Edexcel C2 2008 January — Question 2

Exam BoardEdexcel
ModuleC2 (Core Mathematics 2)
Year2008
SessionJanuary
TopicGeometric Sequences and Series
2. The fourth term of a geometric series is 10 and the seventh term of the series is 80 . For this series, find
  1. the common ratio,
  2. the first term,
  3. the sum of the first 20 terms, giving your answer to the nearest whole number.
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