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Verified answer
Mapel : MatematikaKelas : 10
Bab : Relasi dan Fungsi
f(x) = x - 2
g(x) = 2/x
→ (f o g) (x)
(f o g) (x) = f(2/x)
(f o g) (x) = 2/x - 2
(f o g) (x) = 2/x - 2x/x
(f o g) (x) = (2 - 2x) /x
Invers fungsi nya adalah :
Misalkan,
(2 - 2x) /x = y
2 - 2x = xy
-2x - xy = -2
2x + xy = 2
x(2 + y) = 2
x = 2/(2 + y)
Jadi,
(f o g) -¹(x) = 2/(2 + x)