Classify the Sequence as Arithmetic, Geometric, Fibonacci, or None of These

question 31

Multiple Choice

Classify the sequence as arithmetic, geometric, Fibonacci, or none of these and supply the next term. ​
1, 6, 7, 13, ...
​

• A) None and a₅ = 97
• B) Geometric and a₅ = 78
• C) Arithmetic and a₅ = 14
• D) Arithmetic and a₅ = 19
• E) Fibonacci and a₅ = 20

---

Definitions:

Systematic Desensitization

In behavior therapy, a step-by-step process of desensitizing a client to a feared object or experience; it is based on the classical-conditioning procedure of counterconditioning.

Behavior Therapy

A form of therapy that applies principles of classical and operant conditioning to help people change self-defeating or problematic behaviors.

Phobias

Intense, irrational fears of specific objects or situations.

Family Therapist

A mental health professional specializing in treating psychological, emotional, and behavioral issues by working with families and couples in intimate relationships.