问题
选择题
一个均匀的立方体骰子六个面上标有数1,2,3,4,5,6,若以连续掷两次骰子得到的数m和n作为点P的坐标,则点P落在反比例函数y=
( )
|
答案
列表如下:
1 | 2 | 3 | 4 | 5 | 6 | |
1 | (1,1) | (2,1) | (3,1) | (4,1) | (5,1) | (6,1) |
2 | (1,2) | (2,2) | (3,2) | (4,2) | (5,2) | (6,2) |
3 | (1,3) | (2,3) | (3,3) | (4,3) | (5,3) | (6,3) |
4 | (1,4) | (2,4) | (3,4) | (4,4) | (5,4) | (6,4) |
5 | (1,5) | (2,5) | (3,5) | (4,5) | (5,5) | (6,5) |
6 | (1,6) | (2,6) | (3,6) | (4,6) | (5,6) | (6,6) |
6 |
x |
则P=
=14 36
.7 18
故选D.