Ok so i got a mathematica assignment that asks "Find and classify the critical points of [tex]f(x,y)= 5-10xy-4x^2+3y-y^4[/tex](adsbygoogle = window.adsbygoogle || []).push({});

What does this mean lol. The assignment was from 3 weeks ago and i just had spring break so my brain is completely outa wack. Does this mean classify the points as concave up and down or what? This is calculus III by the way. If someone can just lol, tell me what im being asked that would be great.

In the exercise before it we found fxx and fyy and fxy of a similar equation and then we found fxx*fyy - (fxy)^2. Im so lost lol. What is this partial derivative thing. Whats the fxx partial derivative * fxy - (fxy)^2 all about? I feel so dumb, my high school calculus teacher would be so dissappointed!

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Critical points

Loading...

Similar Threads - Critical points | Date |
---|---|

I Critical points for difficult function | Mar 30, 2017 |

I Lagrange multipliers and critical points | Aug 17, 2016 |

Weird theorem on critical points for multivariable functions | Mar 8, 2013 |

Critical Points | Feb 2, 2013 |

Polynomials of odd degree can have no critical point. | Nov 23, 2012 |

**Physics Forums - The Fusion of Science and Community**