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3.3 Sequences and series (A-level only)

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Question 55

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.

a.

Find the value of the constant kkk.

[2]
b.

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

[3]

3.3 Sequences and series (A-level only) Questions

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