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If f(x)=x^2-1, what is the equation for f^-1(x)
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4 votes
If f(x)=x^2-1, what is the equation for f^-1(x)

User Kaustubh Jha
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1 Answer

3 votes
Let y = x^2 - 1
x^2 = y + 1

x = sqrt(y + 1)

so f^-1(x) = sqrt (x + 1) (answer)
User Ben Schwabe
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