Question

Найдите длину вектора KP, если K(-5;5;2)и P(-5;-7;-3)

Answer 1

KP = (-5 - (-5), -7 - 5, -3 - 2) = (0; -12; -5)
|KP| =
$\sqrt{ {0}^{2} + {( - 12)}^{2} + {( - 5)}^{2} } = \sqrt{0 + 144 + 25} = \sqrt{169} = 13$