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10-11高三下·江西赣州·期中
解题方法
3 . 已知数列
的前
项和为
,且
.
(1)求数列
的通项公式;
(2)设数列
满足:
且
,求证:
;
(3)在(2)的条件下,求证:
]
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dc87c1873f5c8c5fde75fec469f48e2.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4be2164a2c67d6163faee87a10942bb.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43b7e7cd571c8cd141cbbfe5d0890bf6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b72ddd7de598464a37b10f03f67b904.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60a9e4784064e951721b8dc75e5f0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac372bc103e51ca8f563010d6a59c40b.png)
(3)在(2)的条件下,求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20f9609f4d94075110dc56dfe0742a27.png)
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10-11高三下·江西赣州·期中
4 . 一根竹竿长2米,竖直放在广场的水平地面上,在
时刻测得它的影长为4米,在
时刻的影长为1米.这个广场上有一个球形物体,它在地面上的影子是椭圆,问在
、
这两个时刻该球形物体在地面上的两个椭圆影子的离心率之比为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c7eb49a823f757461cd5260757b088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
A.1:1 | B.![]() | C.![]() | D.2:1 |
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