下表中是一次函数的自变量x与函数y的部分对应值.
(1)求一次函数的表达式并求m的值.
(2)画出函数图象,结合图象思考:若y>0,则x的取值范围是 .(直接写出结论)
x | ﹣2 | 0 | 1 |
y | 1 | m | 4 |
(1)求一次函数的表达式并求m的值.
(2)画出函数图象,结合图象思考:若y>0,则x的取值范围是 .(直接写出结论)
![](https://img.xkw.com/dksih/QBM/2016/3/23/1574186592870400/1574186599292928/STEM/40bdf08ad59148c3ba147d4e309e9f47.png)
更新时间:2016-12-06 11:53:44
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【推荐1】如图,一次函数y1=ax+b与反比例函数y2=
的图象相交于A(2,8),B(8,2)两点,连接AO,BO,延长AO交反比例函数图象于点C.
(2)当y1<y2,时,直接写出自变量x的取值范围为______;
(3)点P是x轴上一点,当S△PAC=
S△AOB时,请直接写出点P的坐标为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abb3a62e46296c417261156b51ec6b4.png)
(2)当y1<y2,时,直接写出自变量x的取值范围为______;
(3)点P是x轴上一点,当S△PAC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
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【推荐2】如图,在平面直角坐标系中,抛物线
与x轴交于A、B两点(点A在点B的左侧),与y轴交于C,点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/cd7f2a57-82b5-4922-8718-4129d832c7ae.png?resizew=145)
(1)求抛物线的表达式;
(2)若点P在抛物线上,且在线段
的上方,
的面积为3,求点P的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58d88bbd34102b55fa928e8ff83f0d52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4137799d0091e16b281b0bfc36a3b915.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/cd7f2a57-82b5-4922-8718-4129d832c7ae.png?resizew=145)
(1)求抛物线的表达式;
(2)若点P在抛物线上,且在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/357265c532428e886a643e8e653eec9e.png)
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【推荐1】如图,
中,
,
,
,动点
、
分别以每秒
个单位长度、
个单位长度的速度同时从
出发,点
沿折线
→
→
方向运动,点
沿折线
→
→
方向运动,点
到达点
后,点
的运动速度变为每秒
个单位长度运动,同时点
的运动速度变为每秒
个单位长度运动,当两点相遇时停止运动,设运动时间为
秒,点
、
的距离为
.
关于
的函数表达式并注明自变量
的取值范围;
(2)在给定的平面直角坐标系中画出这个函数的图象,并写出该函数的一条性质;
(3)结合函数图象,直接写出
、
两点相距
个单位长度时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
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(2)在给定的平面直角坐标系中画出这个函数的图象,并写出该函数的一条性质;
(3)结合函数图象,直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d91e07104b699c4012be2d26160976a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
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【推荐2】某蔬菜基地有甲、乙两个用于灌溉的水池,他们的最大容量均为
,原有水量分别为
、
,现向甲、乙同时注水,直至两水池均注满为止,已知每分钟向甲、乙的注水量之和恒定为
,若其中某一水池注满,则停止向该水池注水,改为向另一水池单独注水,设注水第
时,甲、乙水池的水量分别为
、
.
(1)若每分钟向甲注水
,分别写出
、
与
之间的函数表达式;
(2)若每分钟向甲注水
,画出
与
之间的函数图像;
(3)若每分钟向甲注水
,则甲比乙提前
注满,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c7ef5d4fbb9b34a731eda5aa211362c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59f186e939c437d10dffdda01f09c7.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/079b26850d2935ccd306d377e7e2818b.png)
(1)若每分钟向甲注水
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2151644ac073deca9019f037051fa43.png)
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(2)若每分钟向甲注水
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(3)若每分钟向甲注水
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6308e112643838717d10bfd556cd8eb4.png)
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