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3.4 Sequences and Series (A-level only)

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Question 30

The first three terms of an arithmetic series are (2x−3)(2x-3)(2x−3), (5x−2)(5x-2)(5x−2) and (10x−7)(10x-7)(10x−7) respectively.

a.

Find the value of the constant xxx.

[2]
b.

Find the sum of the first 25 terms of the series.

[3]

3.4 Sequences and Series (A-level only) Questions

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