For a finite sequence of nonzero numbers, the number of variations in sign is defined as the number of pairs of consecutive terms in the sequence for which the product of the 2 consecutive term is negative. What is the number of varations in sign for the sequence 1, -3, 2, 5, -4, -6?
Im really confused by the definition of consecutive term here. b/c i dont see any real consecutive terms here at all.
but if we were suppose to consider real consecutive terms: -1,0,1 etc.. there wouldnt be any negative variations...
so it must mean terms such as this from the list above:
essentially 6 comes after 5 and we just ignore then minus sign to apply the consecutive term... i prolly dont make much sense, but I think its C