MathematicsMatrices and determinantsJAMB
Find the inverse of the matrix with rows (3, 1) and (5, 2).
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Answer: C. rows (2, −1) and (−5, 3)
The determinant is 6 − 5 = 1; swap the diagonal and negate the other two entries.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.