### Higher Secondary Question Paper Solution of Year 2019 Question No: A.2.(b)(ii)

প্রমান করো যে : $\begin{vmatrix} 1+a & 1 & 1 \\[0.3em] 1 & 1+ b & 1 \\[0.3em] 1 & 1 & 1+c \end{vmatrix}$ = $abc \Bigg( \begin{matrix} 1 + {1 \over a }+{1 \over b }+{1 \over c }\end{matrix} \Bigg) (abc \neq 0)$