Mathematics

Mathematics

Problem

For −3<x≤4-3<x\le 4, find the range of g(x)=2 ⌊x2⌋−sgn(x)g(x)=2\,\bigl\lfloor \tfrac{x}{2}\bigr\rfloor-\mathrm{sgn}(x). a) {−3,−1,1,3}\{-3,-1,1,3\} b) {−3,−2,−1,0,1,3}\{-3,-2,-1,0,1,3\} c) {−3,−1,0,1,3}\{-3,-1,0,1,3\} d) {−4,−2,0,2,4}\{-4,-2,0,2,4\}

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