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Post-UTME Mathematics 2018 Objective — Question 7

Question 7 of 20 from the Post-UTME Screening (Post-UTME) Mathematics 2018 Objective paper, with the correct answer and a full explanation.

Evaluate the determinant: 3, -2 / 8, -5

A. 31
B. 1Correct
C. -1
D. -31

Explanation

det = 3x(-5) - (-2)x8 = -15+16 = 1.

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