Choose the description to match the correct matrix. diagonal form

Question

Choose the description to match the correct matrix.

diagonal form

A  

B

C

D

E

Answer 1

A diagonal matrix has zeros for all entries that are not on the diagonal.

The diagonal consists of entries where the column index value and the row index value are equal.

So, B is the only choice that fits this description, with the exception of the augmented part (the last column) being nonzero.