Problem 3.47 Of all values of x x1; x2; . . . ; xn that satisfy

Problem 3.47 Of all values of x ¼ ðx1; x2; . . . ; xnÞ that satisfy f ðxÞ ¼ c;

find the value that optimizes (i.e., minimizes or maximizes)

gðxÞ;

where gðxÞ is a given function.