ECZ 2021 · GCE Paper 1 — Index Notation
Solve the equation 125^x = 125.
- A. 23
- B. −23
- C. −32
- D. −15
Verified working — step 1
Write both sides to base 5: 125 = 5³ and 125= 5⁻². So 53x = 5⁻², giving 3x = −2 and x = …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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