题目内容
已知![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_ST/0.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_ST/1.png)
A.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_ST/2.png)
B.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_ST/3.png)
C.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_ST/4.png)
D.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_ST/5.png)
【答案】分析:先根据解的定义将
和
代入方程y=ax+b,得到关于a,b的方程组
,解这个方程组,即可求出a和b的值.
解答:解:将
和
代入方程y=ax+b,
得
,
解得
.
故选B.
点评:本题主要考查了方程的解的定义及二元一次方程组的解法.
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_DA/0.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_DA/1.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_DA/2.png)
解答:解:将
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_DA/3.png)
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_DA/4.png)
得
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_DA/5.png)
解得
![](http://thumb.zyjl.cn/pic6/res/czsx/web/STSource/20131101185129405021864/SYS201311011851294050218002_DA/6.png)
故选B.
点评:本题主要考查了方程的解的定义及二元一次方程组的解法.
![](http://thumb.zyjl.cn/images/loading.gif)
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