如图所示, 在平面直角坐标系
中,直线
和直线
的交点坐标为
,则二元一次方程组
的解是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac02a054bd0771a56987af33454baaea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae652daf6059ff386f99bef2210518c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c044bcf4b87cd1575198ab30c3a037.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a330c35431fceb8a56f3ee9abfc40726.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/ace55ce1-df84-4a81-a727-683b93d3cd68.png?resizew=161)
更新时间:2023-01-16 13:57:34
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【知识点】 两直线的交点与二元一次方程组的解解读
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【推荐1】如图,在平面直角坐标系
中,直线
:
和
:
相交于点A.
![](https://img.xkw.com/dksih/QBM/2023/9/9/3320997704073216/3340042704961536/STEM/5dca4ac1f5f846beaaf79fff9fb46e20.png?resizew=278)
(1)观察图象,直接写出方程组
的解_____ .
(2)若直线
:
与y轴的交点为
,则一次函数
的表达式_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b3c8be9aee074c9a3203abace248ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f06443b381a16ea4a5e39e19794a27.png)
![](https://img.xkw.com/dksih/QBM/2023/9/9/3320997704073216/3340042704961536/STEM/5dca4ac1f5f846beaaf79fff9fb46e20.png?resizew=278)
(1)观察图象,直接写出方程组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df2d061cc120b909db96bd2889021a11.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f06443b381a16ea4a5e39e19794a27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ae1b361135eaae8d172cb7aa490d6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2f06443b381a16ea4a5e39e19794a27.png)
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【推荐2】已知函数y=mx+n和y=
的图象交于点P(a,﹣2),则二元一次方程组
的解是____ .
![](https://img.xkw.com/dksih/QBM/2016/3/9/1573982305837056/1573982311800832/STEM/04a638d7e625423fbbe53ff5280e7f82.png?resizew=20)
![](https://img.xkw.com/dksih/QBM/2016/3/9/1573982305837056/1573982311800832/STEM/305a404b6b47427494dc210ca66cac40.png?resizew=60)
![](https://img.xkw.com/dksih/QBM/2016/3/9/1573982305837056/1573982311800832/STEM/02acb86be1194fc6829e91b9501c5234.png?resizew=209)
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