1 . 下列说法中正确的是
A.若命题![]() ![]() ![]() ![]() |
B.若“![]() ![]() |
C.已知![]() ![]() ![]() |
D.命题“若![]() ![]() |
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2 . 已知
为抛物线
的焦点,过
作倾斜角为
的直线
与抛物线
交于
两点,过
向
的准线作垂线,垂足分别为
,设
的中点为
若
,则
的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/673eea8628a08851867e6e5b719ae4c3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c29a7e8eea08197bf53164a560bee58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f249e6a70954cc42a13ebecd7e71961d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b8aed33984ccc91282d8a1c2be27cd0.png)
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3 . 已知锐角
的内角
的对边分别为
,且
,则
的面积的最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38335830b93ac4d99c28a8e209eecb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f5573b30734d65648f61c0a94c98de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7779da911dd96c266df532df3fbf56fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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4 . 已知向量
,
,
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72570757db98eae7543a123d47d829e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3dfffcecda7289a3707e70e44f4be6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27deaba3a189d53d9e9d3502c41f6f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
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2018-04-26更新
|
467次组卷
|
4卷引用:四川省攀枝花市2018届高三第三次(4月)统一考试数学文试题
四川省攀枝花市2018届高三第三次(4月)统一考试数学文试题【全国市级联考】山东省日照市2018届高三校际联考理科数学试题山东省日照五莲县丶潍坊安丘市、潍坊诸城市、临沂兰山区2020届高三6月模拟数学试题(已下线)2021届高三数学新高考“8+4+4”小题狂练(26)
5 . 已知
是公差为2的等差数列.数列
满足
,
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d6638f7380be0277a375697644a964.png)
(I)求数列
和
的通项公式;
(Ⅱ)设
,数列
的前
项和为
,证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a24e6bcf49b8e45531a2d4e4c70c181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe5007cf5afb87e8f4667438d7e3ce88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d6638f7380be0277a375697644a964.png)
(I)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0af7860e024bd38f5c45a34d602d0d16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.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/1302abaebc9df026c2a83291063e83b4.png)
您最近一年使用:0次
2018-04-26更新
|
1367次组卷
|
4卷引用:四川省攀枝花市2018届高三第三次(4月)统一考试数学文试题
6 . 党的十九大报告指出,要推进绿色发展,倡导“简约知适度、绿色低碳”的生活方式,开展创建“低碳生活,绿色出行”等行动.在这一号召下,越来越多的人秉承“能走不骑,能骑不坐,能坐不开”的出行理念,尽可能采取乘坐公交车骑自行车或步行等方式出行,减少交通拥堵,共建清洁、畅通高效的城市生活环境.某市环保机构随机抽查统计了该市部分成年市民某月骑车次数,统计如下:
联合国世界卫生组织于2013年确定新的年龄分段:44岁及以下为青年人,45岁至59岁为中年人,60岁及以上为老年人.
(I)若从被抽查的该月骑车次数在
的老年人中随机选出两名幸运者给予奖励,求其中一名幸运者该月骑车次数在
之间,另一名幸运者该月骑车次数在
之间的概率;
(Ⅱ)用样本估计总体的思想,解决如下问题:
(
)估计该市在32岁至44岁年龄段的一个青年人每月骑车的平均次数;
(
) 若月骑车次数不少于30次者称为“骑行爱好者”,根据这些数据,能否在犯错误的概率不超过0.001的前提下认为“骑行爱好者”与“青年人”有关?
参考数据:
人数 年龄 | ||||||
18岁至31岁 | 8 | 12 | 20 | 60 | 140 | 150 |
32岁至44岁 | 12 | 28 | 20 | 140 | 60 | 150 |
45岁至59岁 | 25 | 50 | 80 | 100 | 225 | 450 |
60岁及以上 | 25 | 10 | 10 | 19 | 4 | 2 |
(I)若从被抽查的该月骑车次数在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d28c69eb9c905a6f415c88cd4c1e01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77494088d55150e64c52bde4ca12c553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/367121cf58254c13a23e5e44ff0ae4c9.png)
(Ⅱ)用样本估计总体的思想,解决如下问题:
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3661316205a08b035810dcf603480ce9.png)
参考数据:
0.50 | 0.40 | 0.25 | 0.15 | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 | |
0.455 | 0.708 | 1.323 | 2.072 | 2.706 | 3.841 | 5.024 | 6.635 | 7.879 | 10.828 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a58baa34c9c89d08de8e0f10f792fd1.png)
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解题方法
7 . 已知
为虚数单位,若复数
是纯虚数,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d826a125320108541cc91ea2450ba58f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66890a0bf9ab35aca7bf1a2773fcd7f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4887473a8091e1ef53a169cc9f211e3a.png)
A.![]() | B.0 | C.1 | D.2 |
您最近一年使用:0次
2018-04-26更新
|
369次组卷
|
3卷引用:四川省攀枝花市2018届高三第三次(4月)统一考试数学文试题
8 . 选修4-5:不等式选讲
已知函数
.
(I)求不等式
的解集;
(Ⅱ)若正数
满 足
求证:
.
已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0913eab8e67121cd62aad9cef70c1711.png)
(I)求不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38f1bb9ef7a7cbff904b40824854bc49.png)
(Ⅱ)若正数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/280860dd039e1305a5ccc455f63e8223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384bcd5b965e5204e33ddbd1d45a9b47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31a3bf0471ce688de9131f3059d7fc42.png)
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9 . 执行如下图所示的程序框图,则输出的![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d035478f3ae3fa0960d8092cc664a29.png)
![](https://img.xkw.com/dksih/QBM/2018/4/21/1928939544780800/1932192225484800/STEM/74962deafbbb4f109a737cf776c964b0.png?resizew=127)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d035478f3ae3fa0960d8092cc664a29.png)
![](https://img.xkw.com/dksih/QBM/2018/4/21/1928939544780800/1932192225484800/STEM/74962deafbbb4f109a737cf776c964b0.png?resizew=127)
A.![]() | B.![]() | C.![]() | D.2 |
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解题方法
10 . 已知函数
,
.
(1)若函数
在区间
上均单调且单调性相反,求实数
的取值范围;
(2)若
,证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fa9fd26de450307865246d3a92eb4b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/700097ded296a481ba5e319944d58aa6.png)
(1)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c0ed188d083966baaae94e6b86064f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab1242ec96ac54e2fd418988d5190a88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e14206c7d228a7c2259a7b27da8813.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cc807f76d58df49f083de0c4a21eff3.png)
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