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1.7.4 Arithmetic sequences and series (A-level only)

1.7.4 Arithmetic sequences and series (A-level only)

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Question 6

In an arithmetic sequence, the rrr-th term is given by ur=u1+(r−1)du_r = u_1 + (r-1)dur​=u1​+(r−1)d, where u1 u_1\,u1​ is the first term and d d\,d is the common difference.

Show that the sum of the first n n\,n terms of the corresponding arithmetic series is

Sn=n2(2u1+(n−1)d) S_n = \frac{n}{2}(2u_1 + (n-1)d) Sn​=2n​(2u1​+(n−1)d)
[4]
Markscheme

1.7.4 Arithmetic sequences and series (A-level only) Questions

  1. A Level
  2. /Maths
  3. /1.7.4 Arithmetic sequences and series (A-level only)

41 exam-style questions on AQA A Level Maths 1.7.4 Arithmetic sequences and series (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

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