①{2x-1<x+1 (1)
{x+8>4x-1 (2)
由(1)得 2x-x-9
x
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
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
数学人气:464 ℃时间:2019-10-29 13:52:24
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