tentukan x jika ( f invers o g invers ) (x) = 1

F (x) =y
x + 2 = y
x = y -2
f invers (x) = x - 2

g (x) = y
15/x = y
x.y = 15
x = 15/y
g invers (x) = 15/x

( F invers o G invers ) (x)
f invers x ( g invers x)
f invers (15/x)
15/x - 2 =

tinggal di samadengankan hasil nanti ketemu nilai x,,