已知x-1的绝对值与y-2的绝对值互为相反数,计算1/xy+1/(x+1)(y+1)+1/(x+2)(y+2)+
问题描述:
已知x-1的绝对值与y-2的绝对值互为相反数,计算1/xy+1/(x+1)(y+1)+1/(x+2)(y+2)+
答
x=1 y=1代入就好了
已知x-1的绝对值与y-2的绝对值互为相反数,计算1/xy+1/(x+1)(y+1)+1/(x+2)(y+2)+
x=1 y=1代入就好了