Question

Dadas matrizes A= 2...3...4 e B= -3... 2....1, calcule:
                            - ...0...2         1...4....2
a)5A
b)A+B
c)A-B

Answer 1

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]