名校
解题方法
1 . 某省即将实行新高考,不再实行文理分科.某校为了研究数学成绩优秀是否对选择物理有影响,对该校2018级的1000名学生进行调查,收集到相关数据如下:
(1)根据以上提供的信息,完成
列联表,并完善等高条形图;
![](https://img.xkw.com/dksih/QBM/2020/5/2/2454310669541376/2454880198344704/STEM/d16939f5-41ff-44bf-ac3f-bd6696d8e35c.png?resizew=330)
(2)能否在犯错误的概率不超过0.05的前提下认为数学成绩优秀与选物理有关?
附:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc485c58dbd6e50bfb352030f4a1c42.png)
临界值表:
(1)根据以上提供的信息,完成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
选物理 | 不选物理 | 总计 | |
数学成绩优秀 | |||
数学成绩不优秀 | 260 | ||
总计 | 600 | 1000 |
![](https://img.xkw.com/dksih/QBM/2020/5/2/2454310669541376/2454880198344704/STEM/d16939f5-41ff-44bf-ac3f-bd6696d8e35c.png?resizew=330)
(2)能否在犯错误的概率不超过0.05的前提下认为数学成绩优秀与选物理有关?
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc485c58dbd6e50bfb352030f4a1c42.png)
临界值表:
![]() | 0.10 | 0.05 | 0.010 | 0.005 | 0.001 |
![]() | 2.706 | 3.841 | 6.635 | 7.879 | 10.828 |
您最近一年使用:0次
2020-05-03更新
|
769次组卷
|
5卷引用:湖南省民办学校联盟2019-2020学年高三上学期期中联考文科数学试题
解题方法
2 . 已知数列
是单调递增的等差数列,
且
,
,
成等比数列.
(1)求数列
的通项公式;
(2)设数列
的前
项和
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd807f60189a561ac93ed025445c787e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614206299653e4111ac285f5375e34c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0414c0b6fda7fee5eb71976e09da80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fed5d020c98337bd785b7069d1c717f.png)
(1)求数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
(2)设数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8badb20bba2b47c77cd7f337c4d59dc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
您最近一年使用:0次
解题方法
3 . 已知抛物线
的焦点为
,准线为
,过
上一点
作抛物线
的两条切线,切点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/c5ee3d8a-15b9-4666-a552-8e2ffe671172.png?resizew=168)
(1)求证:直线
过焦点
;
(2)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bb4dd4670828f75bc573b52cdd02e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/21/c5ee3d8a-15b9-4666-a552-8e2ffe671172.png?resizew=168)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e21edb3cf69bc3194ee8b51e73a0d34a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262dbaf62c931a522bf6c14a43a5a685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4392b26f9107a7c7a475e8abcef093c.png)
您最近一年使用:0次
名校
解题方法
4 . 已知函数
.
(1)当
时,求函数
在
处的切线方程;
(2)若
在
上恒成立,求实数
的取值范围;
(3)当
时,求函数
的极大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45d158d474309994e3520f078ea0118.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b4d795709b0abcf47bceec2250f2f9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b666663ce3537a634a3b427b418eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4318a47d7e83d587e74bab4d3d1f6883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b550ee821ee1838384835e81fc34b67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
您最近一年使用:0次
2020-05-03更新
|
341次组卷
|
3卷引用:湖南省民办学校联盟2019-2020学年高三上学期期中联考文科数学试题
解题方法
5 . 在
中,
分别是角
的对边,
,
.
(1)求角
的大小;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc9ec1ea38336f3f7be949cc5c17c55.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
您最近一年使用:0次
2020-05-03更新
|
438次组卷
|
2卷引用:湖南省民办学校联盟2019-2020学年高三上学期期中联考文科数学试题
6 . 如图,在四棱锥
中,底面
是边长为4的菱形,
,
,
分别为
的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/b14dd3c4-e3d3-40b2-bfa5-f92b69a420fd.png?resizew=203)
(1)求证:面
面
;
(2)求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4f5eec0addba78f2e0cdfb7ecc59a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6428c8dffe141f24eb248f728099e09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb605387988b80594c42f01427f3754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdb2c8786b3375fa19b35cd9343a9b7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ca0940f5c21431c089d4f7a221df43c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/b14dd3c4-e3d3-40b2-bfa5-f92b69a420fd.png?resizew=203)
(1)求证:面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500e06ee00d4f3ef97afebe284cc83dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e85e911450d4078b7ee1f52328baf6d5.png)
您最近一年使用:0次
2020-05-03更新
|
183次组卷
|
2卷引用:湖南省民办学校联盟2019-2020学年高三上学期期中联考文科数学试题
名校
解题方法
7 . 已知函数
.
(1)若
在
上为单调函数,求实数a的取值范围:
(2)若
,记
的两个极值点为
,
,记
的最大值与最小值分别为M,m,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0afdec2534921931a391b1b443b818b1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ab5e0524def52baf53480b8726784ed.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8bc125075af26385044f49fe3d21d00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c814128ea2139e33db94ea590e7c2223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec19b68e3add9d5bfcc6269a1855b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c137a9f1c8501a54b8e3f697a52c79e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f511880834175ac4546ea7cc7758b1b0.png)
您最近一年使用:0次
2020-04-24更新
|
494次组卷
|
5卷引用:湖南省邵阳市武冈市2023-2024学年高三上学期期中考试数学试题
8 . 在“挑战不可能”的电视节目上,甲、乙、丙三个人组成的解密团队参加一项解密挑战活动,规则是由密码专家给出题目,然后由
个人依次出场解密,每人限定时间是
分钟内,否则派下一个人.
个人中只要有一人解密正确,则认为该团队挑战成功,否则挑战失败.根据甲以往解密测试情况,抽取了甲
次的测试记录,绘制了如下的频率分布直方图.
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438543029116928/2438980505444352/STEM/ccc75d9db0934506a55c236680a9f4b5.png?resizew=442)
(1)若甲解密成功所需时间的中位数为
,求
、
的值,并求出甲在
分钟内解密成功的频率;
(2)在“挑战不可能”节目上由于来自各方及自身的心理压力,甲,乙,丙解密成功的概率分别为
,其中
表示第
个出场选手解密成功的概率,并且
定义为甲抽样中解密成功的频率代替,各人是否解密成功相互独立.
①求该团队挑战成功的概率;
②该团队以
从小到大的顺序按排甲、乙、丙三个人上场解密,求团队挑战成功所需派出的人员数目
的分布列与数学期望.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0efba7147f5b9ced8bc4a72f0a9fb8af.png)
![](https://img.xkw.com/dksih/QBM/2020/4/10/2438543029116928/2438980505444352/STEM/ccc75d9db0934506a55c236680a9f4b5.png?resizew=442)
(1)若甲解密成功所需时间的中位数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bab424495590c9dfe320f4d85c48177f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
(2)在“挑战不可能”节目上由于来自各方及自身的心理压力,甲,乙,丙解密成功的概率分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/676f23711ee4ea96008f50660ef2ecd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c709117ab1d3ef620883a732aed68b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c05b9832b09731a574d4a4adf7448de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
①求该团队挑战成功的概率;
②该团队以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59c709117ab1d3ef620883a732aed68b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
您最近一年使用:0次
2020-04-11更新
|
879次组卷
|
3卷引用:湖南湖北四校2019-2020学年高三下学期4月学情调研联考理科数学试题
9 . 已知直线
的参数方程为
(
为参数),以坐标原点为极点,
轴的非负半轴为极轴建立极坐标系,曲线
的极坐标方程为
.
(Ⅰ)求出直线
的普通方程以及曲线
的直角坐标方程;
(Ⅱ)若直线
与曲线
交于
,
两点,设
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/228fcb29af4f088bb847ccf9ece2fac8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.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/925b34a1e7a48f450d883f9a0197e5c9.png)
(Ⅰ)求出直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若直线
![](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/f76841988ca278b48da8963f9a5b7d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3979f27823cdcba516dfa885d8afe19d.png)
您最近一年使用:0次
2020-04-08更新
|
258次组卷
|
2卷引用:湖南省怀化市2018-2019学年高三上学期期中文科数学试题
名校
解题方法
10 . 在
中,
,
.已知
分别是
的中点.将
沿
折起,使
到
的位置且二面角
的大小是60°,连接
,如图:
![](https://img.xkw.com/dksih/QBM/2020/3/23/2425940490993664/2426672540499968/STEM/a2108c20-28bc-4d95-bf79-e55d1952becb.png?resizew=504)
(1)证明:平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52856669e6adf246c92923b4bb120d91.png)
(2)求平面
与平面
所成二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa8cee7d2463f6f7d352e8b65f47cf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b7308135fda2e4b9b16457b6aa12df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d70de1ffdd9aa376b09bbcfa12644a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943f657dadcdf419f6178b00ba897e1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7807f6a0d316671ed34c23e32fc7408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7268ba86f707879fab1e23f31809763b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56dbd4e4011c5c6f0aa3779d7b24c661.png)
![](https://img.xkw.com/dksih/QBM/2020/3/23/2425940490993664/2426672540499968/STEM/a2108c20-28bc-4d95-bf79-e55d1952becb.png?resizew=504)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d002fa69aa1f733593034296a38faff7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52856669e6adf246c92923b4bb120d91.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ded3e6f9517494539067376c8e4514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/330808dc42f8e244c35791d572d83a57.png)
您最近一年使用:0次
2020-03-24更新
|
1304次组卷
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11卷引用:湖南湖北四校2019-2020学年高三下学期4月学情调研联考理科数学试题
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