Question

For \[\begin{bmatrix}7&8\\9&10\\11&12\end{bmatrix}\], which statement is correct?

Options

• \[a_{21}=9\], in Row 2, Column 1.

• \[a_{21}=10\], in Row 2, Column 1.

• \[a_{21}=8\], in Row 1, Column 2.

• \[a_{21}=11\], in Row 3, Column 1.

Answer 1

In \[a_{21}\], the first subscript identifies Row 2 and the second subscript identifies Column 1. The element at Row 2, Column 1 is \[9\].