Chapter 8 Applications of Partial Differentiation
Price 0.11
| 0.11 Rewards Points
A function f(x, y) is said to have a maximum value at x = a, y = b if f(a, b) > f(a + h, b + k), for small and independent values of h and k, positive or negative. A function f(x, y) is said to have a minimum value at x = a, y = b if f(a, b) < f(a + h, b + k), for small and independent values of h and k, positive or negative. Thus f(x, y) has a maximum or minimum value at a point (a, b) according as ?f = f(a + h, b + k) – f(a, b) < or > 0.