
23.(I)当x≥1时,f(x)=4x-1,即4x-1≥3x 1,解得x≥2
当-1/2<x<1时,f(x)=3,即3≥3x 1,解得-1/2<x≤2/3
当x≤-1/2时,f(x)=1-4x,即1-4x≥3x 1,解得x≤-1/2
综上(-∞,2/3)u(2, ∞)
作者:网络 来源: 2022-05-03 10:44:39 阅读:次
23.(I)当x≥1时,f(x)=4x-1,即4x-1≥3x 1,解得x≥2 当-1/2<x<1时,f(x)=3,即3≥3x 1,解得-1/2<x≤2/3 当x≤-1/2时,f(x)=1-4x,即1-4x≥3x 1,解得x≤-1/2 综上(-∞,2/3
23.(I)当x≥1时,f(x)=4x-1,即4x-1≥3x 1,解得x≥2
当-1/2<x<1时,f(x)=3,即3≥3x 1,解得-1/2<x≤2/3
当x≤-1/2时,f(x)=1-4x,即1-4x≥3x 1,解得x≤-1/2
综上(-∞,2/3)u(2, ∞)