Find the sum of an infinite geometric series with first term 10 and common ratio 0.5.
A15
B20
C25
D30
Explanation
S_inf = a / (1 – r) = 10 / (1 – 0.5) = 10 / 0.5 = 20.
Exam Relevance
- Topic: Sequences, Probability & Statistics
- Subtopic: Infinite Geometric Series
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