Answer
a) A sequence is an ordered list of numbers.
b) As n becomes large, the terms $a_{n}$ approach 8.
c) As n becomes large, the terms $a_{n}$ become large (with no limit).
Work Step by Step
a) It is the standard definition.
b) The equation says that the limit of the sequence as n approaches to infinity --> $a_{n}$ becomes 8.
c) The equation says that the limit of the sequence as n approaches to infinity --> $a_{n}$ approaches to infinity.