robertpeterpan958 robertpeterpan958

06-01-2023
Mathematics

contestada

Cho tam giác ABC.Gọi M là điểm thuộc cạnh AB sao cho MB=2MA, I là trung điểm BC và N là trung điểm của AI. Biết vectơ MN = vectơ AB.a+vectơ AC.b. Tính S=a+b

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