A Range of Exactly Two
Difficulty: Medium · Topics: Discrete Mathematics, Functions, Function Combinatorics
Aynan ikki elementli qiymatlar sohasi
How many functions f:\1, 2, 3, 4\→\1, 2, 3, 4, 5\ have a range with exactly two elements?
Nechta f:\1, 2, 3, 4\→\1, 2, 3, 4, 5\ funksiyaning qiymatlar sohasi aynan ikkita elementdan iborat?