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OpenStudy (anonymous):
please dont solve help on the first step: Let f(x) = x2 – 81. Find f–1(x).
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OpenStudy (anonymous):
y = x^2 - 81 x = y^2 - 81 plus/minus sqrt(x + 81) = y
OpenStudy (anonymous):
\[ f^{-1} = \pm \sqrt{x+81}\]
OpenStudy (anonymous):
the answer is: f^1=+-√x+81
OpenStudy (anonymous):
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