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April 20, 2014

April 20, 2014

Posted by **Jnr John** on Tuesday, April 16, 2013 at 11:20pm.

- Please...help me over here.,Sequence and series -
**Reiny**, Tuesday, April 16, 2013 at 11:29pmremember the terms of a geometric sequence run like this:

a ar ar^2 ar^3 ...

so we

1 , r, r^2, r^3, 81

term(5) = 81

r^4 = 81

r = ± 3

so the sequence is

1, 3, 9, 27, 81

or

1, -3, 9, -27, 81

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