Easy
If in the determinant $\Delta = \begin{vmatrix} a_1 & b_1 & c_1 \\ a_2 & b_2 & c_2 \\ a_3 & b_3 & c_3 \end{vmatrix}$,$A_1, B_1, C_1$ etc. are the co-factors of $a_1, b_1, c_1$ etc.,then which of the following relations is incorrect?
- A$a_1 A_1 + b_1 B_1 + c_1 C_1 = \Delta$
- B$a_2 A_2 + b_2 B_2 + c_2 C_2 = \Delta$
- C$a_3 A_3 + b_3 B_3 + c_3 C_3 = \Delta$
- D$a_1 A_2 + b_1 B_2 + c_1 C_2 = \Delta$
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