Photos X Y DX

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X y dx. Dy/DX+Y/X -XY 2. Dy/DX-2y/x+1=(x+1)^2. D2y/dx2=0. (1+Y)DX=(X-1)dy.
Dy/DX+Y/X -XY 2. Dy/DX-2y/x+1=(x+1)^2. D2y/dx2=0. (1+Y)DX=(X-1)dy.

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