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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 10: cho tam giác abc xác định điểm D sao cho 3DB-2DC=0

Toán Lớp 10: cho tam giác abc xác định điểm D sao cho 3DB-2DC=0

Comments ( 1 )

  1. – Ta có : $3\overrightarrow{DB}-2\overrightarrow{DC}=\overrightarrow {0}$
              ⇒ $3\overrightarrow{DC}=2\overrightarrow{DC}$
              ⇒ $\overrightarrow{DC}=\frac{2}{3}\overrightarrow{DC}$
    $\sqrt[∆]{I}\frac{{Love^{∞}}}{π_{Math}}$

    toan-lop-10-cho-tam-giac-abc-ac-dinh-diem-d-sao-cho-3db-2dc-0

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222-9+11+12:2*14+14 = ? ( )