 Hi and welcome to the session. I am Asha and I am going to help you with the following question which says if A into 1 upon B plus 1 upon C comma B into 1 upon C plus 1 upon A comma C into 1 upon A plus 1 upon B are in A, B prove that A, B and C are in A, B. So let us now begin with the solution and we are given that A into 1 upon B plus 1 upon C comma B into 1 upon C plus 1 upon A and C into 1 upon A plus 1 upon B are in A, B. So this implies A into 1 upon B plus 1 upon C plus 1 comma B into 1 upon C plus 1 upon A plus 1 comma C into 1 upon A plus 1 upon B plus 1 are in A, B which can further be written as A into 1 upon B plus 1 upon C plus 1 upon A B into 1 upon C plus 1 upon A plus 1 upon B plus C into comma 1 upon A plus 1 upon B plus 1 upon C are in A into 1 upon B plus 1 upon C plus 1 can be written as A upon A. So taking A comma from both the terms it can be written as A into 1 upon B plus 1 upon C plus 1 upon A. Now dividing these three terms by 1 upon A plus 1 upon B plus 1 upon C implies that A, B and C are in thus we have proved that and C are in A, B. So this completes the session. Take care and have a good day.