问题
填空题
已知空间三个向量
|
答案
∵
=(1,-2,-17),a
=(x,2,-4),b
=(-1,y,3)分别两两垂直,c
∴
,x-4+68=0 -1-2y-51=0 -x+2y-12=0
解得x=-64,y=-26.
故答案为:-64,-26.
已知空间三个向量
|
∵
=(1,-2,-17),a
=(x,2,-4),b
=(-1,y,3)分别两两垂直,c
∴
,x-4+68=0 -1-2y-51=0 -x+2y-12=0
解得x=-64,y=-26.
故答案为:-64,-26.