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