olemus
funktsioonidele \(f_1, \ldots, f_n\) vastav
funktsioon \(f_1\circ \ldots \circ f_n\),
kus
\((f_1\circ \ldots \circ f_n)(x) = f_1(f_2( \ldots (f_n(x))\ldots) ) \)
=
a combination of two or more functions in a manner where the output from one function becomes the input for the next function

ülevaateid
https://en.wikipedia.org/wiki/Function_composition

https://www.mathsisfun.com/sets/functions-composition.html

https://mathbitsnotebook.com/Algebra2/Functions/FNComposition.html

https://www.cuemath.com/calculus/composite-funtions/