If a set is a collection of objects, then we can think of a sequence as a collection with its objects arranged in a fixed linear pattern. That means all the elements should follow a particular scheme and thus unlike in sets, these elements can’t interchange places. But, an element may occur twice depending upon the rule governing the sequence. Now, a series is nothing but the addition of all the terms of a sequence. The knowledge of these two topics comes in very handy while working with problems related to compound interest, recurring deposits etc. So, let’s get ready to learn about the two of the most popular progression series!