When f ∘ f Is Constant
Difficulty: Hard · Topics: Discrete Mathematics, Functions, Function Combinatorics
f ∘ f o‘zgarmas bo‘lganda
Let X=\1, 2, 3, 4\. How many functions f:X→ X make f° f a constant function?
X=\1, 2, 3, 4\ bo‘lsin. Nechta f:X→ X funksiyada f° f o‘zgarmas funksiya bo‘ladi?