Question

dado vetor u (2,-1,1) v(1,-1,0) w (-1,2,2) qual o valor de -w*v

Answer 1

-w = (1,-2,-2)
-w*v = (1,-2,-2)*(1,-1,0) 
-w*v = [(1.1) + (-2.-1) + (-2.0)
-w*v =  (1 + 2 + 0)
-w*v = 2