Question

Sendo A=(1 5 -4 1), B= (2 -2 -3 0) e C= (1 0 -1 4) determine:

a) A.B

b) A.A

Answer 1

A.B = ( 1 5 -4 1).(2 -2 -3 0) = (2 -10 12 0)

A.A = (1 5 -4 1).(1 5 -4 1) = (1 25 16 1)