Answer: 2.
- A 1
- B 1.5
- C 2
- D 2.5
Correct answer: C. 2
Explanation: S infinity = a/(1-r) = 1/(1-1/2) = 1/(1/2) = 2. Valid when |r| < 1.
Bar heights for AP 2, 5, 8, 11 with the common difference d=3 marked between consecutive terms.
Concept context
Arithmetic progressions, geometric progressions, and sums