Bobosharif S. answered • 02/07/18

Mathematics/Statistics Tutor

_{x}dx+f'

_{y}dy=0, (f'

_{x}=df/dx, f'

_{y}=df/dy).

_{x}/f'

_{y}

^{3}(xy

^{2}+y) - x

^{2}sec(y + x y

^{2})

^{2}tan(y + x y

^{2})

^{2}

^{2})

^{2}tan(y + x y

^{2})

^{2}

^{2}+ cos(y(1 + x y))

^{2}cot(y (1 + x y))

^{2})/(3(1 + 2 x y)).

Atia H.

02/07/18