1 . 已知
.
(1)当
时,解不等式
;
(2)若
,解关于x的不等式
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/408c35b47c51d5bbaee8cffd48f1a5ad.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/200f24e682c93e02a87f3f9d57dc5d40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e38c541dec8fce1d26886e5ef7d21f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dc9ede2e55724383dd1093fc7fcdb59.png)
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2019-12-30更新
|
331次组卷
|
4卷引用:重庆市大足区2018-2019学年高一下学期期末数学试题
2 . 设
的内角为
所对的边分别为
,且
.
(1)求角
的大小;
(2)若
,求
的周长
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b3337efb828a877c9edeb75fcbd021.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2017-11-27更新
|
944次组卷
|
4卷引用:重庆市大足区2018-2019学年高一下学期期末数学试题
3 . 在数列
中,
,
(
).
(1)求
,
,
的值;
(2)猜想这个数列
的通项公式,并证明你猜想的通项公式的正确性.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/950c6303c2ec03e48137be8addf9245c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/930bc56406e69b785b37a83d48e36724.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
(2)猜想这个数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d471926f7b27322d90c82b9ce21d3d.png)
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4 . 如图,在四棱锥
中,
,底面ABCD是边长为3的正方形,E、F、G分别是棱AB、PB、PC的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/39e82a74-0307-418f-83b2-b98235dee163.png?resizew=292)
(Ⅰ)求证:平面EFG∥平面PAD;
(Ⅱ)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a4426db778693c875e2dca9220875d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c19f0fcacac715a1200770516d1e4a67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d0f60d9856f286e537788a99377590.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/39e82a74-0307-418f-83b2-b98235dee163.png?resizew=292)
(Ⅰ)求证:平面EFG∥平面PAD;
(Ⅱ)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98ad0298c0f7878cb7c4dd7a141cd952.png)
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5 . 已知函数
.
(1)求此函数
的单调区间;
(2)设
.是否存在直线
(
)与函数
的图象相切?若存在,请求出
的值,若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac2a66e2f5282b3b595b68128b227f0f.png)
(1)求此函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5772cf771ac83052aaf7b35e794b52d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b97b295f88972ba1c7e3cefda0885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be1ce3f01e2b6364f9a9fdaf197d5e29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
名校
6 . 为了调查生活规律与患胃病是否与有关,某同学在当地随机调查了200名30岁以上的人,并根据调查结果制成了不完整的列联表如下:
(1)补全列联表中的数据;
(2)用独立性检验的基本原理,说明生活无规律与患胃病有关时,出错的概率不会超过多少?
参考公式和数表如下:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc485c58dbd6e50bfb352030f4a1c42.png)
不患胃病 | 患胃病 | 总计 | |
生活有规律 | 60 | 40 | |
生活无规律 | 60 | 100 | |
总计 | 100 |
(1)补全列联表中的数据;
(2)用独立性检验的基本原理,说明生活无规律与患胃病有关时,出错的概率不会超过多少?
参考公式和数表如下:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc485c58dbd6e50bfb352030f4a1c42.png)
![]() | 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 |
您最近一年使用:0次
2020-02-08更新
|
202次组卷
|
2卷引用:重庆市大足区2018-2019学年高二下学期期末数学(文)试题
7 . 已知直线l:
与圆C:
相交于
,
两点.
(Ⅰ)求圆C的圆心坐标和半径;
(Ⅱ)求弦
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6dc749128e8075c763f5cba9ff9888a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f308668d4851884b03c3475dff4ef65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(Ⅰ)求圆C的圆心坐标和半径;
(Ⅱ)求弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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11-12高二·山东潍坊·假期作业
8 . 在等差数列
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a180b409f23cdf1c2519d18823d5d710.png)
(Ⅰ)求通项
;
(Ⅱ)求此数列前30项的绝对值的和.
![](https://img.xkw.com/dksih/QBM/2015/10/10/1572256853147648/1572256858791936/STEM/f3f67f894a2244c9be9b60c3f8306e54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a180b409f23cdf1c2519d18823d5d710.png)
(Ⅰ)求通项
![](https://img.xkw.com/dksih/QBM/2015/10/10/1572256853147648/1572256858791936/STEM/68c7483ff74c494f8e58f854d5b37e2f.png)
(Ⅱ)求此数列前30项的绝对值的和.
您最近一年使用:0次
2016-12-03更新
|
1506次组卷
|
3卷引用:重庆市大足区2018-2019学年高一下学期期末数学试题
9 . 设全集
,集合
,
,集合
.
(1)当
时,求
,
;
(2)若
,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860ebb6f76cd3cb9a265dfc233002a13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a89ff2d162e8dc9aa939a10b37f14810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b977602c6f845e04142e61613d4cd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec71b5cad4d3f24bc4b696e75dac2ade.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a3cc8c48bf54ec8252e5dce6867754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fdbfa7a63fdf5717d40c8c9a73ec160.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3744e71abf4b43e128eabea9181b712.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f086bfe79ed792e6e98e496dd25b82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解题方法
10 . 如图,在三棱柱
中,
,
,
是棱
的中点,侧棱
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/36024a3a-e7ba-4d24-a797-411224e218aa.png?resizew=190)
(Ⅰ)求异面直线
与
所成的角;
(Ⅱ)求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22baaea72c9286f1d8d7b99c37755678.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96a6b20a35af7755e5d90789ea862da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/36024a3a-e7ba-4d24-a797-411224e218aa.png?resizew=190)
(Ⅰ)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
(Ⅱ)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ba9e20d667d04bf3ee7f55cc795ce01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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