1 . 对于一个给定的数列
,把它的连续两项
与
的差
记为
,得到一个新数列
,把数列
称为原数列
的一阶差数列.若数列
为原数列
的一阶差数列,数列
为原数列
的一阶差数列,则称数列
为原数列
的二阶差数列.已知数列
的二阶差数列是等比数列,且
,则数列
的通项公式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
__________ ;数列
的通项公式![](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/090426eb29836bc30c006b3739c08057.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96abfe2da27a63e6affb19a0c80236d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fcde3a21ad686b1befcaefea2b6f5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/686ece75006ad358f23314dc8a246e11.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/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57ef6d44448092ebdb9e4a49d866a749.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa2eddb4f897d391cc8b417054978a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034ba25825c13725931c483aa47c9363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/414187fca31df508dbf88d7f2bb83662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3f7fda69e2b32b9ced2239f915fa59b.png)
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解题方法
2 . 已知
,
,且
,则
的最小值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/741e2688a74257784f51cee830c0732a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/061813f1ec633c5c4c393c4de7938322.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ceec4b56e0743426ce72c3fc50c0333.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e76e71f806f399f70e8627f9a63c106.png)
您最近一年使用:0次
2024-01-13更新
|
1099次组卷
|
3卷引用:贵州省部分中学2024届高三上学期第四次月考数学试题
名校
3 . 如果平面向量
,则向量
在
上的投影向量的坐标为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b06c8b843707d0015f509d9c90866a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
您最近一年使用:0次
名校
4 . 在
中,内角
所对的边分别为
,则
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0de0acfcbaff0fe3e7749b466b56ad78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2024-01-07更新
|
846次组卷
|
5卷引用:贵州省贵阳市第一中学2023-2024学年高三上学期高考适应性月考(四)(12月)数学试题
贵州省贵阳市第一中学2023-2024学年高三上学期高考适应性月考(四)(12月)数学试题(已下线)结业测试卷(范围:第六、七、八章)(基础篇)-【寒假预科讲义】(人教A版2019必修第二册)(已下线)11.2 正弦定理-【帮课堂】(苏教版2019必修第二册)(已下线)第6.4.3讲 正弦定理(第2课时)-同步精讲精练宝典湖南省娄底市普通高中学业水平合格性考试(三)数学试题
名校
解题方法
5 . 已知抛物线
的焦点为
,过点
的直线
交抛物线于
两点,
的中点为
,以
为直径的圆与
轴交于
两点,当
取最大值时,此时![](https://staticzujuan.xkw.com/quesimg/Upload/formula/477fddf837d4fd6b5afb4cc65bccac04.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/477fddf837d4fd6b5afb4cc65bccac04.png)
您最近一年使用:0次
2024-01-07更新
|
962次组卷
|
3卷引用:贵州省贵阳市第一中学2023-2024学年高三上学期高考适应性月考(四)(12月)数学试题
6 . 已知函数
,
,且
,都有
,若函数
在
上有且只有一个零点,则
的最大值为____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db77de4df5ce7e8ff4be6ddb4f998918.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96b743603ab1c10330622f16db78dbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83703d33e8e04872aa316347b2133bfb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3033291263ef14fbb35ae296117337b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aec270afb8bfe12737ef8a8f7dd4bf1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
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7 . 牛顿曾经提出了在常温环境下的温度冷却模型
(t为时间,单位:分钟,
为环境温度,
为物体初始温度,
为冷却后温度),假设一杯开水温度
,环境温度
,常数
,大约经过________ 分钟水温降为30℃(参考数据:
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6861ea66b004cf4b9058032e2d3df15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a4438bae1705c0f26beddf41322c087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f64fa38725c136504f723019a18dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf00b2b38708ff34059b6970e9f38a41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2fc0f9104ff36aab0aa266390af0ff0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d81febf743fd2ea37bb596890773f700.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12a76edbb3e98e3ff41c03401769d1c.png)
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8 . 已知点F为抛物线
的焦点,
为抛物线上一点,且
,则该抛物线的准线方程为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf54a163cef69c4650f6dd0894f575ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83b173a5c1a243794a788b2a041da4a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1584d07b1e2ddc64349f0f5940f3a3e.png)
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9 . 已知
,若
有四个不同的零点,则t的取值范围是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbad69de967d3873f571c72e4e4e49fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e89c2e159c04dee55d4b8ef18809fb45.png)
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2023-12-28更新
|
940次组卷
|
3卷引用:贵州省铜仁市石阡县民族中学等校2024届“3+3+3”高考备考诊断性联考(一)数学试题
贵州省铜仁市石阡县民族中学等校2024届“3+3+3”高考备考诊断性联考(一)数学试题江苏省苏州市南航苏州附中2024届高三上学期零模模拟数学试题(已下线)微考点2-1 新高考新试卷结构中导数中零点根的个数问题(2大题型)
解题方法
10 . 已知向量
,
,
满足
,
,
,则
的最大值是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0150d9c357f2f8f8deecacd3ef0545cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f93ac20aa3f83b16dc7e9444beda19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d1209bee09e893f143d8982b2dc9d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84ade434cfd990949f8ae1f39da78e3c.png)
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