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1.4.8 Arithmetic sequences and series (A-level only)

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Question 7

The third term of an arithmetic series is 10 and the sum of the first nine terms of the series is 153.

a.

Find the first term of the series.

[2]
b.

Find the common difference.

[2]
c.

Find the highest value of n n\,n for which the sum of the first n n\,n terms is less than 300.

[6]

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

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