JAMB Mathematics 2019 Objective — Question 5

Question 5 of 40 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2019 Objective paper, with the correct answer and a full explanation.

Find the value of the determinant |0 3 2; 1 7 8; 0 5 4|

A. 12
B. 10
C. -1
D. -2Correct

Explanation

Expanding along the first column: 0×(7×4−8×5) − 1×(3×4−2×5) + 0×(3×8−2×7) = 0 − 1×(12−10) + 0 = −2.

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