1 . 设不等式组
确定的平面区域为
,在
中任取一点
满足
的概率是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecf73d958a5006d54a2643e50c0b56a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8701e0cce437edc830438b4fe6277d89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0879693615729728c0bad47a02e7cc2f.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2011·北京丰台·一模
解题方法
2 . 从如图所示的正方形
区域内任取一个点
,则点
取自阴影部分的概率为( )
![](https://img.xkw.com/dksih/QBM/2013/4/24/1571195792982016/1571195798102016/STEM/53fbf2c7ac4f45fe822c1b3ac3ca7a23.png?resizew=201)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ff7e0ef1f622120cc1b18e9d3e80ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/2013/4/24/1571195792982016/1571195798102016/STEM/53fbf2c7ac4f45fe822c1b3ac3ca7a23.png?resizew=201)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次