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OlgaChernova2000
@OlgaChernova2000
July 2022
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1. Найти координаты векторов AB и BC, если А(5;7;2), В(5;4;6), С(9;4;9).
2. Даны векторы b {3;1; -2}, и с{1;4; -3}. Найдите |2b-c|
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Answers & Comments
almaznak
1) AB(5-5;4-7;6-2)=AB(0;-3;4)
BC(9-5;4-4;9-6)=BC(4;0;3)
2) 2b=(3*2;1*2;(-2)*2)=(6;2;-4)
2b-c=(6-1;2-4;-4-3)=(5;-2;-7)
|2b-c|=
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Answers & Comments
BC(9-5;4-4;9-6)=BC(4;0;3)
2) 2b=(3*2;1*2;(-2)*2)=(6;2;-4)
2b-c=(6-1;2-4;-4-3)=(5;-2;-7)
|2b-c|=