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解题方法
1 . 若
的展开式中
的系数为40,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37a73f29a1fb014c93b2ee960ed78ff6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0a89e3c30f6e4d4c5db4378b05d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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名校
2 . 已知正方体
的棱长为1,
,
,
分别在
,
,
上,并满足
(
),若
是
的重心,且
,则实数
值为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b94ce22f30a8de2af135de3c89403aff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe620619173c9d252ffb8b998ab1570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540ccd15435aa2d59e809d6a28fb2467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c28abb154f41e1ca9816c9c9c2433ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65cbe9ae7ad963bbc34751972407a6e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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3 . 由数据
可得
关于
的线性回归方程为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dd3df2203ad477a391ce4da2bc71bb.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a0d7f2407d2675876ad46a6a3d7cfb5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44a01a9162e86ae5838e19158942f4b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eabb220259c8e9c24db37b5f96185add.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dd3df2203ad477a391ce4da2bc71bb.png)
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名校
4 . 设随机变量
的分布列为
(
),则实数
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0973a3e17dc1abd2edbdfa50bc866967.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5869653c67df9d50dd7f0cbb08d468f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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2022高三·全国·专题练习
5 . 若将函数
的图象向右平移
个单位,所得图象关于
轴对称,则
的最小正值是_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c5c12d634d89fa6c1db1b95759efd08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
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8卷引用:专题05 高一下期末考前必刷卷03-期末考点大串讲(人教A版2019必修第二册)
(已下线)专题05 高一下期末考前必刷卷03-期末考点大串讲(人教A版2019必修第二册)(已下线)专题01三角函数的图象与性质-讲案 (文科)第一篇 热点、难点突破篇-《2022年高考文科数学二轮复习讲练测》(全国课标版)(已下线)第04讲 三角函数-【寒假自学课】2022年高一数学寒假精品课(苏教版2019必修第二册)(已下线)类型三 三角函数中的范围、最值问题-【题型突破】备战2022年高考数学二轮基础题型+重难题型突破(新高考专用)(已下线)7.3 三角函数的图象和性质(4)(已下线)第15题 三角函数图象定式,各类性质一目了然(优质好题一题多解)(已下线)专题09 三角函数填空题(理科)-1重庆市永川北山中学校2024届高三下学期高考预测卷(最后一套)数学试题
6 . 用4种不同颜色的颜料给图中五个区域涂色,要求每个区域涂一种颜色,有公共边的两个区域不能涂相同的颜色,则不同的涂色方法共有______ 种.
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4卷引用:内蒙古名校联盟2023-2024学年高二下学期教学质量检测数学试题
7 . 设随机变量
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbae883ac71d106ea17f6c9de1092a7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/631429c4c924638d9f6688ecda1094fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f72e21fb676122148ea985159a007358.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5be1440d099f464ef46dee39de6010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbae883ac71d106ea17f6c9de1092a7.png)
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名校
解题方法
8 . 若数列
的前
项和为
,且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.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/9949148b911895e7745a53b755a3b36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfc875ca919921e8f63a6fca648561b.png)
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9 . 在
中,
是
的中点,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f763c492745451df3c4dbcc9fcbfe3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a22b02f6c8636152aeb62d191251e931.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
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10 . 如图,在河岸同侧有甲、乙两个工厂,甲工厂位于笔直河岸的岸边
处,乙工厂位于离河岸40公里的
处,BD垂直于河岸,垂足为
且与
相距50公里.两个工厂要在此岸边A,D之间合建一所供水站
,从供水站到甲工厂和乙工厂铺设水管的费用分别为每公里3a元和5a元,供水站建在与甲工厂相距____________ 公里,可使铺设水管的总费用最省.
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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