# Evaluating Exponential Functions

## Notes!

Review f(x) = 3x + 2 What is f(2) ? f(2) = __3(2) + 2 = 6 + 2 = 8__ f(2) = 8

Evaluate the following functions at -1, 0 , 1. {for example f(-1), f(0), f(1) }

1. f(x) = 3^x .

f(-1) = 1/3

f(0) = 1

f(1) = 32. f(x) = 3^(x-1)

f(-1) = 1/9

f(0) = 1/3

f(1) = 1

3.f(x) = 3^(x+2)

f(-1) = 3

f(0) = 9

f(1) = 27

## More Examples to try!

**Example 1:**

9/8 * 2^n at n = 5

Answer: 36

**Example 2:**

5 • (1/2 )^x at x = -2

Answer: 20

**Example 3: **

3 • 2^n at n = 6

Answer: 192