Question
A is a third order matrix with its elements real. If the value of the square of the determinant of the matrix of co-factors of $\mathrm{A}$ is 28561 , then $|\mathrm{A}|$ equals(a) 25(b) $\pm 13$(c) 120(d) $\pm 169$
Step 1
We can write this as: \[(\det(C))^2 = 28561\] where C is the matrix of co-factors of A. Show more…
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A is a third order matrix. If the value of the square of the determinant of the matrix of co-factors of $A$ is 28561 , then $|A|$ equals (A) 25 (B) $\pm 13$ (C) 120 (D) $\pm 169$
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A is a third order matrix with its elements real. If the value of the square of the determinant of the matrix of co-factors of $\mathrm{A}$ is 28561 , then $|\mathrm{A}|$ equals (a) 25 (b) $\pm 13$ (c) 120 (d) $\pm 169$
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