Mathematics

Problem

A_1, B_1, C_1, \dots

are respectively the co-factors of the elements

a_1, b_1, c_1, \dots

of the determinant

\Delta = \begin{vmatrix} a_1 & b_1 & c_1 \\ a_2 & b_2 & c_2 \\ a_3 & b_3 & c_3 \end{vmatrix}, \text{ then } \begin{vmatrix} B_2 & C_2 \\ B_3 & C_3 \end{vmatrix} =

(a)

a_1 \Delta

(b)

a_1 a_3 \Delta

(c)

(a_1 + b_1) \Delta

(d) None of these (a)

a_1 \Delta

(b)

a_1 a_3 \Delta

(c)

(a_1 + b_1) \Delta

(d) None of these