What is the inverse of the diagonal matrix D=(3005)D = \begin{pmatrix} 3 & 0 \\ 0 & 5 \end{pmatrix}D=(3005)?
(130015)\begin{pmatrix} \frac{1}{3} & 0 \\ 0 & \frac{1}{5} \end{pmatrix}(310051)
(3005)\begin{pmatrix} 3 & 0 \\ 0 & 5 \end{pmatrix}(3005)
(150013)\begin{pmatrix} \frac{1}{5} & 0 \\ 0 & \frac{1}{3} \end{pmatrix}(510031)
(5003)\begin{pmatrix} 5 & 0 \\ 0 & 3 \end{pmatrix}(5003)