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OpenStudy (anonymous):
Let f(x) = x2 – 81. Find f–1(x).
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OpenStudy (radar):
(-1)2-81 -2-81=-83
OpenStudy (anonymous):
i think that's supposed to say "x squared" not 2x
OpenStudy (radar):
OK I see what you mean. (-1)^2-81 becomes 1-81=80 Does that agree with your thinking?
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