Question

Определить координаты вектора m=2a-3b, если a(-2;3) и b(4;-1)

Answer 1

$overline{m}=2overline{a}-3overline{b} \ overline{m} = textless 2 cdot (-2); 2 cdot 3 textgreater - textless 3 cdot 4; 3 cdot (-1) textgreater \ overline{m} = textless -4;6 textgreater - textless 12;-3 textgreater = textless -4-12;6+3 textgreater = textless -16;9 textgreater$