WAEC Further Mathematics 2022 Objective — Question 4

Question 4 of 40 from the West African Examinations Council (WAEC) Further Mathematics 2022 Objective paper, with the correct answer and a full explanation.

Simplify (9×3ⁿ⁺¹ − 3ⁿ⁺²) / (3ⁿ⁺¹ − 3ⁿ).

A. 3
B. 9Correct
C. 27
D. 81

Explanation

Factoring 3ⁿ out of numerator and denominator and simplifying the powers of 3 gives a result of 9.

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