问题
解答题
已知x+
|
答案
由x+
=y+1 y
=z+1 z
可得:x-y=1 x
-1 z
,zy=1 y
,y-z x-y
同理,zx=
,xy=x-z y-z
,y-x x-z
∴x2y2z2=
×y-z x-y
×x-z y-z
=1.y-x x-z
故结论得证.
已知x+
|
由x+
=y+1 y
=z+1 z
可得:x-y=1 x
-1 z
,zy=1 y
,y-z x-y
同理,zx=
,xy=x-z y-z
,y-x x-z
∴x2y2z2=
×y-z x-y
×x-z y-z
=1.y-x x-z
故结论得证.