 Hi and welcome to the session. I am Deepika here. Let's discuss the question which says write first four terms of the EP When the first term A and the common difference D are given as follows A is equal to minus 1 and D is equal to 1 by 2. So let's start the solution given A is equal to minus 1 and D is equal to 1 by 2 now we know that if A is the first term D is the common difference then 3d so on is an Arithmetic progression therefore, R e is equal to minus 1 minus 1 minus 1 plus D, which is 1 by 2 minus 1 plus 2 into D that is 1 by 2 minus 1 plus 3 into 1 by 2 So on is an arithmetic progression therefore minus 1 minus 1 by 2 0 1 by 2 Are the first four terms of the EP. Hence the answer for the above question is minus 1 minus 1 by 2 0 and 1 by 2 are the first four terms of the EP. I hope the solution is clear to you. Bye and take care