Question: Consider the function twice f x = f ( f x ) What constraints does twice place on the type that input ( function )

Consider the function
twice fx=f(fx)
What constraints does twice place on the type that input (function)f can have? Hint: try seeing what happens when calling twice head 1,2,3 in GHCi.
Consider the function twice fx=f(fx) What constraints does twice place on

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