 Hello and welcome to the session, I am Deepika here, let's discuss the question, whether the following form an AP, if they form an AP, find the common difference D and write three more terms, 0.2, 0.22, 0.222 and 0.222 and so on, we know that the given list of terms A1, 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 us use this key idea for the curve question, let's start the solution, now given list of numbers is 0.2, 0.22, 0.222 and 0.222 and so on, now we have A2-A1 is equal to 0.22-0.2 which is equal to 0.02, again A3-A2 is equal to 0.222-0.222 which is equal to 0.002, again A4-A3 is equal to 0.2222-0.222 which is equal to 0.0002, we find that Ak plus 1 minus Ak is not same every time, it is not constant, therefore given list of numbers do not form an AP, answer for the above question is no, 0.2, 0.22, 0.222 do not form an AP, I hope the question is clear to you, bye and have a good day.