Mathematics Grade 12 Unit 1: Sequences and Series 21. If a, b, and c are consecutive terms of a geometric progression, then b² is equal to: A. a + c B. a - c C. ac D. a/c Answer: C Explanation: In a geometric progression, the ratio between consecutive terms is…
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Mathematics Grade 12 Unit 1: Sequences and Series 11. Which of the following expresses the series 3 + 5 + 7 + 9 + 11 correctly using sigma notation? A. ∑ (n=1 to 5) of (2n - 1) B. ∑ (n=1 to 5) of (n + 2) C. ∑ (n=1 to 5) of (2n + 1) D. ∑ (n=1 to 5) of (2n + 3)…
Mathematics Grade 12 Unit 1: Sequences and Series 1. What are the first four terms of the sequence defined by the formula aₙ = (-1)ⁿ⁺¹ / n? A. 1, -1/2, 1/3, -1/4 B. -1, 1/2, -1/3, 1/4 C. 1, 1/2, 1/3, 1/4 D. -1, -1/2, -1/3, -1/4 Answer: A Explanation: Substitut…
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