Una canoa rema hacia el este a 40km/h y el río fluye hacia el este a 15km/h. La velocidad resultante de la canoa en km/h es:

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.

mistakes are ok

magnified images possible images can be real = projected onto a screen