已知向量OM=(3-2),ON=(-5,-1),则1/2MN=_.

问题描述:

已知向量

OM
=(3-2),
ON
=(-5,-1),则
1
2
MN
=______.

1
2
MN
=
1
2
ON
-
OM
)=
(3,−2)−(−5,−1)
2
=(-4,
1
2

故答案为(-4,
1
2