Photos 2 DX DY

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2 dx dy. (1+У)DX=(X-1)dy. DX 5y+1 dy. Dy=(x^2-1)DX если y=4 при x=1. (6x2+1) DX=dy у(1)=7.
(1+У)DX=(X-1)dy. DX 5y+1 dy. Dy=(x^2-1)DX если y=4 при x=1. (6x2+1) DX=dy у(1)=7.

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