1 . 数列
的前
项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64618106f0de801de4240dd29f0eddbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c2864e2ec3416cc4c081ac1f71a0af.png)
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2022-07-29更新
|
949次组卷
|
4卷引用:内蒙古自治区巴彦淖尔市2021-2022学年高一下学期期末数学试题
解题方法
2 . 已知40码的鞋长25厘米,38码的鞋长24厘米,设n码的鞋长
厘米,且数列
为等差数列,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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名校
解题方法
3 . 如图数表,它的第一行数由正整数从小到大排列得到,此后下一行数由前一行每两个相邻的数的和写在这两个数正中间下方得到.依次类推,则该数表中,第n行第1个数是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b47ff866f4b39a9ccb78cc4347390b9d.png)
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解题方法
4 . 设
为等差数列
的前n项和,若
,则满足
的最大的正整数n的值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8886e3a4fb698d4683237bef65c85fd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49763402b2f2023f0ba64c37924267d3.png)
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2022高三·全国·专题练习
名校
5 . “中国剩余定理”又称“孙子定理”,讲的是一个关于整除的问题.现有这样一个整除问题:将1到2 021这2 021个数中,能被3除余2且被5除余2的数按从小到大的顺序排成一列,构成数列{an},则此数列所有项中,中间项的值为______ .
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2022-05-07更新
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977次组卷
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3卷引用:内蒙古呼伦贝尔市海拉尔第二中学2022届高三下学期最后一模数学(理)试题
解题方法
6 . 已知直线
:
,其中
,
,
成等差数列,则直线
恒过定点_________ ,若
,
,过点
作直线
的垂线,垂足为
,则
的最大值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f6e1f67dc15c3cf135a78af95c70fe.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/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cc0f9aa168e43cc5759f017d69b498.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b32a92039ba74fca3ff47ec3b184c41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/084cf5ffced059f5653ee2a1023518b7.png)
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解题方法
7 . 已知
为等差数列,公差为
,且
,则前10项和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/835f95f9f2a134141fd315a1a8d84f39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5af1f1b7e9e20d799ee3c06b89a0611c.png)
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2022-04-15更新
|
534次组卷
|
2卷引用:内蒙古赤峰二中2021-2022学年高一下学期第一次月考数学试题
名校
解题方法
8 . 已知数列
为等比数列,公比
,
,
,
,
成等差数列,将数列
中的项按一定顺序排列成
,
,
,
,
,
,
,
,
,
,…的形式,记此数列为
,数列
的前n项和为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da13d38b5bfe409ad174de50a3faabe.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45482d31d1d7448c9f3922b4d2a55331.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b13a6e1d671215fc96e4bee3541d1096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7755b0ec8df40da1e10c3567e441be7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b2667a6c91b720ca9b42d092c776cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e72adb45c60c2f63b46e65ff787302bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e88093a749c0d46e0ee931ecfaff925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c1ccc6c74b8754e9bcbb3f39a11b6f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daf464629fa321a6ff7401ab79f07083.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4da13d38b5bfe409ad174de50a3faabe.png)
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2022-03-29更新
|
261次组卷
|
3卷引用:内蒙古自治区赤峰二中国际实验学校2023届高三上学期12月月考理科数学试题
名校
解题方法
9 . 将数列
按“第n组有n个数”的规则分组如下:
,
,
,…,则第100组中的第一个数是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deca922f74f28aa9ab391cb0202a31a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bf6c84731e5e1bd335ecfc2d36c3d81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91edacbac6148537c961bbb673c84dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f045e4763db222fa5feb8e155076dc3b.png)
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2022-02-28更新
|
343次组卷
|
8卷引用:内蒙古赤峰二中2021-2022学年高二下学期第一次月考数学(文)试题
10 . 已知数列
的通项公式是
,数列
的前n项和为
,且
.那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf37042b7cb6a358b905f67dca51109.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80180e6e8cd59f80d37923d3187cc590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b97a46f37fd3b2d9493777ed61fc35b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf37042b7cb6a358b905f67dca51109.png)
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2022-02-17更新
|
773次组卷
|
4卷引用:内蒙古自治区赤峰红旗中学2022届高考考前适应性考试理科数学试题
内蒙古自治区赤峰红旗中学2022届高考考前适应性考试理科数学试题陕西省咸阳市2022届高三下学期一模理科数学试题(已下线)NO.3 练悟专区——客观题满分练(一)-2022年高考数学二轮复习讲练测(新教材·新高考地区专用)湖北省武汉市部分重点中学2021-2022学年高二下学期3月联考数学试题