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# For the infinite series a1, a2... an, an = a(n-1) + n, a = 1 if n > 4

### Did you find n > 4 a trap?

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Author Message
Intern
Joined: 11 Oct 2017
Posts: 27
GMAT 1: 560 Q38 V29
For the infinite series a1, a2... an, an = a(n-1) + n, a = 1 if n > 4  [#permalink]

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15 Dec 2017, 12:14
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 100% (01:46) wrong based on 2 sessions

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For the infinite series a1, a2...... an, an = a(n-1) + n, a = 1 if n > 4, is n an odd integerer?

1) a(n-1) is even

2) a (n-4) is odd

--== Message from the GMAT Club Team ==--

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This discussion does not meet community quality standards. It has been retired.

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Math Expert
Joined: 02 Sep 2009
Posts: 52285
Re: For the infinite series a1, a2... an, an = a(n-1) + n, a = 1 if n > 4  [#permalink]

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15 Dec 2017, 12:16
1
PaterD wrote:
For the infinite series a1, a2...... an, an = a(n-1) + n, a = 1 if n > 4, is n an odd integerer?

1) a(n-1) is even

2) a (n-4) is odd

Discussed here: for-the-infinite-series-a1-a2-an-an-a-n-1-n-and-a1-1-if-n-229267.html

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________
Re: For the infinite series a1, a2... an, an = a(n-1) + n, a = 1 if n > 4 &nbs [#permalink] 15 Dec 2017, 12:16
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