 Hi and welcome to the session. I'm Kanika and I'm going to help you to solve the following question. The question says, write the first five terms of each of the sequences and exercises 11 to 13 and obtain the corresponding series. 13 part is, A1 is equal to A2 is equal to 2, An is equal to An minus 1 minus 1, when n is greater than 2. Before solving this question, we should know that if A1, A2, so on, An is the given sequence, then the expression A1 plus A2 plus An plus so on is called the series associated with the given sequence. Let's now begin with the solution. In this question, we have given the first two terms of the sequence, that is A1 is equal to 2 and A2 is also equal to 2. As we are given the first two terms of this sequence, so we have to only find the next three terms by using the relation An is equal to An minus 1 minus 1, when n is greater than 2. Since we need to find the third, fourth and fifth term, therefore we will put n as 3, 4 and 5. By substituting n as 3 in this relation, we get A3 is equal to A3 minus 1 minus 1 and this is equal to A2 minus 1, A2 is equal to 2, so we have 2 minus 1 and 2 minus 1 is equal to 1. By substituting n as 4, we get A4 is equal to A4 minus 1 minus 1 and this is equal to A3 minus 1, A3 is equal to 1, so we have 1 minus 1 and 1 minus 1 is equal to 0. By substituting n as 5, we get A5 is equal to A5 minus 1 minus 1, this is equal to A4 minus 1, A4 is equal to 0, so this is equal to 0 minus 1 and 0 minus 1 is equal to minus 1. Hence the required first five terms of the sequence are 2, 2, 1, 0 and minus 1 and the corresponding series is 2 plus 2 plus 1 plus 0 plus minus 1 and so on. This is the required answer, so this completes the session. Bye and take care.