**What Is The Absolute Maximum** – If you’ve ever ridden an elevator, visited a movie theater, or spent the day at a public pool, then you’ve probably seen a sign that says “maximum capacity.”

. Therefore, the maximum capacity is the largest value that is considered safe or acceptable for a given location to hold or permit.

**Fast Read**show

## What Is The Absolute Maximum

Many important applications in calculus deal with optimization, such as profit maximization and cost minimization, and all we need to do is use the derivative to find our extrema.

### Solved 9. In Which Of The Following Are The Absolute Minimum

Therefore, by plotting the function f below for the interval [a, e], we can visually see that the highest point (absolute maximum) is when x = e and the lowest point (absolute minimum) is when x = d

But we also see that there are other “high” and “low” points in between. These extremes are considered local (relative).

It is important to note that an absolute extreme can occur in an interval or at endpoints. In contrast, Local Extrema can only be found in an open interval and never at an endpoint.

The maximum value theorem states that if f is a continuous function on the closed interval [a, b], then f will have an absolute minimum f(c) and an absolute maximum f(d) in the interval for some values c and d.) have .

## Solved] (1) (2) Thank You For Checking. Suppose F Has Absolute Minimum…

The theorem states that the critical number of the function f is the number c in the domain such that f’ (c) = 0 or f’ is undefined.

Oh, that means there is a potential maximum or minimum value when the derivative of the function is zero or undefined!

For example, suppose we want to find the global maximum and minimum values of the following function over a given interval.

This means that the absolute minimum value is -22 when x = 3 and the absolute maximum value is 26 when x = 7.

### What Is The Absolute Maximum Value Of The Function Whose Graph Is Shown Below

Okay, so together we’ll start our lesson by exploring different graphs to find both global and relative extrema. We then identify the critical numbers by examining the first derivative and then use our knowledge to find all the absolute extremes for the given interval. Figure 1. The function defined in [latex]x=0[/latex]. The function has no absolute maximum.

Let [latex]f[/latex] be a function defined on the interval [latex]I[/latex] and let [latex]cin I[/latex]. We say that [latex]f[/latex] has an absolute maximum over [latex]I[/latex] on [latex]c[/latex] if [latex]f(c)ge f(x)[/latex ] for all [latex]xin I[/latex]. We say that [latex]f[/latex] has an absolute minimum on [latex]I[/latex] on [latex]c[/latex] if [latex]f(c)le f(x)[/latex ] for all [latex]xin I[/latex]. If [latex]f[/latex] has an absolute minimum in [latex]I[/latex] in [latex]c[/latex] or in [latex]I[/latex] in [latex]c[ /latex] , we say that [latex]f[/latex] has an absolute extremum on [latex]I[/latex] in [latex]c[/latex].

For all real numbers [latex]x[/latex] we say that [latex]f[/latex] is at most [latex](−infty,infty)[/latex] for [latex]x=0 there exists an absolute. [/latex]. The absolute maximum is [latex]f(0)=1[/latex]. It occurs at [latex]x=0[/latex] as shown in Figure 2b.

A function can have both an absolute maximum and an absolute minimum, only one extreme, or none at all. Figure 2 shows several functions and different options regarding absolute extremes. However, the following theorem, called the maximum value theorem, guarantees that the continuous function [latex]f[/latex] on the closed and bounded interval [latex][a, b][/latex] both has an absolute maximum and is also absolute there minimum.

## Can Someone Explain Why The Absolute Maxes Are 0,3 And 3,0

Figure 2. Plots (a), (b), and (c) show several possible absolute extrema for functions with domain [latex](−infty,infty)[/latex]. Graphs (d), (e), and (f) show several possible absolute extrema for functions with a bounded interval.

If [latex]f[/latex] is a continuous function on the closed and bounded interval [latex][a, b][/latex], then there is a point in [latex][a, b][/latex]. where [latex]f[/latex] is the absolute maximum on [latex][a, b][/latex] and in [latex][a, b][/latex] is the point where [ latex] f[ /latex ] has an absolute minimum against [latex][a, b][/latex].

The proof of the weighted value theorem is beyond the scope of this text. This is usually demonstrated in a real analysis course. There are several key points to note about the statement of this theorem. For the extreme value theorem to hold, the function must be continuous on a closed and bounded interval. If the interval [latex]I[/latex] is open or the function has a single breakpoint, the function may not have an absolute maximum or minimum at [latex]I[/latex]. For example, consider the functions shown in Figure 2 (d), (e), and (f). These three functions are defined on bounded intervals. However, the function in graph (e) is the only one that has both an absolute maximum and an absolute minimum in its range. The extreme value theorem cannot be applied to the functions in graphs (d) and (f) because none of these functions is constant on a closed and bounded interval. Although the function in graph (d) is defined on the closed interval [latex][0, 4][/latex], the function is discrete at [latex]x=2[/latex]. The function has an absolute maximum at [latex][0, 4][/latex], but no absolute minimum. The function in graph (f) is continuous on the half-open interval [latex][0, 2)[/latex], but is not defined on [latex]x=2[/latex] and is therefore not continuous. closed, limited interval. The function has an absolute minimum at [latex][0, 2)[/latex], but no absolute minimum at [latex][0, 2)[/latex]. These two graphs illustrate why a function on a bounded interval may not have an absolute maximum and/or minimum.

Before looking at how to find absolute extrema, let’s explore the related concept of local extrema. This idea is useful for determining where absolute extremes occur.

#### Question Video: Finding The Absolute Maximum And Minimum Values Of A Cubic Function On A Closed Interval

Consider the function [latex]f[/latex] shown in Figure 3. The graph can be described as two mountains with a valley in the middle. The absolute maximum value of the function occurs at the higher peak, at [latex]x=2[/latex]. However, [latex]x=0[/latex] is also an interesting point. Although [latex]f(0)[/latex] is not the largest value of [latex]f[/latex], the value of [latex]f(0)[/latex] is greater than [latex]f(x ) is [/latex ] for all [latex]x[/latex] near 0. We say that [latex]f[/latex] has a local maximum at [latex]x=0[/latex]. Similarly, the function [latex]f[/latex] has no absolute minimum, but has a local minimum at [latex]x=1[/latex] because [latex]f(1)[/latex] is . less than [latex]f(x)[/latex] for [latex]x[/latex] close to 1.

Figure 3. This function [latex]f[/latex] has two local maxima and one local minimum. The local maximum at [latex]x=2[/latex] is also the absolute maximum.

The function [latex]f[/latex] has a local maximum at [latex]c[/latex] if there exists an open interval [latex]I[/latex] containing [latex]c[/latex] such that [ latex ]I [/latex] in the field [latex]f[/latex] and [latex]f(c)ge f(x)[/latex] for all [latex]x in I[/latex exist. ]. A function [latex]f[/latex] has a local minimum at [latex]c[/latex] if there exists an open interval [latex]I[/latex] containing [latex]c[/latex] such that [latex ]I [/latex] exists in the domain [latex]f[/latex] and [latex]f(c)le f(x)[/latex] for all [latex]x in I[/latex . ]. A function [latex]f[/latex] has a local extremum in [latex]c[/latex] if [latex]f[/latex] is a local maximum in [latex]c[/latex] or [latex]f has [ /latex] has a local minimum at [latex]c[/latex].

Note that if [latex]f[/latex] has an absolute extremum in [latex]c[/latex] and [latex]f[/latex] falls within the interval containing the defined [latex]c[/latex], then [ latex]f(c)[/latex] is also considered a local extremum. If a full extremum occurs at an endpoint of a function [latex]f[/latex], we do not consider it a local extremum, but instead call it an endpoint extremum.

#### Determine The Absolute Maximum And Absolute Minimum Of The Function Graphed Below Over The Interval (−6,5). If There Is

Given the graph of the [latex]f[/latex] function, it is sometimes easy to see where a local maximum or minimum occurs. However, this is not always easy to see because the interesting features on the graph of the function are not obvious because they occur on a very small scale. Also, we don’t need to have a functional graph. In these cases, how can we use the formula for a function to determine where these extrema occur?

As mentioned earlier, if [latex]f[/latex] has a local extremum at [latex]x=c[/latex], then [latex]c[/latex] must be a critical point of [latex] to be F [ /latex]. This fact is known as Fermat’s theorem.

Later in this module we will look at analytical methods for determining whether a function does indeed have a local extremum at a critical point. Now let’s focus on finding critical points. We will use graphical observations to determine whether a critical point is associated with a local extremum.

Find all critical points for each of the following functions. Use the graph function to determine whether the function has a local extremum at each critical point.

### Solved Find The Absolute Maximum And Minimum Values Of The

For closed captions, open the video on its original page by clicking on the Youtube logo in the lower right corner of the video screen. On YouTube, the video will start at the same starting point as this clip, but will play until the end.

You can view an excerpt from this split clip “4.3 Maxima and Minima” here (opens in a new window).

The extreme value theorem states that a continuous function on a closed and bounded interval has an absolute maximum and an absolute minimum. As shown in Figure 2, one or both of these absolute extremes can occur at the end point. However, if the absolute extremum does not occur at an endpoint, it must occur at an interior point, in which case the absolute extremum is a local extremum. Therefore, by Fermat’s theorem, the point [latex]c[/latex]

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