[2X+1]/3大于等于[X+5]/2 ,X大于等于7,为常数,
问题描述:
[2X+1]/3大于等于[X+5]/2 ,X大于等于7,为常数,
急.
答
(2x+1)/3>=(x+5)/2+m
4x+2>=3x+15+6m
x>=13+6m
13+6m=7
m=-1