medium · GMAT Quant
A production line tracking parameter is given by M(k) = lfloor (k)/(2) rfloor - lfloor (k-1)/(2) rfloor for any integer k.
Which of the following expressions is equivalent to M(k) for all integers k?
- (1 + (-1)^k)/(2)
- (1 - (-1)^k)/(2)
- 1
- 0
- (-1)^k
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