名校
解题方法
1 . 已知函数
的导函数为
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5241746e4c300cc6ce6f67ef25b71e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a5e9d95bd787a3b7b5713ac209c4fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4dbf9798db6fb412c2b10975ab04022.png)
A.2 | B.![]() | C.10 | D.5 |
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2 . 已知等差数列
前
项和为
,
,
.
(1)求数列
的通项公式及前
项和
;
(2)设
,求数列
前
项和
.
![](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/2693734765399876e9e93cdb110231c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315b41eeea0dbaa395af2474c4ba6acb.png)
(1)求数列
![](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)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14a0186a38c1200be0048f088108fea1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2d51f9147b8265c0276c1f2c2659197.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbd85b79372dc6e596d465f738c3c300.png)
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3 .
是
与
的等差中项,
是
与
的等比中项,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b1b96f5050de3bc7ae53c7bf0c21e8.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.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/61128ab996360a038e6e64d82fcba004.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/e2b1b96f5050de3bc7ae53c7bf0c21e8.png)
您最近一年使用:0次
名校
4 . 已知
的展开式中
的系数为
,若空间中有
个点,其中任意三点不共线,这
个点可以确定的射线条数为
,可以确定的三角形个数为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/315a9b6f77d862bbecf2cdfd762f0d5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/934d37c81b2266c7b86bcc11afaf5f91.png)
A.77 | B.78 | C.251 | D.252 |
您最近一年使用:0次
名校
解题方法
5 . 函数
的零点个数为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/807c0dc90ef7ca390577305d286141ee.png)
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
名校
解题方法
6 . 某兴趣小组调查并统计了某班级学生期末统考中的数学成绩和建立个性化错题本的情况,用来研究这两者是否有关.若从该班级中随机抽取1名学生,设
“抽取的学生期末统考中的数学成绩不及格”,
“抽取的学生建立了个性化错题本”,且
,
,
.
(1)求
和
.
(2)若该班级共有36名学生,请完成列联表,并依据小概率值
的独立性检验,分析学生期末统考中的数学成绩与建立个性化错题本是否有关,
参考公式及数据:
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f9fabbbe61a759e52ec975215e2e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed68c9f4e96f9b89a42ee72c024a802.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53dcf2ed6d5dc7f1c4f725a85b76a69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/193a7c0f42fea61561e8386fc10fa514.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27b6f8cb2faaad82b53b2a66ee817a37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c8d8f50fdbfc2ac51d7fe0e8eabf64.png)
(2)若该班级共有36名学生,请完成列联表,并依据小概率值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0255cd2084765f7019367ff6e575b9d6.png)
个性化错题本 | 期末统考中的数学成绩 | 合计 | |
及格 | 不及格 | ||
建立 | |||
未建立 | |||
合计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187714e660234f0b72f2b47d3ea685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.01 | 0.005 | 0.001 | |
6.635 | 7.879 | 10.828 |
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名校
7 . 假设有两个分类变量
与
,它们的可能取值分别为
和
,其
列联表为:则当
取下面何值时,
与
的关系最弱( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/273e2627c7b43cb387165e64ef07ffc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfad1635e355e32051cd79f83eac6877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f022950e0faa45b617d497b01b5292b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a829fdd8ec0f3b7ede883cf2c3e53b.png)
![]() | ![]() | |
![]() | 10 | 18 |
![]() | ![]() | 26 |
A.8 | B.9 | C.14 | D.19 |
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名校
8 . 已知x,y的对应值如下表所示:若y与x线性相关,且求得的回归直线方程为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c84084dc114a9b879b94e1c054d3c880.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
x | 0 | 2 | 4 | 6 | 8 |
y | 1 | ![]() | ![]() | ![]() | 11 |
A.0 | B.1 | C.2 | D.3 |
您最近一年使用:0次
名校
解题方法
9 . 等差数列
中,
,设数列
的前
项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc625e19e7ca2b9d097f67a3d472e47.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/890644ae83ebb3572c3d001a94de0b0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b91adba8efbf964e9e35547b0fd0ea36.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/3bc625e19e7ca2b9d097f67a3d472e47.png)
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10 . 设甲乘汽车、动车前往某目的地的概率分别为0.3、0.5,汽车和动车正点到达目的地的概率分别为0.6、0.8,则甲正点到达目的地的概率为( )
A.0.62 | B.0.64 | C.0.58 | D.0.68 |
您最近一年使用:0次