Find which of the following series are geometric progressions. If they are, write down the common ratio.

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a) 5 + 15 + 45 + 135 + ...

b) −60 + 30 − 15 + 7.6 − 3.8 + ...

c) 1/2 + 1/3 +1/4 + 1/5 + ...

d) 1/3 + 1/12 + 1/48 + 1/192

e) 1 − 1 + 1 − 1 + ...

f) 0.8 − 0.16 + 0.032 − 0.0064 + ...

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Complete Pure Mathematics 1 For Cambridge International AS & A Level

ISBN: 9780198427438

2nd Edition

Authors: Jean Linsky, Brian Western, James Nicholson

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Question Posted: Apr 14, 2023 10:33 AM

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Find which of the following series are geometric progressions. If they are, write down the common ratio.

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ANSWER a This is a geometric progression with a common ratio of 3 since ...View the full answer

Complete Pure Mathematics 1 For Cambridge International AS & A Level

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