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f(x) = 1/x, g(x) = 2x -1
(f o g)(x) = f(g(x)) = f(2x -1)
= 1/(2x-1)
Selanjutnya kita cari invers fog.
Misal
y = 1/(2x -1)
2xy - y = 1
2xy = 1 + y
x = (1+y)/2y
jadi invers fog yaitu
(f o g)^-1(x) = (1+x)/2x
Semoga membantu dan mudah dipahami
#FunWithMath