Hodges Love
05/25/2023 · Senior High School
В координатном пространстве заданы векторы \( \vec{a}(-1 ; 2 ; 0) \) и \( \vec{b}(0,1 ;-2) \). айдите: а) координаты суммы \( (\vec{p}=\vec{a}+\vec{b}) \) і \( (\vec{q}=\vec{a}-\vec{b}) \) разности этих векторов; б) одули векторов \( \vec{a}, \vec{b}, \vec{p} \) и \( \vec{q} ; \) в) скалярное пронзведение \( \alpha \) векторов \( \vec{a} \) п \( \vec{b} ; \) г) угол \( \varphi \) ежду векторами \( \vec{a} \) і \( \vec{b} \).
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- а) Координаты суммы \( \vec{p} = (-1, 3, -2) \) и разности \( \vec{q} = (-1, 1, 2) \)
- б) Модули: \( |\vec{a}| = \sqrt{5}, |\vec{b}| = \sqrt{5}, |\vec{p}| = \sqrt{14}, |\vec{q}| = \sqrt{6} \)
- в) Скалярное произведение \( \alpha = 2 \)
- г) Угол \( \varphi = \arccos\left(\frac{2}{5}\right) \)
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