Question

For \[\begin{vmatrix}1&-2\\4&3\end{vmatrix}\], what is \(A_{11}\)?

Options

• \(3\)

• \(-4\)

• \(4\)

• \(-3\)

Answer 1

Here \(M_{11}=3\) and \((-1)^{1+1}=(-1)^2=1\). Therefore, \(A_{11}=1\cdot3=3\).