engineering recuitment BARC Stipendiary Trainee Category I 2023 Mock Test Mathematics Matrices

If for the matrix, \(A = \left[ {\begin{array}{*{20}{c}} 1&{ - α }\\ α &β \end{array}} \right]\), AAT = I2, then the value of α4 + β4 is: 

1
4
2
1
3
2
4
3
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