1 . 已知函数
,则“
有极值”是“
”的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8928d967ae0e2912df78b91782126f21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d217c7b12e12e5fb67472452518859ec.png)
A.充分不必要条件 | B.必要不充分条件 |
C.充要条件 | D.既不充分也不必要条件 |
您最近一年使用:0次
2024-06-08更新
|
332次组卷
|
5卷引用:江西省部分学校2023-2024学年高二下学期第二次月考(5月联考)数学试题
名校
2 . 已知由样本数据
组成的一个样本,变量x,y具有线性相关关系,其经验回归方程为
,并计算出变量x,y之间的相关系数为
,
,
,则经验回归直线经过( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f29d8b5cbd162d45102f096b8c72dbaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424be9b87feade4edf5d90f9a54099c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f2d8e0a8c86d1e3420dff48fc991618.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80236707adf94837b097689c249c25e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ef610e0a2b181fd7a84ddc19eaea2bb.png)
A.第一、二、三象限 | B.第二、三、四象限 |
C.第一、二、四象限 | D.第一、三、四象限 |
您最近一年使用:0次
2024-06-07更新
|
236次组卷
|
3卷引用:江西省部分学校2023-2024学年高二下学期第二次月考(5月联考)数学试题
3 . 已知
为等差数列,若
,则
的公差为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/322b9b88088a5bf2d1be0b43b062b2cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 已知
,
,若存在
,
,使得
,则
有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f442bb76c918be790a8172101f8ec24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ffccf44a8821fb28b7751a862b92fe1.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/c29f5020d133f458912dc3da22b8127d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1fd218205d557d1bf6e2ca5460d11a.png)
A.最小值为![]() | B.最大值为![]() |
C.最小值为![]() | D.最大值为![]() |
您最近一年使用:0次
解题方法
5 . 已知数列
的前n项和为
,若
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b065334d8f60c49f4bd3d9f1373fe4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92adc768ecb4dba28599db5b9eb50f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b0b0d4362bf3f7c494d8d25c52a8491.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
6 . 已知函数
是奇函数,当
时,
,若
的图象在
处的切线方程为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f5ae606238b7da9fab86d126378bfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef00713e73b8357cc7900144f5505bc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f39179c438fae4a5440c7e49892e0b01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fb2f87452a6a5fe9dd73766b16d66bf.png)
A.4 | B.![]() | C.2 | D.![]() |
您最近一年使用:0次
7 . 已知
双曲线
的渐近线与圆
没有公共点,
数列
中
,且
是递增数列,则p是q的( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51441c8788ff11be766766227793246d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f26c9af86e44b5aa5fd6ab78f98ca3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a353d1a988596880c0a48c2303d20c2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce20ef9c08e82df8c7f45bac6dd31d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2010ed5fc31cb9e86b819a3196d23ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
A.充分不必要条件 | B.必要不充分条件 |
C.既不充分也不必要条件 | D.充要条件 |
您最近一年使用:0次
8 . “对任意
,
是偶函数”的否定是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f093c61867ee4ce75f951d46b9b123.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64444065a5c1cca257687eb5d601d10b.png)
A.存在![]() ![]() |
B.对任意![]() ![]() |
C.存在![]() ![]() |
D.不存在![]() ![]() |
您最近一年使用:0次
9 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/083b8be09e5d986beac935d0d0bd7069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ca9a9ae351925bd28d9811dcc05702.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10 . 已知变量x,y线性相关,利用样本数据
求得的回归直线方程为
,且点
都在直线
上,则这组样本数据的相关系数
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433cba3aca2eb187a0d2ec85f346744d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/297a24d515b59ddb93d0ea84b494602a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433cba3aca2eb187a0d2ec85f346744d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11fb42e7f295134402f0b6605b1cda75.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/258e40e3883271c3580c1d3c805dcac6.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次