Mathematics - Determinant Question with Solution | TestHub

If $a_1,a_2,a_3,\dots ,a_{12}$ are in A.P. and ${\Delta }_1=\left|\begin{array}{lll}{a}_1{a}_5& a_1& a_2\\ a_2{a}_6& a_2& a_3\\ a_3{a}_7& a_3& a_4\end{array}\right|$ & ${\Delta }_2=\left|\begin{array}{lll}{a}_2{a}_{10}& a_2& a_3\\ a_3{a}_{11}& a_3& a_4\\ a_4{a}_{12}& a_4& a_5\end{array}\right|$, then ${\Delta }_2-{\Delta }_1$ is