What is a sequence? Define its all types through examples:
The number of persons standing in a queue forms a sequence because each of them has a particular order. That is, the first person has the first order, the second one has the second order and so on. when the objects, persons, etc. have a particular discernable order, that list of numbers, persons or objects, etc., form a sequence.
When we have the last term, it is a finite sequence: