Question

calcule o vetor soma (s)=(4,1,2)-7(-1,2,1)+3(0,5,7)+2(9,-3,1)

Answer 1

Segue:
S = (4, 1, 2) - 7(-1, 2, 1)+3 (0,5, 7)+ 2 (9, -3, 1) 
S = (4, 1, 2) + (7, -14, -7) + (0, 15, 21) + (18, -6, 2) 
S = ((4+7+0+18), (1-14+15-6), (2-7+21+2)) 
S = (29, -4, 18)