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rms5520
@rms5520
October 2021
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Найти скалярное произведение 3с*(с+2d) , при c(3,2,-1) d(0,1,5). Спасибо.
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natali15medved
Verified answer
Найдем координаты c+2d=(3,2;-1+3)=(3,2;2)
3с=(9,6;-3)
3с*(с+2d)=3,2*9,6+2*(-3)=30,72-6=24,72
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Verified answer
Найдем координаты c+2d=(3,2;-1+3)=(3,2;2)3с=(9,6;-3)
3с*(с+2d)=3,2*9,6+2*(-3)=30,72-6=24,72