ECZ 2017 · GCE Paper 2 · Question 1 — Matrices
Question from ECZ 2017 · GCE Paper 2 · Question 1
(a) Given that matrix K = 10-211-2, find
(a(i)) the determinant of K,[2]
Verified working — step 1
K = 10-211-2.(a(ii)) the inverse of K.[2]
Verified working — step 1
With K = 10-211-2 and det K = 2.(b) Solve the equation 3z2 = 7z - 1, giving your answers correct to 2 decimal places.[5]
Verified working — step 1
Rearrange to standard form: 3z2 - 7z + 1 = 0, so a = 3, b = -7, c = 1.The full step-by-step working and final answer are included with Premium — checked against ECZ marking standards.
Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.
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