Decide Whether the Composite Functions, F ° G and G $$f ( x ) = 2 x , \quad g ( x ) = \frac { x } { 2 }$$

Multiple Choice

Decide whether the composite functions, f ° g and g ° f, are equal to x.
- $$f ( x ) = 2 x , \quad g ( x ) = \frac { x } { 2 }$$

A) No, no
B) No, yes
C) Yes, no
D) Yes, yes