12xagxx31的精選

問題詳情：已知函式f(x)=|2x-1|+|2x+a|,g(x)=x+3.(1)當a=-2時,求不等式f(x)<g(x)的解集;(2)設a>-1時,且當x∈[-,)時,f(x)≤g(x),求a的取值範圍.【回答】解:(1)當a=-2時,不等式f(x)<g(x)化為|2x-1|+|2x-2|-x-3<0.設函式y...