Respostas

2014-02-03T03:46:04-02:00
5*[2,3,4]=[10,15,20]
A+B=[2,3,4]+[-3,2,1]=[2+(-3),3+2,4+1]=[-1,5,5]
A-B=[2,3,4]-[-3,2,1]=[2-(-3),3-2,4-1]=[5,1,3]