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find-all-function-f-C-1-R-2-R-wich-verify-f-x-f-y-0-x-y-R-2-




Question Number 29031 by abdo imad last updated on 03/Feb/18
find all function f ∈C^1 (R^2 ,R) wich verify  (∂f/∂x) −(∂f/∂y)=0   ∀(x,y)∈R^2 .
findallfunctionfC1(R2,R)wichverifyfxfy=0(x,y)R2.

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