3. For a vector field F(x,y) = <y^2/(1+x^2) , 2yarctan(x)>, find a function f such that F(x,y) = gradient of f. Use this result to evaluate the integral C of F*dr where C is r(t) = <t^2 , 2t> on [0,1].
y2 3. For a vector field F(x,y)=1+x2it2yartansj find a function/such that F(x, y)-Vf and use this result to evaluate F.dr, where C
