Choose the correct answer in Exercises 15 and 16.

Choose the correct answer in Exercises 15 and 16.

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

(A) k| A|                      (B) k² | A|                    (C) k³| A|                   (D) 3k | A |

So option C is correct

16. Which of the following is correct?

(A) Determinant is a square matrix.

(B) Determinant is a number associated to a matrix.

(C) Determinant is a number associated to a square matrix.

(D) None of these

We can calculate the determinant of a square matrix only so that Determinant is a number associated to a square matrix. Option (C) is correct.