Chapter 1.1, Problem 11MC

Mathematical Connections 1-2

Connecting Mathematics to the Classroom

Al and Betty were asked to extend the sequence $2,4,8,\mathrm{...}$. Al said his answer of $2,4,8,16,32,64,\mathrm{...}$ was the correct one. Batty said Al was wrong and it should be $2,4,8,14,22,32,44,\mathrm{...}$. What do you tell these students?