### Wolfram|Alpha Widgets: "Max/Min Finder" - Free Mathematics Widget

Answer to: Find the maximum and minimum values of the function f(x) = (ln x)/(x) on the interval [1, 3]. By signing up, you'll get thousands of. MathQuiz: on-line quizzes written using LaTeX (and TeX4ht). You want to find the relative maximum and minimum values of the function graphed. Click on the points that appear to be maximum or minimum values and.

So for a continuous function, when the derivative changes from positive to negative, the derivative is going to go through zero.

### Using Differentiation to Find Maximum and Minimum Values - Video & Lesson Transcript | odintsov.info

At this global maximum value, the derivative will be zero at that point exactly. Similarly, here, for this local maximum value, the derivative will be zero at the very top.

Super C, at the very top of his trajectory, was not going up, and he was not going down. His height as a function of time, that derivative, was zero right there. The function and graph for the launch of Super C Finding Extrema We can use this to our advantage to find extreme values.

## Find the maximum and minimum values of the function f(x) = (ln x)/(x) on the interval [1, 3].

That is, where the derivative is equal to zero. So we are going to find some x values where the derivative is equal to zero. The second step is that we are going to find what y is at those critical points. We are also going to find y at the end points. So we might realize that Super C reached the pinnacle of his height 1 second into his flight, but now we are going to find exactly how high that was - that's the y value in this case.

The third step is that we are going to compare all of those y values that we just calculated, and we are going to see which one is the maximum value that corresponds to our global maximum.

**Maximum And Minimum Value Of Algebraic Functions Part-5 By Abhinay Sharma (Abhinay Maths)**

We will also see which one is our minimum value that is going to correspond to our global minimum value. All of the other critical points might be local maxima or minima, but not always. So let's put some numbers on this. Let's look at Super C, the human cannonball.

So I'm going to differentiate our f x. Now I'm going to set that equal to zero, and solve for x. I'm going to plug 1 into our original equation here.

It's important that it's the original equation and not the derivative. To find that maximum profit and solve problems similar to this one, we need to be familiar with maximum and minimum points of a function.

A maximum point of a function is the highest point on the graph of a function, or the point that takes on the largest y-value. The minimum point of a function is the lowest point on the graph of a function, or the point that takes on the smallest y-value. Now take a look at the graph below. Local and Global Maxima and Minima As you can see from the position of the lines on the graph, we have a maximum point and a minimum point, but also points referred to as ''global'' and ''local.

The maximum or minimum point of the whole function is called the global maximum or global minimum, respectively. Looking back at our profit example, since we want to maximize profit, we want to find the global maximum of the function.

What do you notice about where the function has a maximum or minimum? Do you see how the graph flattens out at these points?

If not, you should see it now that it's been pointed out, and that's great since this is the key to finding the maxima and minima of a function using derivatives.

The derivative of a function tells us the slope of the function at any given point. Since the graph flattens out at the maximum and minimum points, let's think about what the slope of the function would be at these points. The slope of the function would be 0, since the slope of a flat line is 0.