Jawapan

2016-03-19T13:09:04+08:00
You could subsitute g(x) for x in f(x) and if you get x as a result, then that is indeed the inverse

ex
if 
f(x)=x-2
the inverse which is g(x) is
g(x)=x+2 because if you did 
f(g(x)) then you would get
f(g(x))=(2+x)-2=2-2+x=x