Chapter 12 - Section 12.2 - Arithmetic Sequences - 12.2 Exercises - Page 857: 33

$d=6$ $ a_{5}=28$ $a_{n}=4+\left( n-1\right) \times 6$ $a_{100}=598$

$d=10-4=16-10=22-16=6$ $a_{n}=a+\left( n-1\right) d\Rightarrow a_{1}=a+\left( 1-1\right) d=a=4$ $a_{n}=4+\left( n-1\right) \times 6\Rightarrow a_{5}=28;a_{100}=598$