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15 minute question

by goyalsau » Thu Sep 02, 2010 7:16 am
Fn = 4 + 1 - 2 + 12 + 3 - 6 + 36 + 9 - 18 ------ n terms.

If 2Fn + 3 = 816 then what is the value of n?

(1) 17
(2) 23
(3) 69
(4) 42
(5) none of these
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by niksworth » Thu Sep 02, 2010 11:03 am
Either the answer is NONE OF THE ABOVE or something is wrong with this question. What is the source?
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by Stuart@KaplanGMAT » Thu Sep 02, 2010 11:16 am
goyalsau wrote:Fn = 4 + 1 - 2 + 12 + 3 - 6 + 36 + 9 - 18 ------ n terms.

If 2Fn + 3 = 816 then what is the value of n?

(1) 17
(2) 23
(3) 69
(4) 42
(5) none of these
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