Question

Дано вектори c(- 3; 1) i d(5; - 6) Знайдіть:
1) c + d
2) c - d ;
3) | с + d |
4) | d - c|

Answer 1

c + d = (-3 + 5, 1 - 6) = (2, -5)

c - d = (-3 - 5, 1 + 6) = (-8, 7)

|c + d| = sqrt((2)^2 + (-5)^2) = sqrt(4 + 25) = sqrt(29)

|d - c| = sqrt((5 - (-3))^2 + (-6 - 1)^2) = sqrt(8^2 + (-7)^2) = sqrt(113)