OCR C2 2007 June — Question 7

Exam BoardOCR
ModuleC2 (Core Mathematics 2)
Year2007
SessionJune
TopicArithmetic Sequences and Series
7
  1. In an arithmetic progression, the first term is 12 and the sum of the first 70 terms is 12915 . Find the common difference.
  2. In a geometric progression, the second term is - 4 and the sum to infinity is 9 . Find the common ratio.
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