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600 level sequence math question

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600 level sequence math question [#permalink]

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New post 07 Aug 2017, 12:48
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The first two terms of a sequence are -3 and 2. Subsequent odd-numbered terms are given by adding 1 to the previous term, and subsequent even-numbered terms are given by multiplying the previous term by -1. What is the sum of the first 147 terms?

a.-3
b.-2
c.-1
d. 1
e. 2

Looking for the easiest way to solve this question. Thank you in advance :)
[Reveal] Spoiler: OA

Kudos [?]: 3 [0], given: 5

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Joined: 02 Sep 2009
Posts: 41712

Kudos [?]: 124855 [0], given: 12079

Re: 600 level sequence math question [#permalink]

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New post 12 Aug 2017, 03:03
cgalan6 wrote:
The first two terms of a sequence are -3 and 2. Subsequent odd-numbered terms are given by adding 1 to the previous term, and subsequent even-numbered terms are given by multiplying the previous term by -1. What is the sum of the first 147 terms?

a.-3
b.-2
c.-1
d. 1
e. 2

Looking for the easiest way to solve this question. Thank you in advance :)


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Kudos [?]: 124855 [0], given: 12079

Re: 600 level sequence math question   [#permalink] 12 Aug 2017, 03:03
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