Question

Khanacademy Unit:Sequences
What does g(2)=?

Answer 1

g(2) = -42

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

Algebra II

• Sequences

Explanation:

Step 1: Define

Identify

`\displaystyle \left \{ {{g(1) = 50} \atop {g(n) = 8 - g(n - 1)}} \right.`

Step 2: Evaluate

1. Substitute in x [Function g(n)]: g(2) = 8 - g(2 - 1)
2. (Parenthesis) Subtract: g(2) = 8 - g(1)
3. Substitute in function value: g(2) = 8 - 50
4. Subtract: g(2) = -42