1.If Δ=∣a1b1c1a2b2c2a3b3c3∣\Delta = \begin{vmatrix} a_1 & b_1 & c_1 \\ a_2 & b_2 & c_2 \\ a_3 & b_3 & c_3 \end{vmatrix}Δ=a1a2a3b1b2b3c1c2c3 and A2,B2,C2A_2, B_2, C_2A2,B2,C2 are respectively the cofactors of a2,b2,c2a_2, b_2, c_2a2,b2,c2, then a1A2+b1B2+c1C2a_1 A_2 + b_1 B_2 + c_1 C_2a1A2+b1B2+c1C2 is equal to:a.−Δ-\Delta−Δb.000c.Δ\DeltaΔd.None of theseLogin to continueOnly logged in users canattempt or see the solution.
