11.
如图,点P1,P2在反比例函数y=$\frac{1}{x}$(x>0)的图象上,△P1OA1,△P2A1A2,都是等腰直角三角形,斜边OA1,A1A2在x轴上,则A1A2的长为( )
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| A. | -1+$\sqrt{2}$ | B. | 1+$\sqrt{2}$ | C. | -2+2$\sqrt{2}$ | D. | 2$\sqrt{2}$ |