Question

what are the necessary and sufficient conditions for function f ( x, y) to have maximum or minimum values

Answer 1

For functions z = f(x, y) the graph (i.e. the surface) may have maximum points or ... A point (a, b) which is a maximum, minimum or saddle point is called a stationary point. The actual value at a stationary point is called the stationary value. What we need is a mathematical method for finding the stationary points of a function.

Answer 2

Step-by-step explanation:

. The Necessary and Sufficient condition for maximum at a point (a,b) is