Question:
Mark the tick against the correct answer in the following:
$\left|\begin{array}{lll}b c & b+c & 1 \\ c a & c+a & 1 \\ a b & a+b & 1\end{array}\right|=?$
A. $(a-b)(b-c)(c-a)$
B. $-(a-b)(b-c)(c-a)$
C. $(a+b)(b+c)(c+a)$
D. None of these
Solution:
