ECZ 2017 · GCE Paper 1 — Index Notation
Solve the equation 25ˣ = 5.
- A. x = 2
- B. x = −12
- C. x = 5
- D. x = 12
Verified working — step 1
Write both sides with base 5: 25ˣ = 5²ˣ and 5 = 5¹. So 2x = 1 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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