Chapter 11 - Section 11.2 - Arithmetic and Geometric Sequences - Exercise Set - Page 646: 34

Arithmetic, $a_{1}=\dfrac{2}{3} \text{ and }\\ d=\dfrac{2}{3} $

The sequence $\left\{ \dfrac{2}{3},\dfrac{4}{3},2 \right\}$ is an arithmetic sequence with \begin{array}{l} a_{1}=\dfrac{2}{3} \text{ and }\\ d=\dfrac{2}{3} .\end{array}