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Paper 1 · Sequences and Series

What is the common difference of the salary arithmetic progression, in terms of xx?

Model answer

0.1x

Also accepted: x/10

Explanation: The salary increases each year by 10%10\% of the first year's salary xx, i.e. by 0.1x0.1x.

Derived from ZIMSEC Mathematics Paper 1, June 2011, Q12

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