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1 . 下列计算,不正确的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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2 . 从海南省可再生能源协会2020年会上获悉,截至4月底,今年我省风电、光伏及生物质能的新能源发电量为772000000千瓦时.数据772000000可用科学记数法表示为( )
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 某公司今年1月份推出新新产品
,其成本价为492元/件,经试销调查,销售量与销售价的关系如下表:
由此可知,销售量
(件)与销售价
(元/件)可近似看作一次函数
的关系.(通常取表中相距较远的两组数据所得的一次函数较为精确)试问:销售价定为多少时,1月份利润最大?求最大利润和此时的销售量.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
销售价 | 650 | 662 | 720 | 800 |
销售量 | 350 | 333 | 281 | 200 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
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4 . 命题“已知
,若
,则
是偶数”中,“
是偶数”是“
”的________ 条件;“
”是“
是偶数”的________ 条件.(用“充分”“必要”填空)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f02d5c8eec434a3f90348d770a2e2b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09479f91a41d0db4c0ec40e8c350ffdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09479f91a41d0db4c0ec40e8c350ffdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09479f91a41d0db4c0ec40e8c350ffdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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5 . 如图,已知抛物线与
轴交于
,
两点,与
轴交于点
,对称轴
与
轴交于点
,点
在
轴上,且
.
是该抛物线上的动点,连结
,
,
与
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/87e5d39f-3833-4d29-9905-c283944a9aca.png?resizew=174)
(1)求该抛物线的函数表达式;
(2)设点
的横坐标为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
.
①求
的面积的最大值;
②在对称轴
上找一点
,使四边形
是平行四边形,求点
的坐标;
③抛物线上存在点
,使得
是以
为直角边的直角三角形,求点
的坐标,并判断此时
的形状.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a18a7caa080988802ba1145b4fe4203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55d12701014cf53071093e8739d089b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c052d7af2f98d95bac8725b608fba0fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/007ea6a65d194b83745a7f880255a92e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/87e5d39f-3833-4d29-9905-c283944a9aca.png?resizew=174)
(1)求该抛物线的函数表达式;
(2)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/873a8b7c278c368aeb3c823305e8bc4d.png)
①求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0db05afb249755c12f51ca4b715b54d.png)
②在对称轴
![](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/3277eb5c174e229a90d93a02e4e0342f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
③抛物线上存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f1c4ed7451103f0cbf14bb9ae219b43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0db05afb249755c12f51ca4b715b54d.png)
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6 . 某校开展校园艺术节系列活动,派小明到文体超市购买若干个文具袋作为奖品.这种文具袋标价每个10元,请认真阅读结账时老板与小明的对话:
![](https://img.xkw.com/dksih/QBM/2021/11/26/2859726255529984/2861239226834944/STEM/a714a79ce25d4062824152a3944d9dcd.png?resizew=403)
(1)结合两人的对话内容,求小明原计划购买文具袋多少个?
(2)学校决定,再次购买钢笔和签字笔共50支作为补充奖品,两次购买奖品总支出不超过400元.其中钢笔标价每支8元,签字笔标价每支6元,经过沟通,这次老板给予8折优惠,那么小明最多可购买钢笔多少支?
![](https://img.xkw.com/dksih/QBM/2021/11/26/2859726255529984/2861239226834944/STEM/a714a79ce25d4062824152a3944d9dcd.png?resizew=403)
(1)结合两人的对话内容,求小明原计划购买文具袋多少个?
(2)学校决定,再次购买钢笔和签字笔共50支作为补充奖品,两次购买奖品总支出不超过400元.其中钢笔标价每支8元,签字笔标价每支6元,经过沟通,这次老板给予8折优惠,那么小明最多可购买钢笔多少支?
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7 . 已知幂函数
,其中
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d76ad3a9e0ea5f4ef66b50d06f647615.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/606aa29c4036a4089ac4e243190fcaac.png)
A.![]() | B.![]() ![]() |
C.若![]() ![]() ![]() | D.若![]() ![]() |
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2021-11-22更新
|
905次组卷
|
7卷引用:海南华侨中学2022-2023学年高一上学期第二次阶段考数学试题
8 . 已知
,函数
,则以下结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d217c7b12e12e5fb67472452518859ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb227e237f8da73d9e20adde7e9529dc.png)
A.![]() ![]() | B.![]() ![]() |
C.![]() ![]() | D.![]() ![]() |
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解题方法
9 . 已知偶函数
的定义域为R,且当
时,
,当
时,
,则以下结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3606fd3966dc72e0f8a32047945a86e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6c0b687073fb0c37abf63d9470ec48d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/752455799e49f846e2601304fec5d3b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dbe4c477c1a785a7fb1b41aeb10c575.png)
A.![]() | B.任意![]() |
C.![]() | D.![]() ![]() |
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|
1795次组卷
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3卷引用:海南省2022届高三10月联考数学试题
海南省2022届高三10月联考数学试题(已下线)专题06 函数的概念与性质常考压轴题型-2021-2022学年高一《新题速递·数学》(人教A版2019)重庆市重庆外国语学校(四川外国语大学附属外国语学校)2021-2022学年高二下学期期末模拟(3)数学试题
10 . 若
,则下列结论一定正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba81ba5500e27a1f726dc1400dead3a7.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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