Function Notation
Function Notation
Evaluating Functions
Example 1
Given f(x) = x2 + 2x - 1, find f(2).
Step 1. Eliminate the input value "x" and replace it with parentheses.
f() = ()2 + 2() - 1
Step 2. Place the input value of 2 inside the parentheses.
f(2) = (2)2 + 2(2) - 1
Step 3. Simplify the right side of the equation.
f(2)= 4 + 4 - 1
f( 2)= 7