Photos A X B 2 C

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A x b 2 c. X B Y. &Exist; a(x,y)+b(x) ПНФ. X^2 + Y^2 = B. X=(A->B)+(C->B).
X B Y. &Exist; a(x,y)+b(x) ПНФ. X^2 + Y^2 = B. X=(A->B)+(C->B).

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