User:Egm6321.f12/sandbox

$$a = b_2^3$$



\displaystyle \begin{Bmatrix} \mathbf a \end{Bmatrix} = \begin{Bmatrix} a_1 \\ a_2 \\ \vdots \\ a_3 \end{Bmatrix} $$


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$$  \displaystyle a $$ (N)
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$$\displaystyle \frac{(5)_k(-10)_k}{(1)_k}$$