If i have
$\displaystyle f(x,y) = x^3+4x^2y+4y^3 $
Then are these answers correct?
$\displaystyle f_x = 3x^2+8xy $
$\displaystyle f_y = 4x^2+12y^2 $
$\displaystyle f_{xx}=6x+8y$
$\displaystyle f_{yy}=24y$
$\displaystyle f_{xy}=8 $
If i have
$\displaystyle f(x,y) = x^3+4x^2y+4y^3 $
Then are these answers correct?
$\displaystyle f_x = 3x^2+8xy $
$\displaystyle f_y = 4x^2+12y^2 $
$\displaystyle f_{xx}=6x+8y$
$\displaystyle f_{yy}=24y$
$\displaystyle f_{xy}=8 $