OCR MEI C2 — Question 4

Exam BoardOCR MEI
ModuleC2 (Core Mathematics 2)
TopicArithmetic Sequences and Series
4 The first 3 terms of an arithmetical progression are 7, 5.9 and 4.8.
Find
  1. the common difference,
  2. the smallest value of \(n\) for which the sum to \(n\) terms is negative.
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