例如:X=1-1+1-1+1-1.....(无限)X=?X1=(1-1)+(1-1)+(1-1)+(1-1)+.... =0+0+0+0... =0X2=1-(1-1)-(1-1)-(1-1)..... =1-0-0-0-0-0.... =1X3=1-(1-1+1-1+1-1.....) =1-x =1/2X的值是0 1 还是1/2 ?这就是无限的矛盾.有空加我啊!QQ:542855453 450563752