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zabrodinns
@zabrodinns
July 2022
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Найдите координаты и длину вектора m=0,5a+3b, если a(-2;-4) и b(2;-1).
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dimanchyck2000
0,5а = (0,5*(-2); 0,5*(-4)) = (-1; -2)
3b = (3 * 2; 3 * (-1)) = (6; -3)
0,5a + 3b = (-1 + 6; -2 +(-3)) = (5; -5)
|a| = √(x² + y²) = √5² + (-5)² = √50 = 5√2
Ответ: (5; -5), 5√2
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Answers & Comments
3b = (3 * 2; 3 * (-1)) = (6; -3)
0,5a + 3b = (-1 + 6; -2 +(-3)) = (5; -5)
|a| = √(x² + y²) = √5² + (-5)² = √50 = 5√2
Ответ: (5; -5), 5√2