Question

(esccai) Se A= {-1, 0, 2, 1} e B= {4, 2, 1, 0}, então a matriz 2A - B/2 é

Answer 1

2A= {2.-1,2.0,2.2,2.1}
2A={-2,0,4,2}

B/2={4/2,2/2,1/2,0/2}
B/2={2,1,1/2,0}

2A-B/2=
{-2,0,4,2}-{2,1,1/2,0}=
{-2-2,0-1,4-1/2,2-0}=
{-4,-1,7/2,2}