Question

find the local miximum and minimum
Saddle point of the function
f(x, y) = 4xy-x^4-y^4
​

Answer 1

Answer:

When a function's slope is zero at x, and the second derivative at x is:

less than 0, it is a local maximum.

greater than 0, it is a local minimum.

equal to 0, then the test fails (there may be other ways of finding out though)

hope uh got my point