則(a,b)點(diǎn)共有
(-3,-2),(-3,-1),(-3,1),(-3,2),(-3,3),
(-2,-3),(-2,-1),(-2,1),(-2,2),(-2,3),
(-1,-3),(-1,-2),(-1,1),(-1,2),(-1,3),
(1,-3),(1,-2),(1,-1),(1,2),(1,3),
(2,-3),(2,-2),(2,-1),(2,1),(3,1),
(3,-3),(3,-2),(3,-1),(3,1),(3,2),共30種情況
其中a<0,b>0,即復(fù)數(shù)z=a+bi對(duì)應(yīng)點(diǎn)在第二象限共有:
(-3,1),(-3,2),(-3,3),(-2,1),(-2,2),
(-2,3),(-1,1),(-1,2),(-1,3),共9種情況
故復(fù)數(shù)z=a+bi對(duì)應(yīng)點(diǎn)在第二象限的概率P=
9 |
30 |
3 |
10 |
故答案為:
3 |
10 |