Photos 2 DX DY

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2 dx dy. (1+У)DX=(X-1)dy. Dy/y=DX/X-1. Dy/x-1=DX/Y-2. DX/X=dy/y.
(1+У)DX=(X-1)dy. Dy/y=DX/X-1. Dy/x-1=DX/Y-2. DX/X=dy/y.

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