Question

What is the first step to find the minor \(M_{ij}\)?

Options

• Multiply \(C_{ij}=(-1)^{i+j}M_{ij}\).

• Compute the sign factor \((-1)^{i+j}\).

• Select the element \(a_{ij}\) whose minor you want.

• Expand the determinant along column \(j\).

Answer 1

Finding a minor begins by selecting the specific element \(a_{ij}\). Its row and column determine which entries must be deleted.