For any matrix $A$, $(A')'$ equals:
A$-A$
B$A$
C$A^2$
D$A'$
Answer & Solution
Correct answer: B. $A$
Transposing twice returns the original matrix: (A')' = A.
Related questions
If A is a 3×3 matrix with det(A) = 5, then det(2A) isDeterminant of a 2×2 matrix [[a,b],[c,d]] equalsIf A is invertible, then A × A⁻¹ equalsA matrix with the same number of rows and columns is calledIf A is invertible 2 × 2 and A² = I then A isDeterminant of a triangular matrix equalsA square matrix A is called symmetric ifIf A and B are square matrices of same order, in general