 Hello and welcome to the session. Let's discuss the following problem today. Let a is equal to set 1, 2, 3 and b is equal to set 4, 5, 6, 7 and let f is equal to 1, 4, 2, 5 and 3, 6 be a function from a to b. Show that f is 1, 1. Now let us write the solution. Let f be a function from a to b where a is equal to 1, 2, 3 and b is equal to 4, 5, 6, 7 and f is equal to 1, 4, 2, 5 and 3, 6. It is clear from above that f of 1 is equal to 4, f of 2 is equal to 5 and f of 3 is equal to 6. Therefore, we observe that different elements of a have different images in b. Therefore, f is 1, 1. I hope you understood the problem. Bye and have a nice day.