解题方法
1 . 满足方程
的整点
(即
都是整数)称为佩尔方程
的解,其中
是给定的整数.当
是无理数时,记
.若
,使得
恒成立,则称
为方程的基本解.佩尔方程的所有正整数解
可由基本解
导出,具体关系为:
.则佩尔方程
的基本解为___________ ;佩尔方程
满足
的正整数解构成的集合为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91ab84b14667a6f4961325c5bea02025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a79a33a83a7ba57a34b5093d1d1d02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91ab84b14667a6f4961325c5bea02025.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ea87d3049803c3071a2d38ab05ce09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077a3b45ec38e236d52b8484d6c793f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302b2f4bdd821c9acb35c6c380dfebd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd6d147676f372b55132f394f37d6e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92abae836b8026511113ad8c3ea23028.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56720e2f2b0ddd72156da495923698da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac9f4c02e9a90ef87a465f57dd09b50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ad120ce64035347eb7325fae9617c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6ad120ce64035347eb7325fae9617c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf3f6e9466b26c1b79a45f23e028bb4.png)
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2022-01-05更新
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462次组卷
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2卷引用:河南省高考联盟 2021-2022学年高三上学期12月教学检测理科数学试题
名校
解题方法
2 . 长江是我国第一大河,永葆长江生机活力是事关中华民族伟大复兴和永续发展的千秋大计.2020年1月1日起实施的10年全年禁渔令,是我国保护长江的百年大计,是保护后代子孙生活环境的重大举措.某科研机构发现:在理想状态下,鱼群数量
随时间
的增长满足指数模型:
,其中
表示初始时刻的鱼群数量,
表示鱼群的增长率.该科研机构在某个监测站从2021年1月到2021年7月每个月测一次数据,数据整理如下:
(1)根据上表与参考数据,建立理相状态下鱼群的数量
关于时间
的回归方程;
(2)科研机构认为在实际状态下鱼群的增长率
与某个环境指标
满足关系:
(其中
与每年禁渔的总时间
(单位:月)
有关,
.)
(i)在2020年起实施全年禁渔令以后,若希望鱼群数量增加,如何控制环境指标
的取值范围?
(ii)在2020年之前,长江每年的禁渔时长为3个月,请说明我国在2020年起实施全年禁渔令的科学性.
参考数据
其中
参考公式:对于一组数据
,其回归直线
的斜率和截距的最小二乘估计公式分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce232a02d243a9ae30477b06ef6dcbde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
时间![]() | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
鱼群数量![]() | 8 | 10 | 14 | 24 | 41 | 76 | 93 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)科研机构认为在实际状态下鱼群的增长率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4327bc8fa6bc5ada114fa73e9d7692ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4d720bb39488a8278822dda3d66f23f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9630a2863f301da36966eb5fc86ddb02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d67df8dec23d04f4382c4a46c3ff38d4.png)
(i)在2020年起实施全年禁渔令以后,若希望鱼群数量增加,如何控制环境指标
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(ii)在2020年之前,长江每年的禁渔时长为3个月,请说明我国在2020年起实施全年禁渔令的科学性.
参考数据
![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
38 | ![]() | 1478 | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/135da496c220b2178dac5be602bef118.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69f22ea836f2025901725da985790579.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f27e98f5555089692253c0c3f2ec0d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c43638e6163763b77510d64b865bb08c.png)
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534次组卷
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4卷引用:重庆市第八中学2022届高三上学期高考适应性月考(四)数学试题
解题方法
3 . 一块三棱锥形状的余料
,其三条侧棱
,
,
两两垂直.现需将其切割成直三棱柱,使得直三棱柱的侧棱与原三棱锥的一条侧棱平行或重合.若
,
,
,则切割得到的直三棱柱的最大体积为___________ ;不失一般性,若
,
,
,则切割得到的直三棱柱的最大体积为___________ .(结果用
,
,
表示,其中
,
,
为正实数).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b336e518ac4ff04c6c26e4b8a15844.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eea78bf026d76f1cb9cc3dc9349a193.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00803e67a5d417a9a4dc00277fca778b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/495636df02b96acab4478baabe77bafa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69acd73890957b0007b30fd81f2abc0e.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
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名校
4 . 已知函数
,下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba433b0ed5730b0a283a3cb2fc000f1.png)
A.当![]() ![]() ![]() ![]() |
B.函数![]() ![]() ![]() |
C.函数![]() ![]() |
D.![]() |
您最近一年使用:0次
2021-11-29更新
|
1197次组卷
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11卷引用:河北省部分学校2022届高三上学期11月质量检测数学试题
河北省部分学校2022届高三上学期11月质量检测数学试题福建省部分名校2022届高三11月联合测评数学试题(已下线)热点15 导数与函数的单调性、极值、最值问题-2022年高考数学【热点·重点·难点】专练(全国通用)江苏省淮安市涟水县第一中学2022-2023学年高三上学期第一次阶段检测数学试题江苏省苏州市高新一中科技城校区2021-2022学年高二下学期调研3月数学试题黑龙江省齐齐哈尔市五校联考2023-2024学年高三上学期期中考试数学试题黑龙江省齐齐哈尔市拜泉县第一中学2023-2024学年高三上学期期中考试数学试题山东省菏泽市东明县第一中学2021-2022学年高二下学期3月月考数学试题江苏省苏州市常熟市2021-2022学年高二下学期期中数学试题广西河池市2022-2023学年高二下学期第一次月考名校联考数学试题河北省邯郸市永年区第二中学2022-2023学年高二下学期期中数学试题
解题方法
5 . 某城市公园有一如图所示的绿化带,其形状由一个直径为
的半圆
和矩形
组成,其中
.管理部门规划在圆心
处建造一个亭子,为了方便游客到亭子游玩,决定从A地出发修建一条经过亭子
处到达
的公路,具体路线是:在半圆
上选点
(异于
,
点),从点
沿圆弧到点
,再从点
经过亭子
的直线到达
边上的点
处.已知从点
到点
的修路费用每千米需要
元,从点
到点
的修路费用每千米需要
元,设
弧度,从
地经点
,
到
地修路所需费用为
元.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/174f2b91-c470-4045-8e59-b291190728e3.png?resizew=144)
(1)试将
表示为
的函数
,并写出定义域;
(2)当
取何值时,修路所需费用最少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26016c9a610be4da74086a37c3327d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61322bc59ed9c2419acf31d42ce4d17f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2564bf6e8c421b22dfb26f6837ede1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09bd4c637c65384d1a8138e42d31641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f5a953038f38cce86187f1619f6876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/174f2b91-c470-4045-8e59-b291190728e3.png?resizew=144)
(1)试将
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96eecf3f5484148eddcae82248dc1fa4.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
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解题方法
6 . 已知函数
的最小值为0,
为自然对数的底数,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e610461dca02ae65e29cad237f553eaf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/041a7c8fc017f596542c5e6ec7d1c40b.png)
A.![]() ![]() |
B.![]() ![]() |
C.![]() ![]() |
D.![]() ![]() |
您最近一年使用:0次
名校
7 . 已知函数
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffdaf6ce8c6055355f8904726b311df.png)
(1)直接写出曲线
与曲线
的公共点坐标,并求曲线
在公共点处的切线方程;
(2)已知直线
分别交曲线
和
于点
,
.当
时,设
的面积为
,其中O是坐标原点,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdc873fc03e6e4d3c4ba02f8b1147b20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffdaf6ce8c6055355f8904726b311df.png)
(1)直接写出曲线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b53b86bd516400d6fa7dabb3603f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1938c093dd2fbcb752d0eb7a18d143b2.png)
![](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/eb095e9f5abae37f91650bb8d751a977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9768bacd90ba3b23403f0449c44e822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9768bacd90ba3b23403f0449c44e822.png)
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2021-11-04更新
|
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|
3卷引用:北京市海淀区2022届高三上学期期中练习数学试题
名校
解题方法
8 . 若函数
在定义域内的图像上的所有点均在直线
的下方,则称函数
为定义域内
的“下界函数”.若函数
为定义域内
的“下界函数”,则
的最大值减去
的最小值等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ff39dd1dfc9caf911ad0d11ba21d66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec9d212b0337b390db8dae42593e7e77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bda9c1be7da4d3b188de03d11660917c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
A.2 | B.3 | C.4 | D.5 |
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2卷引用:黑龙江省佳木斯市第一中学2021-2022学年高三上学期第四次调研考试文科数学试题
9 . 已知函数
是定义在R上的奇函数,且对于任意的
都有
成立,若
,则下列结论成立的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65cee351c7053fc8f689c4f7cc7a64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/717a1efcded39ade5c5e98eeb21013e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa2f45bf5cd339c08dc01fb58e79d54.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
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解题方法
10 . 已知函数
,下列说法正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0d6f027867416ff54a1da874e3f7c0.png)
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() |
D.若对任意![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次