okokjade
okokjade okokjade
  • 03-01-2019
  • Mathematics
contestada

f(x) = 4x - 8

what is the value of f^-1(-2)?

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gmany
gmany gmany
  • 09-01-2019

[tex]If\ f(x)=y,\ then\ f^{-1}(y)=x.\\\\f(x)=4x-8\to4x-8=-2\qquad\text{add 8 to both sides}\\\\4x=6\qquad\text{divide both sides by 4}\\\\x=\dfrac{6}{4}\\\\x=\dfrac{3}{2}\\\\Answer:\ \boxed{f^{-1}(-2)=\dfrac{3}{2}}[/tex]

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