What are the values and types of the critical points, if any, of #f(x,z) = x^4 + 15z^2 + 2xz^2 - 456z^2#?
1 Answer
Aug 18, 2017
There is only a relative minimum at
Explanation:
We calculate the partial derivatives of the function
The critical points are when
This test is inconclusive
There is only a relative minimum at