> > (11) A = B 1. Angle between A and B is 180°, then A - B = ....
A.O
B. 2B
C.3|A|
D. 4|A|
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> > (11) A = B 1. Angle between A and B is 180°, then A - B = ....
A.O
B. 2B
C.3|A|
D. 4|A|
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