Functions Search Results

How To: Solve operations on rational functions (f o g)(x)

YAYMATH In order to use rational functions in intermediate algebra, Robert Ahdoot begins by setting values to the functions f(x) and g(x). He then adds these functions together, with the equation (f+g)(x). After addition comes subtraction, using the equation (f-g)(x). And finally multiplication, which is (ftimesg)(x). This is a little more complicated, requiring distribution of a binomial across a polynomial, but it's clearly demonstrated and explained. This video explains what to do with add...

How To: Solve problems with inverse functions

In this video the instructor teaches about inverse functions. Normally in inverse functions problems you are given a function that has a set of points and you are asked to find the inverse of that function. So if the function has a point in the form (x, y) then the inverse function has its points in the form of (y, x). Now when you are given a function f(x) that is in the form of x and asked to find its inverse, equate the function to y. Solve the equation to get the value of variable x in th...

How To: Use the QUOTIENT and MOD functions in Microsoft Excel

Microsoft Office Excel 2007 spreadsheet manager is a powerful tool that enables information workers to format spreadsheets, as well as analyze and share information to make more informed decisions. In this MS Excel video tutorial, you'll learn about the QUOTIENT and MOD functions. Note that, in urder to use these functions, you'll need to install the analysis ToolPak. For more information, watch this Excel how-to.

How To: Use database functions in Microsoft Excel 1997-2003

Are you looking for a way to make your Microsoft Excel formulas simpler, faster and more efficient? If so, you're in the right place. With this free video lesson from everyone's favorite digital spreadsheet guru, YouTube's ExcelsFun, the 3rd installment in his "Excel Formula Efficiency" series, you'll see how the Excel 2003, 2002, 2001, 1997 Database D functions (DSUM, DAVERAGE, DCOUNT) are much faster than SUMPRODUCT and SUM array formulas.

How To: Evaluate combinations of functions from graphs

YouTube user NotesCollegeAlgebra teaches you how to evaluate combinations of functions from graphs. You start off with a graph and some functions. (f+g)(-3), (g/f)(0) and (fg)(-6). You start looking at the graph and the first line and you get (f+g)(-3)=f(-3)+g(-3)=3+1=4. (g/f)(0)=g(0)/f(0)=2/-3=-2/3. (fg)(-6)=f(-6)g(-6)=(-3). But then when you want to find out g(-6) you realize -6 is not in g's domain. So the answer to the last equation is that it doesn't exist.

How To: Evaluate functions on a calculator TI-89

In this how-to video the person gives a detailed evaluation of the functions of the ti-89 calculator. The video is a short but informative look at the Ti-89 calculator. During the video the person shows a difficult math problem and shows how to use the Ti-89 calculator to solve that problem. The video uses some of the functions on the calculator and shows a display of where the buttons are located on the calculator. It also shows how to properly use the calculator to solve the problem while w...

How To: Find the x & y intercepts of rational functions

In this tutorial the instructor shows how to find the x and y intercepts of rational functions. Finding the intercepts of a rational function is similar to finding the intercepts of other normal equations. You can find the x intercept of the equation by setting the value of y to zero and solving the equation. Similarly you can solve the y intercept by setting the value of x to zero and solving the equation. Now while solving this rational function for intercepts if you face a situation where ...

How To: Call .NET functions from JavaScript code in a Silverlight application

In this clip, you'll learn how to call .NET functions from JavaScript when working in Silverlight. Whether you're new to Microsoft's popular web application framework or a seasoned web developer merely looking to improve your chops, you're sure to find benefit in this free MS Silverlight programming lesson. For more information, including a complete demonstration and detailed, step-by-step instructions, take a look.

How To: Make calculations with math functions when coding in PHP

In this clip, you'll learn how to make basic calculations with arithmetical functions when coding in PHP. Whether you're new to the PHP: Hypertext Preprocessor scripting language or are a seasoned web developer merely looking to improve your chops, you're sure to find benefit in this free video programming lesson. For more information, including detailed, step-by-step instructions, take a look.

How To: Use date and time functions in Microsoft Access 2007 queries

Looking for a quick guide on how to utilize date & time functions in your Access queries? You're in luck. Whether you're new to Microsoft's popular data management application or a seasoned MS Office professional just looking to better acquaint yourself with the Access 2007 workflow, you're sure to be well served by this video tutorial. For more information, including step-by-step instructions, watch this free video guide.

How To: Use inverse functions in trigonometry

Inverse trig functions are used to find missing angles rather than missing sides. This video explains how to use inverse trig to find a missing angle. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).

How To: Use Excel's built-in SUM, MOD, LCM & PRODUCT functions

As you might guess, one of the domains in which Microsoft Excel really excels is business math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, the 5th installment in his "Excel Business Math" series of free video lessons, you'll learn how to use Excel's built-in SUM, AVERAGE, PRODUCT, LCM, QUOTIENT and MOD functions.

How To: Use date and time functions in Ruby

New to the Ruby programming language or simply looking to brush up on your skills? In this installation from his Rubyology series of Ruby tutorials, YouTube user cmatthieu demonstrates some of the cool time functions supported by the Ruby programming language. Make time for and with this how-to.

How To: Find slant (oblique) asymptotes of rational functions

In this educational video the instructor shows how to find the slant asymptotes of rational functions. Slant or oblique asymptotes occur when the degree of the numerator is exactly one greater than the degree of the denominator of the rational function. The way to find the equation of the slant asymptote from the function is through long division. In this long division you divide the numerator with the denominator by following the long division method as shown in this video. Before dividing i...

How To: Use the copy and paste functions on a Mac or PC

In this video 2 people show you copy and paste functions on a Mac and a PC. On the PC, the girl copies a paragraph of text on a web page by highlighting it, right clicking, and selecting copy. Then she opens up a TextEdit program and pastes it into there and saves it. On a Mac, just like the PC, he highlights the paragraph, but this time he drags the highlighted portion right to the desktop. This will automatically create a file right on your desktop. If you open it up, it will open up in a t...

How To: Evaluate functions

In this tutorial, we learn how to evaluate functions. A function is an equation with an input and an output. For the value of "X" there is going to be a value for the rest of the values that are in the equation. To start, write out the equation, then substitute the "x" with the appropriate number. After this, substitute the "x" in the rest of the equation where it belongs. Once finished, work out the rest of the equation in the appropriate order. Now you will be able to finish it and get the ...

How To: Use the main menu functions in Photoshop CS3

In this tutorial, we learn how to use the main menu functions in Photoshop CS3. All of your main menus are up on the top toolbar. There will be a drop down list for each different tab you select. When you create a new document, you will be prompted with a dialogue box that asks you how you want your page to be set up. Change the preferences to fit how you want your page to look. When you have changed all of your different settings, click on "ok" and you will be brought to your new document cr...

How To: Use startDrag and stopDrag functions in ActionScript 2

Add interactivity to your Flash files with this basic tutorial on start/stopDrag functions in ActionScript 2.0. This function allows the user to manually move objects with their mouse clicks. Whether you're new to Adobe's popular Flash-development platform or a seasoned web developer looking to better acquaint yourself with Flash CS3, you're sure to benefit from this free software tutorial. For more information, and to get started using startDrag and stopDrag in your own projects, watch this ...

How To: Use the RANK and PERCENTRANK functions in MS Excel

If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 38th installment in his "Excel Statistics" series of free video lessons, you'll learn how to use the RANK and PERCENTRANK functions as well as the Data Analysis add-in's Rank & Percentile tools.

How To: Antidifferentiate functions with radicals in calculus

This video demonstrates how to do anti-differentiate functions with radicals in calculus. To simply problems, try to substitute. For example, in the problem, the integral of x times the square root of x plus 2 dx. You can substitute w for everything underneath the radical: i.e. x + 2. When you simplify, it becomes: the integral of x times the square root of w dw. Now, you need to get rid of the x, which you can do with a substitution: w – 2 = x. Now, plug in the values and simplify it.

How To: Graph linear functions by finding X & Y Intercept

This video shows the method to graph a linear function by finding the X and Y intercept. Only two points are needed to graph linear functions. So we find the point on Y axis or the Y intercept and the point on the X axis or the X intercept. We notice that on the Y axis the X coordinate is zero. So, we find the Y intercept by putting x=0 in the given equation and solving for y. In the same way, we find the X intercept by putting y=0 in the given equation and solve for x. We join the two points...

How To: Use Excel formulas & functions

In this installment of the Excel Basics Series you'll learn how to use formulas to calculate an annual interest rate, as well as breaking it down to a monthly rate and an effective annual rate. A general knowledge of Excel is helpful for navigating the menus in Excel, but if you pay attention during this presentation you'll pick up the skills quickly! Several ideas covered in this video are Formulas with cell references, how to find various Excel functions to use in formulas, and the Effect f...

How To: Find the horizontal asymptotes of rational functions

Finding horizontal asymptotes is very easy! Not all rational functions have horizontal asymptotes. the function must satisfy one of two conditions dependent upon the degree (highest exponent) of the numerator and denominator. If the degree of the numerator is equal to the degree of the denominator, then the horizontal asymptote is y= the ratio of the leading coefficients. If the degree of the denominator is greater than the degree of the numerator then y= 0. If the degree of the denominator i...

How To: Implode and explode when using array functions when coding in PHP

In this clip, you'll learn how to implode, explode, splice and slice when coding in PHP. Whether you're new to the PHP: Hypertext Preprocessor scripting language or are a seasoned web developer merely looking to improve your chops, you're sure to find benefit in this free video programming lesson. For more information, including detailed, step-by-step instructions, take a look.

How To: Find the asymptotes of rational functions

Looking for instructions on how to find the vertical and horizontal asymptotes of a rational function? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).