名校
解题方法
1 . 在
中,内角
所对的边分别为
,且
.
(1)求角
;
(2)射线
绕
点旋转
交线段
于点
,且
,求
的面积的最小值.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29af2e8da863dc2b2ec210ff0272b4d6.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)射线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ff7caec4fdd8fb54a3ffbff9692414.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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5卷引用:重庆市乌江新高考协作体2024届高考模拟监测(二)数学试题
名校
解题方法
2 . 在
中,内角
的对边分别是
,且
.
(1)求
的大小;
(2)若
是
边的中点,且
,求
面积的最大值.
![](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/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03ac05e21147ef7add5940c15ba83663.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2卷引用:重庆市乌江新高考协作体2023-2024学年高二下学期第二阶段性学业质量联合调研抽测(5月)数学试题
3 . 在数学中,把只能被自己和1整除的大于1自然数叫做素数(质数).历史上研究素数在自然数中分布规律的公式有“费马数”
;还有“欧拉质数多项式”:
.但经后人研究,这两个公式也有局限性.现有一项利用素数的数据加密技术—DZB数据加密协议:将一个既约分数的分子分母分别乘以同一个素数,比如分数
的分子分母分别乘以同一个素数19,就会得到加密数据
.这个过程叫加密,逆过程叫解密.
(1)数列
中
经DZB数据加密协议加密后依次变为
.求经解密还原的数据
的数值;
(2)依据
的数值写出数列
的通项公式(不用严格证明但要检验符合).并求数列
前
项的和
;
(3)为研究“欧拉质数多项式”的性质,构造函数
是方程
的两个根
是
的导数.设
.证明:对任意的正整数
,都有
.(本小题数列
不同于第(1)(2)小题)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66fa614dd0a4ef38831d742ed3e2c883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e8e0703bc265e4b6659d5076564fcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b09c918f20cda7e931d16ba79baf0020.png)
(1)数列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c12274ae6ca7bc2d0ad2ced6a0337d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.png)
(2)依据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c14d9ae06f864498048d55088ff4e6.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/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08eb71ecf8d733b6932f4680874dbbf3.png)
(3)为研究“欧拉质数多项式”的性质,构造函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26cf2a1b49eb3f90d64d7fc526bf4c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86b92b70365c63607daecdc8deb73ecf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a6ce810257873cb94a56a93b39537d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b00e0b2cfc9260694affc6b33f59eb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6148cff72e9eabbf9912e158b52f0129.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
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2卷引用:重庆市重庆乌江新高考协作体2024届高三下学期模拟监测(三)数学试题
名校
解题方法
4 . “英才计划”最早开始于2013年,由中国科协、教育部共同组织实施,到2023年已经培养了6000多名具有创新潜质的优秀中学生,为选拔培养对象,某高校在暑假期间从中学里挑选优秀学生参加数学、物理、化学学科夏令营活动.
(1)若数学组的6名学员中恰有2人来自A中学,从这6名学员中选取2人,
表示选取的人中来自A中学的人数,求
的分布列和数学期望:
(2)在夏令营开幕式的晚会上,物理组举行了一次学科知识竞答活动,规则如下:两人一组,每一轮竞答中,每人分别答两题,若小组答对题数不小于3,则取得本轮胜利.已知甲、乙两位同学组成一组,甲、乙答对每道题的概率分别为
,且
,求在一轮答题中该小组取得胜利的概率的最大值.
(1)若数学组的6名学员中恰有2人来自A中学,从这6名学员中选取2人,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b734e8f1546481e3eb4976008a045de.png)
(2)在夏令营开幕式的晚会上,物理组举行了一次学科知识竞答活动,规则如下:两人一组,每一轮竞答中,每人分别答两题,若小组答对题数不小于3,则取得本轮胜利.已知甲、乙两位同学组成一组,甲、乙答对每道题的概率分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b3c5a4887dfe02b02ee90d740151e1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08143e9c47df0fe64d51078388839be3.png)
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解题方法
5 . 如图,在
中,
为线段
上靠近点
的三等分点,
是线段
上一点,过点
的直线与边
分别交于点
,设
,
.
,
,求
的值;
(2)若点
为线段
的中点,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4425dc7c346e4597c0521d7f636174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d3605b320cae7b4a85aa273dfb7e606.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/441809d6ce2df21a85b390cdce9b1112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4641863be921b55a26e52cfb01e7bfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52666519aa3622e65c157f072d3f8c34.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcaac97efa5492fc72fb0f773f0c4861.png)
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解题方法
6 . 某公园湖心有一浮动观景亭
,湖边一点
到观景亭
的一座桥长为
米.现公园打算升级改造,在湖边选取两个点
,
,新建两座桥梁
,
,且
.
为
中点,且
米,求两座桥梁长度之和
的值;
(2)若
,已知玻璃桥的建设成本为2千元/米,普通桥的建设成本为1千元/米,若
用玻璃桥,
用普通桥梁,不考虑其他费用支出,请你帮公园规划部计算一下,建设这两座桥梁总预算成本的最大值(单位:千元)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e4123975f257306440158659634c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fffa3d9c32da53b0ea0c338012ea20c.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/3da16fe2e1ce327bcc7a83495338e735.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c54afdd80b4bd65bf2571da9d852a5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173572e631b7f87f8673d2cd57c7b818.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
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7 . 如图1所示,在
中,点
在线段
上,满足
,
是线段
上的点,且满足
,线段
与线段
交于点
.
,求实数
的值;
(2)若
,求实数
的值;
(3)如图2,过点
的直线与边
分别交于点
,设
,
;
(ⅰ)求
的最大值;
(ⅱ)设
的面积为
,四边形
的面积为
,求
的取值范围.
![](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/0296bb542907b81fc0c0d96f916d3c2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffe1c7041b1b338246d456672db377b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0627c5fbc080e858cea342516ec0f0df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b0fffbec1fe851795dfdd448bf0d165.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40afbc01f47b02602acee4b39c1fbc91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(3)如图2,过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dec2ca6438c82b43f746057d8129885.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cb96903ddcfe069075ef87760ff6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5cd10329cdcf48bf8cc331e79790a35.png)
(ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1adebff9fb726cd58eda1ef994890901.png)
(ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a6480f384476190883f06c0289c7519.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad5a9147b25285124851a61c7d1a24a.png)
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名校
8 . 已知实数
,满足
.
(1)求证:
;
(2)求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2684b72f9f38f5046c8ecd4280b7b14b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a3ed2844068310eeaac9538f4892eca.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c2f34086050cae58a269ae77ad89466.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0e684b23522eee1c26acd2c9ce7ac5d.png)
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2024-05-03更新
|
361次组卷
|
4卷引用:重庆市乌江新高考协作体2023-2024学年高一下学期第二阶段性学业质量联合调研抽测(5月)数学试题
名校
解题方法
9 . 在非直角
中,边长a,b,c满足
.(
)
的值(用
表示)
(2)若
,
的内切圆半径为
,外接圆半径为
,求
的最小值及
的最大值.
(3)是否存在函数
,使得对于一切满足条件的
,代数式
恒为定值?若存在,请给出一个满足条件的
,并求出这个定值:若不存在,请给出一个理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e25d8e5056b7b9120d0c8f93c3494c78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8047f0a8bd0cf4e250cd0fe80093b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15917d652597d5d4bc6b3f579ef1f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfec4233214c3a729c843dee0d186db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402f1010e94be78552ed4c45548b1b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be7318e38fcc8ad1b40f448ed7b9703b.png)
(3)是否存在函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03ff333ed73251dcb17228dd87fd8cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3a44c4df73d915307d5221ea310e730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c03ff333ed73251dcb17228dd87fd8cf.png)
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解题方法
10 . 青岛胶东国际机场的显著特点之一是弯曲曲线的运用,衡量曲线弯曲程度的重要指标是曲率.考察图所示的光滑曲线
上的曲线段
,其弧长为
,当动点从A沿曲线段
运动到B点时,A点的切线
也随着转动到B点的切线
,记这两条切线之间的夹角为
(它等于
的倾斜角与
的倾斜角之差).显然,当弧长固定时,夹角越大,曲线的弯曲程度就越大;当夹角固定时,弧长越小则弯曲程度越大,因此可以定义
为曲线段
的平均曲率;显然当B越接近A,即
越小,K就越能精确刻画曲线C在点A处的弯曲程度,因此定义曲线
在点
处的曲率计算公式为
,其中
.
的圆弧的平均曲率;
(2)已知函数
,求曲线
的曲率的最大值;
(3)已知函数
,若
曲率为0时x的最小值分别为
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eefffa1689b5a68786b9a5875f12c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/505d83f4d34a8cd385577a6ce93a4b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea61ddc41f927684c6dfaacdd7f8e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0636a11a086df66133bd50e43481a546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427eceadd7bb569ff140ea73d650db1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0636a11a086df66133bd50e43481a546.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aea61ddc41f927684c6dfaacdd7f8e0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb01270362284437d082c3a2268c6b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/505d83f4d34a8cd385577a6ce93a4b11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07fa72fc4959804b944bfaa93dbe2b21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a9d0e16638396fea6bb3612a96f447.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a8f385c811ed59d13e7df7f79c39d74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7bce420cf236e5f429afee284239010.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(3)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86f9b172e8232ee105d0436dab312b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c7921ee6a8981f1f4980cdcb0f921bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce7ae90d808f05e86ea063238e4b2f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f3966bd8e4857ccb70afc0fdbab8e87.png)
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