Question

dados u =(1,2,0), v= (2,1,-1) e w= (0,2,3), achar = 3(u + v) -2 (2v - w)

Answer 1

$3(u+v)-2(2v-w) \\ \\ 3u+3v-4v+2w \\ \\ 3u-v+2w \\ \\ 3(1,2,0)-(2,1,-1)+2(0,2,3) \\ \\ (3,6,0)-(2,1,-1)+(0,4,6) \\ \\ (1,5,1)+(0,4,6) \\ \\ (1,9,7)$