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For a finite sequence of zero numbers, the number of [#permalink]
04 Jul 2006, 03:22
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For a finite sequence of 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 consequtive terms is negative. What is the number of variations in sign for the sequence 1, -3, 2, 5, -4, -6.
if the order of sequence is : 1, -3, 2, 5, -4, -6, its 3. if the order of sequence is : -6, -4, -3, 1, 2, 5, its 1.
BTY, what is "For a finite sequence of zero numbers"?
For a finite sequence of zero numbers, the number of variations in sign is defined ..................
I think it should be "For a finite sequence of non-zero numbers.."
Answer is 3, though I interpreted in a different way and got incorrect answer
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