Find the cofactor of b3 in the following matrix Δ: \(= \left[ {\begin{array}{*{20}{c}} a_1&{ b_1 }&{c_1}\\ a_2&b_2&{ c_2}\\ a_3&b_3&c_3 \end{array}} \right]\)

\(\left| {\begin{array}{*{20}{c}} a_1 &c_1\\ a_2&c_2 \end{array}} \right| \)

\(-\left| {\begin{array}{*{20}{c}} a_1 &c_1\\ a_2&c_2 \end{array}} \right| \)

Find the cofactor of b3 in the following matrix Δ: \(= \left[ {\begi

1.	Find the cofactor of b3 in the following matrix Δ: \(= \left[ {\begin{array}{*{20}{c}} a_1&{ b_1 }&{c_1}\\ a_2&b_2&{ c_2}\\ a_3&b_3&c_3 \end{array}} \right]\)
A.	\(\left\| {\begin{array}{*{20}{c}} a_1 &c_1\\ a_2&c_2 \end{array}} \right\| \)
B.	- b3
C.	\(-\left\| {\begin{array}{*{20}{c}} a_1 &c_1\\ a_2&c_2 \end{array}} \right\| \)
D.	- 1
Answer» D. - 1