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1.6.15 Standard formulae for geometric series (A-level only)

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Question 4

The second term of a geometric series is 100 and the fifth term of the series is 12.5.

a.

Find the common ratio.

[2]
b.

Find the first term of the series.

[2]
c.

Find the sum of the first 8 terms, giving your answer to the nearest whole number.

[2]

1.6.15 Standard formulae for geometric series (A-level only) Questions

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