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jess20
@jess20
July 2022
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СРОЧНО!
дано векторы а(4;-2;-4) и b(6;-3;2). найдите |2а-b|
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yablochkovanina
Даны векторы a=4, -2 ,-4 b= 6,-3, 2
Вычисляем (a-b)^2
а-b=(6-4;-3-(-2);2-(-4))=(2;-1;6)
(a-b)^2=( а-b) ( а-b)=2*2+(-1)*(-1)+6*6=4+1+36=41
Ответ: |2a-b|
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Answers & Comments
Вычисляем (a-b)^2
а-b=(6-4;-3-(-2);2-(-4))=(2;-1;6)
(a-b)^2=( а-b) ( а-b)=2*2+(-1)*(-1)+6*6=4+1+36=41
Ответ: |2a-b|