已知X、Y互为相反数,且X不等于0,A、B互为倒数|N|=3.求X-AB/N-(-Y)+X/Y的值?急
问题描述:
已知X、Y互为相反数,且X不等于0,A、B互为倒数|N|=3.求X-AB/N-(-Y)+X/Y的值?急
答
X、Y互为相反数,且X不等于0X+Y=0X=-YX/Y=-1A、B互为倒数AB=1|N|=3N=±3X-AB/N-(-Y)+X/Y= X-AB/N+Y+X/Y= X+Y-AB/N+X/Y= 0 -1/N-1=-1 - 1/N当N=-3时,=-1-1/(-3) = -2/3当N=3时,=-1-1/3 = -4/3