解题方法
1 . 英国著名物理学家牛顿曾研究过函数
的图象,其形恰如希腊神话中海神波塞冬的武器——三叉戟,因此
的图象又称为牛顿三叉戟曲线.
![](https://img.xkw.com/dksih/QBM/2023/1/30/3164161277140992/3165396944830464/STEM/8a6379f872ad4def83630a9f16099d23.png?resizew=198)
(1)证明:
在
上为减函数;
(2)当
时,不等式
恒成立,求实数m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cfee2c4efc91317d8e0ade4c839d863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://img.xkw.com/dksih/QBM/2023/1/30/3164161277140992/3165396944830464/STEM/8a6379f872ad4def83630a9f16099d23.png?resizew=198)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9414348d57c7fc77dcfa8f0744cb0c9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de2db972e67f3cfa05cbc69bec992839.png)
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2 . 如图,菱形
的边
上有一点
,边
上有一点
(
,
不与顶点重合)且
,若
是边长为
的等边三角形,则
的范围是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/ea200ee6-bd25-4679-842e-4b08a2832719.png?resizew=167)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/92f105c371cef563a0687dde1daeb2c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47a63cfb55b90ab27a2896357971bdd2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/ea200ee6-bd25-4679-842e-4b08a2832719.png?resizew=167)
A.![]() | B.![]() | C.![]() | D.![]() |
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名校
解题方法
3 . 某条货运线路总长2000千米,交通法规定,在该线路上货车最低限速50千米/时(含),最高限速100千米/时(含).汽油的价格是每升8元,汽车在该路段行驶时,速度为
千米/时,每小时油耗为
升.(假设汽车保持匀速行驶)
(1)求该线路行车油费
(元)关于行车速度
(千米/时)的函数关系;
(2)车速为何值时,行车油费达到最低?并求出最低的行车油费;
(3)运营该条线路的刘师傅接到某公司的货运派单,要求在24小时内送达,否则将少支付50元费用作为超时补偿.请写出此时刘师傅驾驶的最优车速.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6fb2dc85c8b2b39be8e25e7295284a.png)
(1)求该线路行车油费
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)车速为何值时,行车油费达到最低?并求出最低的行车油费;
(3)运营该条线路的刘师傅接到某公司的货运派单,要求在24小时内送达,否则将少支付50元费用作为超时补偿.请写出此时刘师傅驾驶的最优车速.
您最近一年使用:0次
解题方法
4 . 推行垃圾分类以来,某环保公司新上一种把厨余垃圾加工处理为可重新利用的化工产品的项目.经测算该公司每日处理厨余垃圾的成本
(元)与日处理量
(吨)之间的函数解析式可近似地表示为
每处理一吨厨余垃圾,可得到价值100元的化工产品的收益.
(1)求日纯收益
(元)关于日处理量
(吨)的函数解析式;(纯收益=总收益-成本)
(2)该公司每日处理的厨余垃圾为多少吨时,获得的日纯收益最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9360d7ff089fb524af6f0eded1a8a6c1.png)
(1)求日纯收益
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)该公司每日处理的厨余垃圾为多少吨时,获得的日纯收益最大?
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5 . 已知函数
(常数
).
(1)若
,在平面直角坐标系中画出该函数的图像;
(2)若该函数在区间
上是严格减函数,且在
上存在自变量,使得函数值为正,求整数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c484467a7f56746f3ece92a3df802c88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45a173784888adf2946382fa093ba53a.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5095a28bb1b91bf6bed9e2cfbd76bb18.png)
(2)若该函数在区间
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc64c9fc732c76bec3e691d7ddbbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6dc64c9fc732c76bec3e691d7ddbbefe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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解题方法
6 . 下列命题:
①
中,若
,则
;
②若
,
,
为
的三个内角,则
的最小值为
;
③已知
,则数列
中的最小项为
;
④函数
的最小值为
.
其中所有正确命题的序号是______ .
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d0b9c0c01b49be6e08a111568f77f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0b6662c6f84e1c97c9d05d9ae62c1eb.png)
②若
![](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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22b0859248973d51cd8eeafe373700a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/206f73d2f0fa051e76a60bd574c6ab3c.png)
③已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45496106b492a50c77d472d91463c888.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cf38189d5cbf627d2b82ac0eb76006.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a245373cb2db163f5ab4375431db3cad.png)
④函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea7da6fbf767f88d0f43e336957fee85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6ad68f10f098feda5d9b94636bf752.png)
其中所有正确命题的序号是
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7 . 1859年,我国清朝数学家李善兰将“function”一词译成“函数”,并给出定义:“凡此变数中函彼变数,则此为彼之函数”.下列关于函数性质的说法正确的是( )
A.若![]() ![]() |
B.若定义在![]() ![]() ![]() ![]() ![]() ![]() |
C.函数![]() ![]() ![]() ![]() ![]() ![]() ![]() |
D.对于任意的![]() ![]() ![]() |
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8 . 希罗平均数(
)是两个非负实数的一种平均,设
是两个非负实数,则它们的希罗平均数
.在直角
中,
,则
的希罗平均数的取值范围为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfcd9ff385c4ac4f7135eff667909361.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a50851d9e8c602ec75337aab59d34e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aebec30356b590a72bc2a75f9b09221.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c870ef83e4e9eb140594ffdd7f5600a.png)
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解题方法
9 . 设
,
,则
取得最大值时的x值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e599c17bdea870572fc14cc7000d0eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9aabd59a4d426490f6ae9fb6f324acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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10 . 已知曲线
在点
处的切线为
,设
,
,2,…,
,
且
.
(1)设
是方程
的一个实根,证明:
为曲线
和
的公切线;
(2)当
时,对任意的
且
,
恒成立,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6838d84b68c6f0d3b93b196d9b08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6945a1d7d30dd1b29577440dcfaac9a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a3677144defbef98e1f972147db393c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c45176df950dfe48b8ca7eac08ee349.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aadf9ab510510120699c5eee39ab18b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b752f0f189e5d8666daea73e145dff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b36bca4b0fe91679de1f468ebe4021cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ff6838d84b68c6f0d3b93b196d9b08d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12be206d66e65eb92ef08bad8cd8f71d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1591d4244dcf5539a4ae98f554e91e61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36b98ef143f8159f3a7dafa1fd2f2370.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0704f453b2de48d36911f7db496bbf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb37f9d67f549f095c671deaf116790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2021-12-26更新
|
584次组卷
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3卷引用:河南省县级示范性高中2021-2022学年高三上学期8月尖子生对抗赛数学(文科)试题