Q15 of 127 Page 119

Let A be a square matrix of order 3 × 3, then | kA| is equal to

Let A be any 3×3 matrix

∴

Taking out k from the determinant from 1^st, 2^nd and 3^rd row

∴

∴ |kA| = k³|A|

Therefore, answer is option (C) k³|A|

Which of the following is correct

Find area of the triangle with vertices at the point given in each of the following:

(1, 0), (6, 0), (4, 3)