Hello
Sequence and series is a chapter which includes varior formulas and concepts .
Series can be of any type whose elements are related with previous and next one with a fixed element or in a fixed pattern or in a uniform pattern.
Like : 1^2 + 2^2 +3^2 + .........
1/1 + 1/2 + 1/3 + .......etc.
1;2;3;4;5;........
1;11;111;1111;11111; .........
Etc.