Mathematics

Problem

The sum of the products of the elements of any row of a determinant

A

with the co-factors of same row is always equal to (a) 1 (b) 0 (c)

|A|

(d)

\frac{1}{2}|A|

(a) 1 (b) 0 (c)

|A|

(d)

\frac{1}{2}|A|