Photos 2 1 DX

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2 1 dx. Dy/x-1 DX/X-2. YDY DX/2 X+1. Dy=(x^2-1)DX. 2dy/DX 1+X 2.
Dy/x-1 DX/X-2. YDY DX/2 X+1. Dy=(x^2-1)DX. 2dy/DX 1+X 2.

See also