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Y 1 c. X2 x1 2 y2 y1 2. 2x-2y/x^2-y^2. 2x+y-1=0. Y=x2.
X2 x1 2 y2 y1 2. 2x-2y/x^2-y^2. 2x+y-1=0. Y=x2.

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