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Series: Geometric Progressions
In a geometric series starting at 8 and with common ratio
2
---
5
,
the 12th term is to 6 dps

tickcross


Worked Solution

The common ratio is
2
---
5
. We multiply each term by this value to get the next term.
The 12th term will be the first term, 8, multiplied by
2
---
5
 eleven times.
The 12th term is
8×(
2
---
5
)11 = 0.000336 to 6 dps

© MEI Produced by Dr Ron Knott, revised 15 May 2007
tom . button [AT] mei . org . uk 		Test reference: SeriesGPterms.html?ref=45077