阅读:若
为正实数,对于某一函数图象上任意两点
、
,若
恒成立,则称这个函数为王氏函数,
为王氏系数.
(1)分别判断
和![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
是不是王氏函数;
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
是王氏函数,求
的取值范围;
(3)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c904567c3b3734e1eca8d042ef7a7b2d.png)
是王氏函数,且
的最大值为27,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec391f08f1452fb3e0aebe7e12ba4fb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3a4422395ca20fe847419ec569e48b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cc3983c5643c4754ba5d0b349c282ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
(1)分别判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a026fe55f6e9fe8ebefa239d56d9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab03556c333ab0b55fe86c937b2a5763.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8376d98446074c4d99d0a44d7987d35.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c904567c3b3734e1eca8d042ef7a7b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d78d82ae2390ee115e4ceaf52fc5e1ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/595044a7750ab4f84519041979c3d780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
22-23九年级上·湖南怀化·期中 查看更多[3]
湖南省溆浦县第一中学2022-2023学年九年级上学期期中考试数学试题(已下线)专题21.7 反比例函数的图象与性质(二)【十大题型】-2023-2024学年九年级数学上册举一反三系列(沪科版)(已下线)专题6.2 反比例函数的图象与性质(二)【十大题型】-2023-2024学年九年级数学上册举一反三系列(北师大版)
更新时间:2022-12-18 15:58:15
|
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解答题-问答题
|
困难
(0.15)
名校
【推荐1】将平面直角坐标系的纵轴绕原点顺时针旋转
得到斜坐标系.如图1,在斜坐标系
中,对于该平面内的任意一点
,过点
分别作
轴,
轴的平行线,与两轴交点所对应的数分别为
与
,则称有序数对
为点
的坐标.对于任意两点
,
和常数
,定义
为点
与
的“
度量”.
中,已知点
,
,回答下列问题:
(1)点
与点
的“
度量”为____________;
(2)已知点
,过点
作平行于
轴的直线
.
当
时,直接写出直线
上与点
的“
度量”为2的点的坐标;
若直线
上存在与点
的“
度量”为2的点,直接写出
的取值范围;
(3)已知点
,
,若线段
上存在点
,在线段
上存在点
,使得
,直接写出
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.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/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b5e761af39bc1725915c3c9ee7febee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a0ded0fad43047a44e584c1aae7955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26d0502a0d9c3490dcd1bcb1eab53da3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d17816617696dc58a42cacaa454e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217489d4e75f3e0ba6118e0b206bf40b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c93e3391890fc877c761121b68cb927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/131ebfee8d3fd5d0c4d3b20012e232f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c3de2343026200ecc235ae8438955b3.png)
(1)点
![](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/1cc9f5cc286a77dd5de1d7a638550900.png)
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86750e1b6d5e25b48e5351b42f14259f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e768f6d07a30c490a1011a8256548bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc9f5cc286a77dd5de1d7a638550900.png)
若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cc9f5cc286a77dd5de1d7a638550900.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/715385ab590dd185e39a0c7c8a3a94f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b982322bc8125cfd5b75ce0773dacc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5c0cd03ea846333312d1fde4bd917fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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解答题-问答题
|
困难
(0.15)
名校
【推荐1】在平面直角坐标系中,若直线
与函数G的图像有且只有一个交点P.则称该直线l是函数G关于点P的“联络直线”,点P称为“联络点”.
(1)直线
是函数
的“联络直线”吗?请说明理由;
(2)已知函数
,求该函数关于“联络点”
的“联络直线”的解析式;
(3)若关于x的函数
图像与x轴交于A、B两点,与y轴交于点C,点P是y轴上一点,分别过点P作函数
关于点M,N的“联络直线”PM、PN.若直线
恰好经过M、N两点,请用含a的式子表示线段PC的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe6adf29eda2e0737ce81988fce9d751.png)
(1)直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ec89d17a1b8f7961e2f1f27c2d50685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f42b2a9736c8943106472a7398d2892.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3080b9d9aaace24823a0fd8eb469e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad42625f296d2a4b65180e2f7b776beb.png)
(3)若关于x的函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c1403747b4f41e686ab4bd6d964da52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/526bb5b206810f46a51d960f58510779.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/231896d2386c924306fce5ccf9f9e8a7.png)
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解答题-问答题
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困难
(0.15)
【推荐2】如图1,平面直角坐标系中,直线
与
轴、
轴分别交于点
,
,矩形
的顶点
在反比例函数
的图像上.
(1)则反比例函数的表达式为________.
(2)如图2,点
是直线
上的一个动点,过点
作
轴的平行线,与直线
及反比例函数
的图像分别交于点
,
.设点
的纵坐标为
.
①若点
在线段
上运动,则线段
的长为________(用含
的式子表示);
②若点
在直线
上运动,求
时线段
的长;
(3)在(2)的条件下,当点
在直线
上运动时,试探究是否存在某一时刻,使以
,
,
为顶点的三角形与以
,
,
为顶点的三角形全等?若存在,直接写出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8a98e24892abc0eb34d5216d4e89c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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![](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/be9040cff7e9e20dd2817ad9888237d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/7/06168b2d-6426-41c1-97de-d4716448de2a.png?resizew=605)
(1)则反比例函数的表达式为________.
(2)如图2,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07854693dd2e33f66030d6106eb6e0ee.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
②若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73de7500e95120ca26f0e579bf80032c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
(3)在(2)的条件下,当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
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