Question

A=$\begin{bmatrix} \alpha & \alpha & \alpha \\\ \beta & \alpha & -\beta \\\ -\alpha & \alpha & \alpha \end{bmatrix}$B is formed by co-factor of A matrix, then find out determinant of AB.

• A. 4α3(2α+β)5
• B. 12α4(α+β)2
• C. 8α6(α+β)3
• D. 18α8(α+β)3

Answer 1

Answer: (C)

8α6(α+β)3

Answer 2

The Correct answer is option is (C) : 8α6(α+β)3