using properties of determinants prove that :-2 *determinant[ (a b c) , (a' b' c') , (a" b" c")]=
determinant [(a+b b+c c+a) , (a'+b' b'+c' c'+a'),(a"+b" b"+c" c"+a")].
using properties of determinants prove that :-2 *determinant[ (a b c) , (a' b' c') , (a" b" c")]=
determinant [(a+b b+c c+a) , (a'+b' b'+c' c'+a'),(a"+b" b"+c" c"+a")].