Find the value of

MATHEMATICS · Single correct · AoPS · Mathematics · Special Functions · Special Functions

Problem

Find the value of f(2.7)f(2.7), where f(x)=⌊x⌋+sgn⁡(x)f(x)=\lfloor x\rfloor+\operatorname{sgn}(x). (a) 44 (b) 2.72.7 (c) 33 (d) 22

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