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The matrix with rows (2, 5) and (1, 3) has determinant 1. Its inverse has which rows?
A(2, 5) and (1, 3)
B(3, -5) and (-1, 2)
C(-3, 5) and (1, -2)
D(1/2, 1/5) and (1, 1/3)
Answer & Solution
Correct answer: B. (3, -5) and (-1, 2)
With determinant 1, the inverse equals the adjoint, whose rows are (3, -5) and (-1, 2).
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