1 . 已知向量
,
,函数
.
(1)求
的单调递增区间;
(2)若
且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cccd7b346954551c0cb56ce3bfd5dbc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ff4727045986959811204d6e3bc5b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/296ad175b06482be0514928cd32bfd87.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f102439ebd1efd422f04209ecec2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676b6f2f80005c56548ab9d7ffa8b741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794f2c6bd63355105d179d11306a9cae.png)
您最近一年使用:0次
2017-03-06更新
|
651次组卷
|
3卷引用:2017届重庆市高三上学期第一次诊断模拟(期末)数学(理)试卷
解题方法
2 . 已知数列
满足:
,若
.
(1)求证:数列
是等比数列;
(2)若数列
的前
项和为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e15e34fe59ee9258b2457671fd8d207d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14a89e23cbb54c644241cd0231c09bbd.png)
(1)求证:数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(2)若数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.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/3b9a0d7150fb24be3e28ef7f0e18be93.png)
您最近一年使用:0次
2017-03-06更新
|
573次组卷
|
2卷引用:2017届重庆市高三上学期第一次诊断模拟(期末)数学(理)试卷
3 . 如图,在三棱柱
中,
为
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2017/3/6/1637841422188544/1638732725387264/STEM/44bfb202c297405e98f51b753ae85b2f.png?resizew=221)
(1)证明:
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/311d4d1a6c23ef4675ece1e692b66cbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f32f651907d6c9001655481f79ebda84.png)
![](https://img.xkw.com/dksih/QBM/2017/3/6/1637841422188544/1638732725387264/STEM/44bfb202c297405e98f51b753ae85b2f.png?resizew=221)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cfcf0f3bb4a909c9c1c13bdc53e850.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
您最近一年使用:0次
解题方法
4 . 过椭圆
的左、右焦点分别为
,过
且垂直于
轴的直线与椭圆
相交于
两点,
,点
是椭圆
上的动点,且
的最小值为
.
(1)求椭圆
的方程;
(2)过点
的直线
与椭圆相交于
两点,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c38928a92bc4b44ed3c9b89769f5372.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fd41e8600272b57b0cf2845b28b1584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf10adebe7d6ab8f4f2ecf1c6b20098.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd243fab0af865af67a2ab817e909cf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6670479a0083dd2dfd5ad55b47b1ab6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3832bc3a976853602b5304df70dc21d.png)
您最近一年使用:0次
12-13高三上·重庆·期末
5 . 已知正项数列
满足:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1a2b1df8762c74b4bcc891fefb7c791.png)
(1)求
的范围,使得
恒成立;
(2)若
,证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4514d167a48ac5897fdf73aefaabdcee.png)
(3)若
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d737c1047a14cee12a6671383e244fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1a2b1df8762c74b4bcc891fefb7c791.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70ec091c7f2de1c41d0740f321e63a00.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f4e1236d7dc0366d9523d0cbb426be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4514d167a48ac5897fdf73aefaabdcee.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40f4e1236d7dc0366d9523d0cbb426be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91b1f39687c42e19ed15e396c03d8683.png)
您最近一年使用:0次
12-13高三上·重庆·期末
6 . 如图,已知离心率为
的椭圆
过点M(2,1),O为坐标原点,平行于OM的直线
交椭圆C于不同的两点A、B.
(1)求椭圆C的方程.
(2)证明:直线MA、MB与x轴围成一个等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e2f2d391b1e6304eb2bba560d0ccdd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(1)求椭圆C的方程.
(2)证明:直线MA、MB与x轴围成一个等腰三角形.
![](https://img.xkw.com/dksih/QBM/2014/8/6/1571833191899136/1571833197862912/STEM/716bfafb5b8c4ca7ab289206ab93bd71.png)
您最近一年使用:0次