partial derivative problem?

steve

if f(x,y) = e^(x/y) find x fsubscriptxx + fsuby in simplified form

Can't figure this one out... Thanks for any help

amar-soni

fx =e^(x/y){1/y}

fxy =e^(x/y)(-1/y^2)+e^(x/y)(-x/y^2)

= - e^(x/y){(x+1)/y^2} .......................Ans