化简（x+y)+(2x+y/12)+(3x+y/23)+.+(9x+y/8*9)

来源：学生作业帮助网编辑：六六作业网时间：2024/11/24 00:17:36

化简（x+y)+(2x+y/1*2)+(3x+y/2*3)+.+(9x+y/8*9)化简（x+y)+(2x+y/1*2)+(3x+y/2*3)+.+(9x+y/8*9)化简（x+y)+(2x+y/1*

化简（x+y)+(2x+y/1*2)+(3x+y/2*3)+.+(9x+y/8*9)
化简（x+y)+(2x+y/1*2)+(3x+y/2*3)+.+(9x+y/8*9)

化简（x+y)+(2x+y/1*2)+(3x+y/2*3)+.+(9x+y/8*9)
（x+y)+(2x+y/1*2)+(3x+y/2*3)+.+(9x+y/8*9)
=(x+2x+3x+...+9x)+(y+y/1*2+y/2*3+...+y/8*9)
=(1+9)*9x/2 +[y+(y-y/2)+(y/2-y/3)+(y/3-y/4)+...+(y/8-y/9)]
=45x+(8/9)y