若√x-√y与√x+√y互为倒数,则( ) A.x=y-1.B.x=y+1 C.x=1-y.D.x=若√x-√y与√x+√y互为倒数,则( )A.x=y-1.B.x=y+1C.x=1-y.D.x=-y-1

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若√x-√y与√x+√y互为倒数,则( ) A.x=y-1.B.x=y+1 C.x=1-y.D.x=若√x-√y与√x+√y互为倒数,则( )A.x=y-1.B.x=y+1C.x=1-y.D.x=-y-1

若√x-√y与√x+√y互为倒数,则( ) A.x=y-1.B.x=y+1 C.x=1-y.D.x=若√x-√y与√x+√y互为倒数,则( )A.x=y-1.B.x=y+1C.x=1-y.D.x=-y-1
若√x-√y与√x+√y互为倒数,则( ) A.x=y-1.B.x=y+1 C.x=1-y.D.x=
若√x-√y与√x+√y互为倒数,则( )
A.x=y-1.B.x=y+1
C.x=1-y.D.x=-y-1

若√x-√y与√x+√y互为倒数,则( ) A.x=y-1.B.x=y+1 C.x=1-y.D.x=若√x-√y与√x+√y互为倒数,则( )A.x=y-1.B.x=y+1C.x=1-y.D.x=-y-1
选B.x=y+1
若√x-√y与√x+√y互为倒数,则
(√x-√y((√x+√y)=1
x-y=1