问题
填空题
已知
|
答案
设
=λ,则a+2b-3c 2
a+2b-3c=2λ,
b-2c+3a=3λ,
c+3a+2b=4λ,
解得a=
λ,b=9 11
λ,c=8 11
λ,λ≠0,令μ=1 11
λ,1 11
则
=a-2b+3c a+3b-2c
=-(9-16+3)μ (9+24-2)μ
.4 31
故答案为:-
.4 31
已知
|
设
=λ,则a+2b-3c 2
a+2b-3c=2λ,
b-2c+3a=3λ,
c+3a+2b=4λ,
解得a=
λ,b=9 11
λ,c=8 11
λ,λ≠0,令μ=1 11
λ,1 11
则
=a-2b+3c a+3b-2c
=-(9-16+3)μ (9+24-2)μ
.4 31
故答案为:-
.4 31