 Hello and welcome to the session. I am Deepika here. Let's discuss the question. The question says whether the following list of numbers form an AP, if they form an AP, find the common difference D and write 3 more terms. Minus 1.2, minus 3.2, minus 5.2, minus 7.2 and so on. We know that a list of numbers even A2, A3, so on, forms an AP if the difference of a term and its preceding term is always constant. This constant is called the common difference of AP. Let's start the solution. Solution. Our given list of numbers is minus 1 by 2, minus 3.2, minus 5.2, minus 7.2 and so on. We have A2 minus A1 is equal to minus 3.2, minus of minus 1.2, which is equal to minus 2. A3 minus A2 is equal to minus 5.2, minus minus of 3.2, which is equal to minus 2. Again, A4 minus A3 is equal to minus 7.2, minus, minus of 5.2, which is again equal to minus 2. That is, AK plus 1 minus AK is the same every time, that is, it is constant. Therefore, the given list of numbers forms an AP with common difference, D is equal to minus 2. The next two terms are, the next three terms are, 0.2 plus minus 2, which is equal to minus 9.2, minus 9.2 plus minus 2, which is equal to minus 11.2 and minus 11.2 plus minus 2 is equal to minus 13.2. Hence our answer for the above given list of numbers is yes. The form an AP with common difference D is equal to minus 2 and the next three terms are minus 9.2 minus 11.2 and minus 13.2. This is our answer. I hope the question is clear to you. Bye and have a good day.