Arithmetic Sequences - Definition & Examples

$a_1, a_2, a_4, a_8$

$a_4, a_6, a_8, a_{10}$

$a_1, a_5, a_{10}$

$a_2, a_3, a_5, a_7$

$a_1,a_{10}$

$a_6, a_4, a_2$