Edexcel C1 — Question 9

Exam BoardEdexcel
ModuleC1 (Core Mathematics 1)
TopicArithmetic Sequences and Series
  1. The second and fifth terms of an arithmetic series are 26 and 41 repectively.
    1. Show that the common difference of the series is 5 .
    2. Find the 12th term of the series.
    Another arithmetic series has first term -12 and common difference 7 .
    Given that the sums of the first \(n\) terms of these two series are equal,
  2. find the value of \(n\).
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