Suppose you could double the mass of a planet but keep its volume the same. How would the acceleration of gravity, g, at the surface change

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.

1 a

2 b

3 b

4 d

5 d

6 d

explanation: