|x-ai|相加求最小值,x取中间那个数;
当x=50/2=25时,|x-1|+|x-2|+……+|x-50|有最小值
|x-1|+|x-2|+……+|x-50|
=x-1+x-2+……+x-25+26-x+27-x+……+50-x
=-1-2-……-25+26+27+……+50
=25×25
=625
|x-ai|相加求最小值,x取中间那个数;
当x=50/2=25时,|x-1|+|x-2|+……+|x-50|有最小值
|x-1|+|x-2|+……+|x-50|
=x-1+x-2+……+x-25+26-x+27-x+……+50-x
=-1-2-……-25+26+27+……+50
=25×25
=625