JEE Main 2021 Mathematics question
Let A = {0, 1, 2, 3, 4, 5, 6, 7}. Then the number of bijective functions f : A A such that f(1) + f(2) = 3 – f(3) is equal to
Answer: 720
Let A = {0, 1, 2, 3, 4, 5, 6, 7}. Then the number of bijective functions f : A A such that f(1) + f(2) = 3 – f(3) is equal to