若丨x-y+1丨与丨x+y-2013丨互为相反数,求(x+2y)/(x-y)的值
问题描述:
若丨x-y+1丨与丨x+y-2013丨互为相反数,求(x+2y)/(x-y)的值
答
∵丨x-y+1丨与丨x+y-2013丨互为相反数
∴|x-y+1|+|x+y-2013|=0
∴x-y+1=0,x+y-2013=0
∴x=1006,y=1007
∴(x+2y)/(x-y)
=(1006+2014)/(1006-1007)
=-3020