7.Determine the signs of the partial derivatives for the function f whose graph is shown below.
https://www.webassign.net/scalcet/14-3-6.gif
(a) fxx(−x0, y0)
positive negative
(b) fyy(−x0, y0)
positive negative
8. Determine the signs of the partial derivatives for the function f whose graph is shown below.
https://www.webassign.net/scalcet/14-3-6.gif
(a) fx(−x0, y0)
positive negative
(b) fy(−x0, y0)
positive negative
9. Determine the signs of the partial derivatives for the function f whose graph is shown below.
https://www.webassign.net/scalcet/14-3-5.gif
(a) fx(x0, y0)
positive negative
(b) fy(x0, y0)
positive negative
10. Determine the signs of the partial derivatives for the function f whose graph is shown below.
https://www.webassign.net/scalcet/14-3-8.gif
(a) fxy(x0, y0)
positive negative
(b) fxy(−x0, y0)
positive negative