jika f(x) = x/x - 3 , maka f^-¹(3) adalah... A.¾ B.3/5 C.7/4 D.4/3 E.9/2

[tex]f(x) = \frac{x}{x - 3} \\ {f}^{ - 1} (x) = \frac{3x}{x - 1} \\ {f}^{ - 1} (3) = \frac{3(3)}{(3) - 1} \\ = \frac{9}{2} [/tex]
rumus
[tex] \frac{ax + b}{cx + d} = \frac{ - dx + b}{cx + a} [/tex]
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