Question

Use the function below to find f(-2).

F(x)= 3^x

A. 1/6
B. -9
C. -6
D. 1/9

Answer 1

D. 1/9

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Algebra I

• Functions
• Function Notation
• Exponential Rule [Rewrite]:
  `\displaystyle b^(-m) = (1)/(b^m)`

Explanation:

Step 1: Define

Identify

f(x) = 3ˣ

f(-2) is x = -2 for function f(x)

Step 2: Evaluate

1. Substitute in x [Function f(x)]: f(-2) = 3⁻²
2. Exponents: f(-2) = 1/9