A. find the critical values. test the values for relative maximum or relative minimum using (a) the
first derivative and (b) the second derivative test.
1. y = x2 - 8x
2. y = x2 - 10x + 15
3. y = 16x - 2x?
b. solve the following optimization problems.
1. the sum of two positive numbers is 42. find these numbers if their product is a maximum.
2. the sum of two positive numbers is 28. what are they if their product is a maximum?