已知a1,a2,β满足关系式1/2β-a1=a2,又a1=
(2
1
0),
a2=
(-1
3
-2),
则β=____
已知a1,a2,β满足关系式1/2β-a1=a2,又a1=
(2
1
0),
a2=
(-1
3
-2),
则β=____
【正确答案】：(2 8 -4) 解释：β=2a1+2a2 =2 (2 1 0) +2 (-1 3 -2) = ( 2 8 -4)
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