Предмет: Математика, автор: Princessdii

Дан вектор а {1; 4/3} найдите длину вектора 3а

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Автор ответа: erzhan9210

0

найдем координаты вектора 3а (3*1:3*4/3)
(3:4)
$3a= sqrt{ x^{2}+ y^{2} } = sqrt{ 3^{2} + 4^{2} } = sqrt{9+16} = sqrt{25} =5$

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