Minimization
In mathematics, traditional optimization problems are typically expressed in terms of minimization. When we talk about minimizing or maximizing a function, we refer to the maximum and minimum possible values of that function. This can be expressed in terms of global or local range. The definition of minimization in the thesaurus is the process of reducing something to a small amount, value, or position. Minimization (noun) is an instance of belittling or disparagement.
Maxima and Minima
The extreme points of a function are the maximum and the minimum points of the function. A maximum is attained when the function takes the maximum value and a minimum is attained when the function takes the minimum value.
Derivatives
A derivative means a change. Geometrically it can be represented as a line with some steepness. Imagine climbing a mountain which is very steep and 500 meters high. Is it easier to climb? Definitely not! Suppose walking on the road for 500 meters. Which one would be easier? Walking on the road would be much easier than climbing a mountain.
Concavity
In calculus, concavity is a descriptor of mathematics that tells about the shape of the graph. It is the parameter that helps to estimate the maximum and minimum value of any of the functions and the concave nature using the graphical method. We use the first derivative test and second derivative test to understand the concave behavior of the function.
![IK Is posibde f a funcetio to satiy f >0f()>0, and
rw)<0on an iervd? Explain
imum?
16. Sketch a graps of a function dhat changes feoem concave wp to con-
cave down as increases. Describe bow the seceond derivative of
this function changes
17. Give a function that does not have an inflection poind at a point
where f"(x) -0.
2.
18. Suppose f is continuous on an interval containing a critical point
e and f"(e) 0. How do you determine whether f has a local
extreme value at e
Practice Exercises
che graph of the derivative of a continu-
h the origin, Sketch a possible graph
19-44. Increasing and decreasing functions Find the intervals on
which f is increasing and the intervals on which it is decreasing.
19. f(x) = 4 x
20. f(x) - x-16
8.
y-f'(x)
21. f(x) = (x – 1)²
22. f(x) = + 4x
x3
23. f(x) = 3 2
5x2
+ 4x
24. f(x)
3
2
25. f(x) = 12 + x- x2
26. f(x) = x- 4x+
15x
x4
+ x3
4.
28. f(x) = 2x -
4
27. f(x) =
x²
t is continuous on (-∞, ∞)
rign graph to summarize infor-
29. f(x) = x² In x2 + 1
30. f(x)
31. f(x) = -2 cos x
x on [0, 27]
n (2, 5); f'(x) < o
32. f(x) = V2 sin x – x on [0, 2]
33. f(x)
= 3 cos 3x on [-7, "]
-00, –1); f'(x) < 0
34. f(x) = cos² x on [-7, "]
35. f(x) = x2/3(x² - 4)
1) = 0; f(x) > 0 on
36. f(x) = x²V9 – x² on (-3, 3)
O on (-, 0)
37. f(x) = V9 - x² + sin'(x/3)
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