This lesson will teach you how to perform operations on functions. Basically, you can add, subtract, multiply, and divide functions. Let f and g be functions.
Addition
( f + g )(x) = f(x) + g(x)
Example
Find f + g if f(x) = 2x - 7 and g(x) = 5x + 8
(f + g)(x) = f(x) + g(x)
= 2x - 7 + 5x + 8
= 2x + 5x + - 7 + 8
= 7x + 1
Subtraction
( f - g )(x) = f(x) - g(x)
Example
Find f - g if f(x) = 3x + 9 and g(x) = 6x - 3
(f - g)(x) = f(x) - g(x)
= 3x + 9 - (6x - 3)
= 3x + 9 - 6x - - 3
= 3x + 9 - 6x + 3
= 3x - 6x + 9 + 3
= -3x + 12
May 19, 19 09:20 AM
Basic math review game - The one and only math adventure game online. Embark on a quest to solve math problems!
Basic math formulas
Algebra word problems
New math lessons
Your email is safe with us. We will only use it to inform you about new math lessons.
Recommended
Scientific Notation Quiz
Graphing Slope Quiz
Adding and Subtracting Matrices Quiz
Factoring Trinomials Quiz
Solving Absolute Value Equations Quiz
Order of Operations Quiz
Types of angles quiz
May 19, 19 09:20 AM
Basic math review game - The one and only math adventure game online. Embark on a quest to solve math problems!