Photos 2 DX DY

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2 dx dy. DX/dy=dy/DX. Dy/DX 2x (1-y) изоклин. Dy/DX формула. X/Y по DX/dy.
DX/dy=dy/DX. Dy/DX 2x (1-y) изоклин. Dy/DX формула. X/Y по DX/dy.

See also