如图,在平面直角坐标系中,一次函数y= kx +b(k≠0)的图像分别交x轴、y轴于A、B两点,与反比例函数y=
(m≠0)的图像交于C、D两点.已知点C的坐标是(6,-1),D(n,3).
(1)求m的值和点D的坐标;
(2)求线段AB的长度;
(3)根据图像直接写出: 当x为何值时,一次函数的值大于反比例函数的值?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7626c207a4dc82d4d59cb520c91e49.png)
(1)求m的值和点D的坐标;
(2)求线段AB的长度;
(3)根据图像直接写出: 当x为何值时,一次函数的值大于反比例函数的值?
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/ab1ace03-e480-49df-8309-de50fe369fd1.png?resizew=288)
更新时间:2019-01-28 20:40:35
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【推荐1】(1)如图,在四边形
中,
,点
是边
上一点,
,
,连接
、
,求证
是等腰直角三角形.
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640284152578048/2643818897891328/STEM/f0f04a55-d6b3-4092-a171-9c793284c884.png)
(2)如图,一次函数
的图像与
轴交于点
,与
轴交于点
,直线
交
轴与点
,且
,则点
的坐标为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7d8397018b0a01a1b4e9574604f9e76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cd1f3b67f266fc83774bc59ef8b90a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/024dc2ccbbe321774df5d44e8785b203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c771a4feb150ad9cff8d70431c97eb17.png)
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(2)如图,一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9427de5d22d37859a110dbb234313c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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【推荐2】如图,已知直线
,直线
,直线
,
分别交
轴于
,
两点,
,
相交于点
.
(1)求
,
,
三点坐标;
(2)求![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2566d21b3d25c7eff896134271fb37c5.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5cbff84327e964f912a54032e76ccc9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/14/d675e1e3-8611-44c5-ba33-1da2b2b4744a.png?resizew=165)
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【推荐1】设a,b是任意两个不等实数,我们规定:满足不等式a≤x≤b的实数x的所有取值的全体叫做闭区间,表示为[a,b].对于一个函数,如果它的自变量x与函数值y满足:当m≤x≤n时,有m≤y≤n,我们就称此函数是闭区间[m.n]上的“闭函数”.如函数
,当x=1时,y=3;当x=3时,y=1,即当
时,有
,所以说函数
是闭区间[1,3]上的“闭函数”.
(1)反比例函数y=
是闭区间[1,2015]上的“闭函数”吗?请判断并说明理由;
(2)若二次函数y=
是闭区间[1,2]上的“闭函数”,求k的值;
(3)若一次函数
(
)是闭区间[m,n]上的“闭函数”,求此函数的解析式(用含m,n的代数式表示).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/153c30d42516c752b5688fde68778f14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc35c5fe5078b49039918139758e371.png)
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(1)反比例函数y=
![](https://img.xkw.com/dksih/QBM/2015/6/15/1573847290937344/1573847296663552/STEM/965054dbe0504afcae512a927b689b48.png)
(2)若二次函数y=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c28b03c8d81871e052dcf266a057f45b.png)
(3)若一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f34291a09fe6b5611a4f293c1004a3e.png)
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【推荐2】如图,一次函数
与反比例函数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6898d181faf9e6cc9957f3102f8d3d73.png)
的图象相交于
,
两点.过点
作
轴,垂足为
,
(2)根据所给条件,请直接写出不等式![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eea2e2a92ffe9a404e0f063a6a74d08.png)
的解集;
(3)一次函数
的图像上是否存在一点
,使得求
.若存在,求出
点坐标,若不存在说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5324645d81b339fa25ccb2951f77e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6898d181faf9e6cc9957f3102f8d3d73.png)
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(2)根据所给条件,请直接写出不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eea2e2a92ffe9a404e0f063a6a74d08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7626c207a4dc82d4d59cb520c91e49.png)
(3)一次函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b5324645d81b339fa25ccb2951f77e5.png)
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【推荐1】已知反比例函数y=
,一次函数y=mx﹣m+1.
(1)求证:这两个函数一定有交点;
(2)我们定义:若两个函数图象的两个交点的横坐标x1、x2(x1>x2),满足2<
<3,则称这两个函数有两个“梦想交点”,如果y=
与y=mx-m+1有两个“梦想交点”,求m的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf35027e76f8ea593f82023973d4aba3.png)
(1)求证:这两个函数一定有交点;
(2)我们定义:若两个函数图象的两个交点的横坐标x1、x2(x1>x2),满足2<
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1709a9b91740b8570a2c5df36960b0.png)
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【推荐2】已知:一次函数
(k,b是常数,
)的图象经过点A(1,4)、点
.
(1)求该一次函数的表达式;
(2)已知点
、点
在该函数图象上,若
,试判断反比例函数
的图象所在的象限,并说明理由,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c15fb18163df0690365a0d2e7ee88f5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c80c26a794a844127aae7dee87c93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3db929f14e1fe2c41740a1f2552894d5.png)
(1)求该一次函数的表达式;
(2)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8198c3b302b3820e86763428eb1e91cc.png)
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【推荐1】如图,点A在第一象限,
轴,垂足为C,
,
,反比例函数的图像经过
的中点B.
(1)求k值;
(2)若直线
与反比例函数图像在第一象限有交点,求b的取值范围.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/26/9b5586cf-9237-4f04-9233-4beafeed323c.png?resizew=175)
(1)求k值;
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9bd144e0e96e4236a14523e0729cacb.png)
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【推荐2】在等腰
中,
是射线
上的动点,过点
作
(
始终在
上方),且
,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/e2c1bbe1-af84-4642-84c0-c980a492c860.png?resizew=527)
(1)如图1,当点D在线段
上时,判断
的形状,并说明理由.
(2)如图2,若D,E为线段
上的两个动点,且
,连接
,求
的长.
(3)如图3,若M为
中点,连接
,在点
的运动过程中,当
______时,
的长最小,最小值是______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c138a825d4f019e36365fae32977c1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f345b28a81ff3d2c4666ee945a426fa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22437a2a3402609bfd4054a9f2b6c685.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/e2c1bbe1-af84-4642-84c0-c980a492c860.png?resizew=527)
(1)如图1,当点D在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e64c953aaf341e772a5fe776fbc78a.png)
(2)如图2,若D,E为线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76805974fefbe166b90d260e822ab5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c09855888f39cd96c91c5cc921c2982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
(3)如图3,若M为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c978d92edf0c4c1ef8620c17df75d35e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/907d5147cea4c9ce855074864fe54506.png)
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