ECZ 2019 · O-Level Paper 1 — Index Notation

Solve the equation 8^x = 128.

Verified working — step 1

Write both sides as powers of the same base - 8 and 128 are both powers of 2 - then a power of a power multiplies the indices.

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Original examination question © Examinations Council of Zambia. Worked solution and commentary © G12 Titan — not to be reproduced without permission.

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