在平面直角坐标系中,一次函数y=﹣
x+b的图象与y轴交于点B(0,2),与反比例函数y=
的图象交于点A(4,﹣1).
(1)求反比例函数的表达式和一次函数表达式;
(2)如果点P是x轴上的一点,且△ABP的面积是3,求P点的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f7626c207a4dc82d4d59cb520c91e49.png)
(1)求反比例函数的表达式和一次函数表达式;
(2)如果点P是x轴上的一点,且△ABP的面积是3,求P点的坐标.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/a22b9dfd-0c9b-48ae-876e-81991e0008f9.png?resizew=153)
更新时间:2020-04-21 16:19:57
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【推荐1】如图所示,在平面直角坐标系
中,直线
:
分别与
轴、
轴交于点
,坐标原点
为线段
的中点,
正半轴上点
满足
,直线
与直线
交于点
.
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(1)求直线
的解析式;
(2)求四边形
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7795aec93c2c7ac2fd93e6747ca6516c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e52586ca2a3b783bc8092415e2d4bf6d.png)
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(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88047f00ecbeea226344279b7b3d23b5.png)
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【推荐2】某公司成功开发出一种产品,正式投产后,生产成本为5元/件.公司按订单生产该产品(销售量=产量),年销售量y(万件)与售价x(元/件)之间满足如图1所示的函数关系,公司规定产品售价不超过15元/件,受产能限制,年销售量不超过30万件;为了提高该产品竞争力,投入研发费用P万元(P万元计入成本),P与x之间的函数关系式如图2所示,当
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![](https://img.xkw.com/dksih/QBM/2022/5/26/2987629364428800/2989068585803776/STEM/ac5f1a71-309a-4116-93a3-dd25059e0024.png?resizew=407)
(1)求y与x之间的函数关系式.
(2)求这种产品年利润W(万元)与售价x(元/件)满足的函数关系式.
(3)当售价x为多少元时,年利润W最大,并求出这个最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/085f3aa2f2c346834ff49d39afae356b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1423fe82cfef5a278809393f5f6ba68.png)
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(1)求y与x之间的函数关系式.
(2)求这种产品年利润W(万元)与售价x(元/件)满足的函数关系式.
(3)当售价x为多少元时,年利润W最大,并求出这个最大值.
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【推荐1】如图,在平面直角坐标系中,一次函数
的图象与反比例函数
的图象交于第一、三象限内的A、B两点,与y轴交于点C,过点B作
轴,垂足为M,
,
,点A的纵坐标为4
(2)连接
,求四边形
的面积.
(3)直接写出关于x的不等式
的解集.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afe881163c775a56269efb4068399227.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1cdeec882d328c700c16521b56d24fbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6600714f00f5774fad7c8684847249b3.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c884b508394b3ab50734b584d9ec783c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8bfe91001402f2a12ebf9c4df0bd5a.png)
(3)直接写出关于x的不等式
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7546a63f6befa570b06a6e7664d92ac.png)
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【推荐2】如图1,在平面直角坐标系中,点
为原点,点
的坐标为
,正方形
的顶点
在
轴的负半轴上,点
在第二象限.现将正方形
绕点
顺时针旋转角
得到正方形
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/76f94d14-21c1-4ff5-bf61-99ad6e2d52b7.png?resizew=542)
(1)如图2,若
,
求直线
的函数表达式.
(2)若
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取得最小值时,求过正方形
的顶点
的反比例函数解析式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
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(1)如图2,若
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(2)若
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名校
【推荐1】如图,直线
反比例函数
)交于点
,并与x轴,y轴交于点C,B.
(2)连接
,求
的值.
(3)点D在y轴的负半轴上,以点D,C,B,若组成的三角形与
相似,求点D的坐标.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07565f10847840e0fb07b05218ad17fa.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36828be50c7405bb08ec09c64c80bd5a.png)
(2)连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739734ca1058d32edcbc02401574cbb5.png)
(3)点D在y轴的负半轴上,以点D,C,B,若组成的三角形与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/173bc7a36757d77f01213411edd25241.png)
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【推荐2】已知直线y=kx+b与x轴、y轴分别交于A、B两点,与反比例函数y=
交于一象限内的P(
,n),Q(4,m)两点,且tan∠BOP=
.
(1)求双曲线和直线AB的函数表达式;
(2)求△OPQ的面积;
(3)当kx+b>
时,请根据图象直接写出x的取值范围.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ca8b26c3ad6d892590290a2304126bd.png)
(1)求双曲线和直线AB的函数表达式;
(2)求△OPQ的面积;
(3)当kx+b>
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