解不等式组 ①{2x-1<x+1 ②{3(x-3)<x-15 {x+8>4x-1 {x-1/2>7x+2/5

问题描述:

解不等式组 ①{2x-1<x+1 ②{3(x-3)<x-15 {x+8>4x-1 {x-1/2>7x+2/5

①{2x-1<x+1 (1)
{x+8>4x-1 (2)
由(1)得 2x-x-9
x