Una varilla de acero de 1.2 m de longitud t 2.46 cm² de area de su seccion transversal se suspende del techo; si soporta una masa de 400kg. En su extremo inferior, calcula su alaegamiento

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.