For a finite sequence of non zero numbers, the number of variations in sign is defined as the number of pairs of

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by BTGmoderatorDC » Sun May 17, 2020 5:54 pm

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For a finite sequence of non zero 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 in sign for the sequence 1, -3, 2, 5, -4, -6 ?

A. 1
B. 2
C. 3
D. 4
E. 5

OA C

Source: GMAT Prep

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Source: Beat The GMAT — Problem Solving | Sun May 17, 2020 5:54 pm

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