A man roller skates up a hill at 12.5 m/s but slows down, comes to a stop and then accelerates back down the hill until he is going 13.7 m/s the other direction. Assuming the acceleration is constant and this take 18.3 s, what is the man's displacement?

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.

option number c is the right answer.