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Hunter-Best [27]
3 years ago
8

Which function below is the inverse of f(x) = x^2-9

Mathematics
1 answer:
USPshnik [31]3 years ago
5 0
To find the inverse
replace f(x) with y
switch all x and y
solve for y
replace y with f⁻¹(x)

f(x)=x^2-9
y=x^2-9
x=y^2-9
x+9=y^2
sqrt both sides
\sqrt{x+9}
replace
f⁻¹(x)=\sqrt{x+9}

that is the inverse
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