BrandonXD BrandonXD

14-07-2016
Mathematics

contestada

Write the inverse function for the function, ƒ(x) = x + 4. Then, find the value of ƒ -1(4). Type your answers in the box.

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apologiabiology apologiabiology

14-07-2016

easy
switch f(x) and x
solve for f(x)
replace f(x) with f⁻¹(x)

switch

x=f(x)+4
minus 4 boh sides
x-4=f(x)
replace
f⁻¹(x)=x-4

f⁻¹(4)=x-4
f⁻¹(4)=4-4
f⁻¹(4)=0

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