Asked by Asher
what is the inverse ƒ(x) = x2 - 9
Answers
Answered by
drwls
The inverse function is what you have to do to f(x) (which I will call y) to get x.
y + 9 = x^2
x = sqrt(y + 9)
Now switch variables and call it the inverse function of f(x)
f^-1(x) = sqrt(x + 9)
y + 9 = x^2
x = sqrt(y + 9)
Now switch variables and call it the inverse function of f(x)
f^-1(x) = sqrt(x + 9)
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