Function Notation

This weekend I am going to teach you all how to work function notation problems. These problems are worked by using algebra. There are some notes that you need to know before I show you all an example of a function notation problem.

Notes:
• (f + g) (x)  This means that you have to add the f (x) equation and the g (x) equation.
• (f – g) (x)  This means that you have to subtract the f (x) equation and the g (x) equation.
• (f * g) (x)  This means that you have to multiply the f (x) equation and the g (x) equation.
• (f/g) (x)  This means that you have to divide the f (x) equation and the g (x) equation.
• (f o g) (x)  This means that you replace the x’s in the f equation with the g equation.
• If there is a number instead of an x, just plug that number into the equation.

Example: f (x) = x + 3 g (x) = x – 2
Find (f + g) (x)
• (x + 3) + (x – 2)
• x + 3 + x – 2
• 2x + 1

-Braxton