Question

найдите длинну вектора r (3;-4)​

Answer 1

Ответ:

r = {3;-4}

|r| = √(3²+(-4)²) = √(9+16) = √25 = 5

Answer 2

$|r | = \sqrt{{3}^{2} + {( - 4)}^{2} } = \sqrt{9 + 16} = \sqrt{25} = 5$