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WAEC Mathematics 2018 Theory — Question 17

Question 17 of 23 from the West African Examinations Council (WAEC) Mathematics 2018 Theory paper, with the correct answer and a full explanation.

11.(a) If logₐ(y+2) = 1 + logₐx, find x in terms of y.

Model answer

logₐ(y+2) − logₐx = 1 → logₐ[(y+2)/x] = 1 → (y+2)/x = a → x = (y+2)/a.

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