已知x>2/3,化简|3x-2|+|2x+1|的值
问题描述:
已知x>2/3,化简|3x-2|+|2x+1|的值
答
因为:x>2/3
所以:
|3x-2|+|2x+1|
=3|x-2/3|+2|x+1/2|
=3(x-2/3)+2(x+1/2)
=3x-2+2x+1
=5x-1