extproj_\mathbfc \mathbfv = rac-36 eginpmatrix 1 \ 2 \ -1 \endpmatrix = - rac12 eginpmatrix 1 \ 2 \ -1 \endpmatrix = eginpmatrix -0.5 \ -1 \ 0.5 \endpmatrix - Portal da Acústica
Mar 01, 2026
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