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1 Pure Mathematics

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Question 628

The first three terms of an arithmetic series are

(k+3)(k + 3)(k+3), (2k+4)(2k + 4)(2k+4) and (4k−2)(4k - 2)(4k−2)

respectively, where k k\,k is a constant.

a.

Find the value of kkk.

[2]
b.

Find the sum of the first 20 terms of the series.

[3]
Markscheme

1 Pure Mathematics Questions

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