ECZ 2020 · O-Level Paper 1 — Variation
Given y = 16∛xz², find (c) the values of z when y = 12 and x = 27.
- A. z = 2 only
- B. z = ±4
- C. z = ±16
- D. z = ±2
Verified working — step 1
12 = 16·∛27z² = 16 × 3z² = 48z², so z² = 4812= 4 and z = …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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