21-22九年级上·全国·课后作业
1 .
的气体装在体积为
的容器中,气体的密度为
.写出密度与体积间的关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0f36a7e7123f293b38b2a4b30a843f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b4075d38746e36a7065267f62c08695.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c92a5e99ba19132f9738fe53c8cd024b.png)
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21-22九年级上·全国·课后作业
2 . 你能举出两个反比例函数的实例吗?写出函数表达式,并与同伴交流.
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3 . 在直角坐标系中,设反比例函数y1=
(k1≠0)与正比例函数y2=k2x(k2≠0)的图象都经过点A和点B,点A的坐标为(1,2).
(1)求函数y1和函数y2的表达式;
(2)当y1>y2时,直接写出x的取值范围;
(3)若当x=m时,函数y1和y2的值分别为P1和Q1,当x=n时,函数y1和y2的值分别为P2和Q2.写出一对m和n的值,满足P1>P2且Q1<Q2,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d77e4ec542fc19c2f918dcba6b25b78.png)
(1)求函数y1和函数y2的表达式;
(2)当y1>y2时,直接写出x的取值范围;
(3)若当x=m时,函数y1和y2的值分别为P1和Q1,当x=n时,函数y1和y2的值分别为P2和Q2.写出一对m和n的值,满足P1>P2且Q1<Q2,说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/24/df6c8663-0cb6-4f06-bdee-b1c97bb288d6.png?resizew=155)
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4 . 一辆汽车前灯电路上的电压U(V)保持不变,通过灯泡的电流强度I(A)是电阻R(Ω)的反比例函数.若当电阻为30Ω时,通过灯泡的电流强度为0.40A,则当电阻为50Ω时,通过灯泡的电流强度为 _______ A.
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5 . 已知反比例函数
的图象经过
,
两点.
(1)求
的函数表达式;
(2)当
时,求
的取值范围;
(3)设一次函数
,当
时,比较
与
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5698fdca52f0b841d952897c6621a05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcab2c5c85301cf851418b1f57402d22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a64d924836b4292239d9726c6473d7f5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65d1eec645764636c0e23b05e8f93234.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
(3)设一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/671af9ae0dc6953e4ceccdd731e29987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08115d6d9f876dea921a4d32260ff1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
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2021-10-02更新
|
432次组卷
|
4卷引用: 浙江省杭州十三中教育集团2021-2022学年九年级上学期开学数学试卷
浙江省杭州十三中教育集团2021-2022学年九年级上学期开学数学试卷 浙江省杭州市拱墅区锦绣育才教育集团2020-2021学年八年级下学期期末数学试题福建省漳州第一中学2021-2022学年九年级上学期期中考试数学试题(已下线)核心考点05反比例函数-【满分全攻略】2022-2023学年八年级数学下学期核心考点+重难点讲练与测试(浙教版)
6 . 学校的学生专用智能饮水机在工作过程:先进水加满,再加热至100℃时自动停止加热,进入冷却期,水温降至25℃时自动加热,水温升至100℃又自动停止加热,进入冷却期,此为一个循环加热周期,在不重新加入水的情况下,一直如此循环工作,如图,表示从加热阶段的某一时刻开始计时,时间为
(分)与对应的水温为
(℃)函数图象关系,已知
段为线段,
段为双曲线一部分,点
为
,点
为
,点
为
.
(1)求出
段加热过程的
与
的函数关系式和
的值.
(2)若水温
(℃)在
时为不适饮水温度,在
内,在不重新加入水的情况下,不适饮水温度的持续时间为多少分?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863994d1e4c3fadb82c258183b8ccd82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bdef865b0bc68919965c836f8b6c811.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd9df9edd143705878887a09c39ff43f.png)
(1)求出
![](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/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)若水温
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f773cd499ac8fe96e824e98be0a7bed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e8a952ecd06b179a49ea28c6ffe1d7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/28/abaf7ace-d418-4e53-ae4c-440b3e0c49d4.png?resizew=370)
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2021-09-26更新
|
518次组卷
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5卷引用:浙江省温州市乐清市2020-2021学年八年级下学期期末数学试题
浙江省温州市乐清市2020-2021学年八年级下学期期末数学试题(已下线)11.3 用反比例函数解决问题河南省南阳市邓州市2021-2022学年八年级下学期期末数学试题(已下线)专题31 实际问题中的反比例函数-【微专题】2022-2023学年八年级数学下册常考点微专题提分精练(浙教版)湖南省桂阳县第三中学2023-2024学年九年级上学期数学试题
名校
7 . 如图,在直角坐标系中,点
和点
是一次函数
和反比例函数
图象的交点.
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754044575129600/2815914398801920/STEM/c71fe7a3-f79e-41a4-9c29-416c214303a2.png)
(1)求反比例函数的表达式和点
的坐标.
(2)利用图象,直接写出当
时
的取值范围.
(3)连结
并延长交双曲线于点
,连结
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1acee6e6880d4ba0ea62ff84d862261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026808536f6b6d265c778e23836fbf13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05621b18b7ffc991d9f30380e2e08fea.png)
![](https://img.xkw.com/dksih/QBM/2021/6/30/2754044575129600/2815914398801920/STEM/c71fe7a3-f79e-41a4-9c29-416c214303a2.png)
(1)求反比例函数的表达式和点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)利用图象,直接写出当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff2736f057c50aebab2a72d5209f405b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)连结
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaf1438142deeac876fc7dc50552e552.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2021-09-25更新
|
420次组卷
|
3卷引用:浙江省绍兴市新昌县2020-2021学年八年级下学期期末数学试题
名校
8 . (1)已知反比例函数的图象和正比例函数图象都经过点
,求两个函数的表达式;
(2)若
(
)的解是
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f54dd475ff1321041c80738b201c3b6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd03ee33fec28918dff6bfe4cb06646.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7215cf9e5b987d5c15cf3b70bdb03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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9 . 如图,点
的坐标为
轴,反比例函数
(
)的图象经过点
,点
在线段
上运动(不与点
重合),过点
作
轴于点
,交反比例函数图象于点
,将线段
绕点
逆时针旋转
得到线段
,连接![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fa53e8c4ffe30a3cc9e94366886ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b34cf9e8b8d6d9490dcfafd033fec91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(1)求
的值;
(2)若点
为线段
的中点,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4f653d26429945cc03104b589bb364.png)
(3)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09951b048e1433b296a6f5bb6261f256.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/672f49afbbcd84946ae7d14beabee9fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e541ea2f855f981c96207070683d388.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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d84acd3c96e20c0ce064aac125f7fe2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06ba22238cdff318a4bd9d4d746b3229.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c57b07f75e97d9f84718bd495ebcf4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fa53e8c4ffe30a3cc9e94366886ac3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b34cf9e8b8d6d9490dcfafd033fec91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4f653d26429945cc03104b589bb364.png)
(3)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09951b048e1433b296a6f5bb6261f256.png)
![](https://img.xkw.com/dksih/QBM/2021/7/2/2755489325891584/2809902208442368/STEM/ce749f99-b568-448e-babb-3caa18630b14.png?resizew=295)
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