Math topic中文Notationsuse of notations: (xy)\begin{pmatrix} x \\ y \end{pmatrix}(xy), AB→\overrightarrow{AB}AB, a\mathbf{a}a, ∣AB→∣|\overrightarrow{AB}|∣AB∣ and ∣a∣|\mathbf{a}|∣a∣Practice questionsNo public questions for this topic yet.