Respuesta :

f=5 and x stands for itself so it should be 5-1(x) which equals 4x

You can say f(x) = 5x is the same as saying y = 5x  to find f^-1 you need to 1st switch the x and y and solve for y

x = 5y
y = [tex] \frac{1}{5} x[/tex] = [tex] f^{-1} (x)[/tex]
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