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27-05-2018
Mathematics

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if f(x) = 9x+1, find f^-1 (f(3))

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Аноним Аноним

27-05-2018

f(3) = 9(3) + 1 = 28

f-1(x) = (x - 1)/9

so f^-1 (f(3)) = (28-1) / 9 = 3 (answer)

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