Can someone please explain how to solve this?​

t.                 w               e                 n                   t                 y                 c             h               a           r           a               c                 t             e             r             s        

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.

photocells convert light energy to electricity

where is the circuit diagram ?