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作图
例题
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投影\:\begin{pmatrix}1&2\end{pmatrix},\:\begin{pmatrix}3&-8\end{pmatrix}
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投影\:\begin{pmatrix}1&0&3\end{pmatrix},\:\begin{pmatrix}-1&4&2\end{pmatrix}
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投影\:\:(3,\:4,\:-3),\:(2,\:0,\:6)
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投影\:(2,\:4),\:(-1,\:5)
vector-projection-calculator
投影 \begin{pmatrix}1&0&3\end{pmatrix}, \begin{pmatrix}-1&4&2\end{pmatrix}
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