Consider the 3 × 3 matrix a =   0 1 k 2 k −6 2 7 4  . for what values of k is matrix a invertible? (a) k ∈ r (b) all real k except 2 and 5 (c) k ≥ 0 (d) k = 0 (e) no value of k makes a invertible

All real k except 2 and 5.

Step-by-step explanation:

For a matrix to be invertible the determinant of it should not be equal to zero.

A matrix P is invertible if |P| ≠ 0

The matrix given here is:

For the above matrix to be invertible:

Matrix is invertible for all real k except 2 and 5.

2160ft3

step-by-step explanation: