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Câu hỏi: Trong không gian $Oxyz$, cho ba vectơ $\overrightarrow{a}\left( 5;7;2 \right),\overrightarrow{b}\left( 3;0;1 \right),\overrightarrow{c}\left( -6;1;-1 \right)$. Tìm tọa độ của vectơ $\overrightarrow{m}=3\overrightarrow{a}-2\overrightarrow{b}+\overrightarrow{c}$.
A. $\overrightarrow{m}\left( 3;-22;3 \right)$.
B. $\overrightarrow{m}\left( 3;22;-3 \right)$.
C. $\overrightarrow{m}\left( -3;22;-3 \right)$.
D. $\overrightarrow{m}\left( 3;22;3 \right)$.
A. $\overrightarrow{m}\left( 3;-22;3 \right)$.
B. $\overrightarrow{m}\left( 3;22;-3 \right)$.
C. $\overrightarrow{m}\left( -3;22;-3 \right)$.
D. $\overrightarrow{m}\left( 3;22;3 \right)$.
Ta có $\overrightarrow{m}=3\overrightarrow{a}-2\overrightarrow{b}+\overrightarrow{c}=\left( 3; 22; 3 \right)$.
Đáp án D.