{2x+1>01-2x<0}解为-1/21/2{2x+1<01-2x>0}解为空集 所以解为{x|-1/21/2}
序轴标根法不等式可化为(2x+1)(2x-1)>0得结果{x|x小于-1/2或x大于1/2}
2x+1/1-2x小于0(2x+1)(1-2x)<0(2x+1)(2x-1)>0{x|x小于-1/2或x大于1/2}