名校
解题方法
1 . 红铃虫(Pectinophora gossypiella)是棉花的主要害虫之一,其产卵数与温度有关.现收集到一只红铃虫的产卵数y(个)和温度x(℃)的8组观测数据,制成图1所示的散点图.现用两种模型 ①,
,②
分别进行拟合,由此得到相应的回归方程并进行残差分析,进一步得到图2所示的残差图.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/9/62a92a79-73e4-464a-82d9-70ee12d7a482.png?resizew=444)
根据收集到的数据,计算得到如下值:
表中
;
;
;
;
(1)根据残差图,比较模型①、②的拟合效果,模型________ 比较合适?
(2)根据(1)中所选择的模型,求出y关于x的回归方程__________________ .
附:对于一组数据
,
,…,
,其回归直线
的斜率和截距的最小二乘估计分别为
,
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56a9622a53d958999eecaefc85597b52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1449e6e0d5478519a1131b25cc2bc818.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/9/62a92a79-73e4-464a-82d9-70ee12d7a482.png?resizew=444)
根据收集到的数据,计算得到如下值:
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
25 | 2.9 | 646 | 168 | 422688 | 50.4 | 70308 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb60609a885037dfe04526ee5c7f0fb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4db13f7675d0f843d84935aeffd1eb44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0cd72e800a924d4579dde22f84c3c99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79fb3265a6c81db8c6d36d5336bb5c0a.png)
(1)根据残差图,比较模型①、②的拟合效果,模型
(2)根据(1)中所选择的模型,求出y关于x的回归方程
附:对于一组数据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79ab012a4299d9bfc450a4a71965aeb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72b73e34c383a303b9a6d97023ed42ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87a9634e5f90010ea3cd15b6e182f3cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c105c5aa374f7e2b1bc7615c4809020.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90e921b5c60fd8c106912546555ff2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f99647004e34da0cefe847e6dd2b05d2.png)
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名校
解题方法
2 . 双曲线E:
(
,
)的左、右焦点分别为
,
,已知点
为抛物线C:
的焦点,且到双曲线E的一条渐近线的距离为
,又点P为双曲线E上一点,满足
.则:
(1)双曲线的标准方程为______ ;
(2)
的面积为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19f3fa0b40fb0d9b8c62e37316ab3b04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b48f220f8fc1cb2c4e8ceffec9e2015a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d124b231bf2cd3746f35e6c68cd7178f.png)
(1)双曲线的标准方程为
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33d776753746914c2410a3946c357f35.png)
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名校
解题方法
3 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c66a43bd12b60f74e53f33ad626581.png)
_________ ,
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2604f572a3a2d44ee91cf709c5017d41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c66a43bd12b60f74e53f33ad626581.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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2024-01-19更新
|
650次组卷
|
4卷引用:宁夏青铜峡市宁朔中学2023-2024学年高一下学期开学考试数学试题
宁夏青铜峡市宁朔中学2023-2024学年高一下学期开学考试数学试题北京市丰台区2023-2024学年高一上学期期末练习数学试卷(已下线)【第三课】5.4.1正弦函数、余弦函数的图象+5.4.2正弦函数、余弦函数的性质北京市第三十五中学2023-2024学年高一下学期期中测试数学试卷
解题方法
4 . 设数列
的前
项和为
.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
_____ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
_____ .
![](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/c04d3d54e6dd2a8d8be34a70a6fca502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
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解题方法
5 . 设数列
的前
项和为
.若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
______ .
![](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/cbadb836bd64876a79aeb91dac0308dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7999465d0e871febde66296a0cbf058c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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6 . 已知数列
满足
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
______ ;若
,
,
,
,则当
时,满足条件的
的所有项组成的集合为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11b81f624af0b90591b990f394bb8e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b5779873cb3f4366dbfdb983dec81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fac0d7e69416cb484c9de1ab124a84a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9efeb4455e30293d412938eeea85d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cf1336dd233a8630e7266f0a83dea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/547343b443dba2d77da457f77c21b204.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
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2023-11-14更新
|
196次组卷
|
3卷引用:宁夏回族自治区2023-2024学年高二上学期期末测试数学训练卷(二)(范围:选择性必修第一册 第三章+选择性必修第二册 第四章)
7 . 已知圆锥
的母线长为3,轴截面(过圆锥的轴的平面截圆锥所得截面)等腰三角形的顶角记为
是底面圆
的直径,点
是
的中点.若侧面展开图中,
为直角三角形,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e8049420fef85bedb67023f5ab5314.png)
_________ ,该圆锥中过两条母线的最大截面的面积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84f48ad3c65753755203893b13fe7294.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6e2867f32d3f1c3cd36cd3a11a8580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71e8049420fef85bedb67023f5ab5314.png)
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2023-08-01更新
|
162次组卷
|
2卷引用:宁夏吴忠市2022-2023学年高一下学期期末联合调研考试数学试题
名校
解题方法
8 . 如图,一张
纸的长
,宽
,.M,N分别是AD,BC的中点.现将
沿BD折起,得到以A,B,C,D为顶点的三棱锥,则三棱锥
的外接球O的半径为___________ ;在翻折的过程中,直线MN被球O截得的线段长的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e47cd514b2920609e3781c87df6ab70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8e5ff25f8984d43fbb2413fc87f3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4217f4375caaeef4d4221143d5f6bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
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2023-04-10更新
|
2220次组卷
|
5卷引用:宁夏平罗中学2023届高三第四次模拟数学(理)试题
名校
9 . 已知椭圆
,直线
,则椭圆上的点到直线
距离的最小值为__________ ,最大值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80a47fd46072cd717442cb378d431ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb591e0492fe0a179f91d5bcb5556c5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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2023-08-22更新
|
460次组卷
|
2卷引用:宁夏回族自治区银川市贺兰县第一中学2023-2024学年高二上学期期末复习数学试题(三)
名校
10 . 传说古希腊毕达哥拉斯学派的数学家用沙粒和小石子来研究数他们根据沙粒或小石子所排列的形状把数分成许多类,下图中第一组的1,3,6,10称为三角形数,第二组的1,5,12,22称为五边形数,则三角形数的第7项为___________ ,五边形数的第n项为___________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/22/232d818c-663b-421e-b90e-15b50e94d206.png?resizew=440)
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