and 
the composite function 
is obtained by replacing each occurrence of 
in by 
[M1.3, M4.3]
is: a function obtained through the combination of two or more functions. Given two functions and the composite function is obtained by replacing each occurrence of in by [M1.3, M4.3]
is also called: a function of a function. [M1.3, M4.3]
Copyright 1997, The Open University