(本小题每小题4分,共8分)
(1)解不等式组
;
(2)若
与
互为相反数,求
的值.
(1)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b15e53f21e6f7bae5471dae7a0419e3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa8d2a2c47a7bf36b770c256ca203245.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18934973e96e77a3fbf6923fa514c539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b88584cf1df43e28d03592c7998b1653.png)
更新时间:2020-08-06 18:35:08
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适中
(0.65)
【推荐2】如图,在平面直角坐标系中,点A,B的坐标分别为
,
,其中a,b满足方程组
现同时将点A,B向上平移2个单位长度,再向右平移1个单位长度,分别得到点C,D,连接AC,BD,CD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/7b14423b-4243-441d-a3cd-fe629c8f2801.png?resizew=195)
(1)求点C,D的坐标和四边形ABDC的面积;
(2)在坐标轴上是否存在点P,使
?若存在,求点P的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f97daba8ba8a767c63e261a9de8405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4d4f120b4be85cd566a1386f830a65d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4152ae54e40fb98ccb9c996394b28108.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/3/7b14423b-4243-441d-a3cd-fe629c8f2801.png?resizew=195)
(1)求点C,D的坐标和四边形ABDC的面积;
(2)在坐标轴上是否存在点P,使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64241d3f66817f889f9a783ad00a3048.png)
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