ECZ 2021 · GCE Paper 1 — Index Notation
Solve the equation 125x = 125.
- A. 23
- B. −23
- C. −32
- D. −15
Verified working — step 1
Write both sides as powers of the same base - 125 and 25 are both powers of 5 - remembering that a reciprocal flips the sign of the index.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.
Have a different question?
Search it — if it is from a past paper or a school mock, chances are we have it worked out, or one that uses the same method.
Search any past-paper question