MathematicsMatrices and determinantsJAMB
Find the inverse of [[3, 1], [5, 2]].
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Answer: D. [[2, −1], [−5, 3]]
The determinant is 6 − 5 = 1; swap the diagonal and negate the other entries.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.