Question

Дано вектори с(-1; 2) i d(0; -1). Знайдіть вектора: 1) č + 10d; 2) 5c-d; 3) 7T + 2d;4) 3č – 4ã.​

Answer 1

Ответ:

1) c + 10d = (-1; 2) + 10*(0; -1) = (-1; 2) + (0; -10) = (-1; -8)

2) 5c - d = 5*(-1; 2) - (0; -1) = (-5; 10) - (0; -1) = (-5; 11)

3) 7c + 2d = 7*(-1; 2) + 2*(0; -1) = (-7; 14) + (0; -2) = (-7; 12)

4) 3c - 4d = 3*(-1; 2) - 4*(0; -1) = (-3; 6) - (0; -4) = (-3; 10)