设 a 1 = (1 , 1 , 0) , a 2 = (0 , 1 , 1) , a 3= (3 , 4 , 0).求 a 1 - a 2及3 a 1 2 a 2- a 3.
设 a 1 = (1 , 1 , 0) , a 2 = (0 , 1 , 1) , a 3= (3 , 4 , 0).求 a 1 - a 2及3 a 1 2 a 2- a 3.
发布时间：2025-07-26 13:17:04
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答案：解:a 1- a 2=(1,1,0)-(0,1,1)=(1,0,-1),3 a 1 2 a 2- a 3=(3,3,0) (0,2,2)-(3,4,0)=(0,1,2)
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