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# For a finite sequence of nonzero numbers, the number of

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Director
Joined: 25 Oct 2006
Posts: 648
Followers: 10

Kudos [?]: 386 [0], given: 6

For a finite sequence of nonzero numbers, the number of [#permalink]

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05 Jun 2007, 14:41
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

1. For a finite sequence of nonzero numbers, the number of variations in sign is defined as the number of pairs of consecutive terms of the sequence for which the product of the two consecutive terms is negative. What is the number of variations is in sign for the sequence. 1, -3, 2, 5, -4, -6?
Manager
Joined: 18 Sep 2006
Posts: 58
Followers: 1

Kudos [?]: 2 [0], given: 0

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05 Jun 2007, 15:26
[quote="priyankur_saha@ml.com"]1. For a finite sequence of nonzero numbers, the number of variations in sign is defined as the number of pairs of consecutive terms of the sequence for which the product of the two consecutive terms is negative. What is the number of variations is in sign for the sequence. 1, -3, 2, 5, -4, -6?[/quote]

hmm...this question is not too clear, kinda weird too, but anyways, the number of sign variations are 3; like below
1*-3 = -3
-3*2 = -6
5*-4 = -20

let me know if this is totally boneheaded
CEO
Joined: 17 May 2007
Posts: 2989
Followers: 60

Kudos [?]: 533 [0], given: 210

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05 Jun 2007, 15:35
Agree with Saurster. I can only see 3.
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