練習題庫/gsat・難度 5方程式 ∣x−2∣+2∣x+1∣−∣x−4∣=5|x-2|+2|x+1|-|x-4|=5∣x−2∣+2∣x+1∣−∣x−4∣=5 的解集為何？(A){−92,94}\left\{-\frac{9}{2},\frac{9}{4}\right\}{−29,49}(B){−92,12,94,52}\left\{-\frac{9}{2},\frac{1}{2},\frac{9}{4},\frac{5}{2}\right\}{−29,21,49,25}(C)∅\varnothing∅(D){94}\left\{\frac{9}{4}\right\}{49}(E){−92,52}\left\{-\frac{9}{2},\frac{5}{2}\right\}{−29,25}登入後即可作答並查看完整詳解（每日免費 5 題）。