ricayah ricayah

13-01-2015
Mathematics

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if f(x)=9x-8, which of the following is the inverse of f(x)?

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konrad509 konrad509

13-01-2015

[tex]f(x)=9x-8\\ y=9x-8\\ 9x=y+8\\ x=\dfrac{1}{9}y+\dfrac{8}{9}\\ f^{-1}(x)=\dfrac{1}{9}x+\dfrac{8}{9}[/tex]

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Make the subject of 9x = u