解不等式x+3绝对值加x-1绝对值大于等于a

问题描述:

解不等式x+3绝对值加x-1绝对值大于等于a

因为:当-3当X4;
当X>1,|x+3|+|x-1|=4+2*(X-1)>4;
故:
当a>=4时,X>=1+(a-4)/2或者X当a