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Mathematics · Matrices and determinants

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.

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