Images 2 DX DY

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2 dx dy. Sqrt(1-y^2)*DX+Y*sqrt(1-x^2)*dy=0. 2x 1 sqrt x2 y DX sqrt x 2y dy 0. Х2 dy (y-1) DX. Dy=(x^2-1)DX.
Sqrt(1-y^2)*DX+Y*sqrt(1-x^2)*dy=0. 2x 1 sqrt x2 y DX sqrt x 2y dy 0. Х2 dy (y-1) DX. Dy=(x^2-1)DX.

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