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April 21, 2015

April 21, 2015

Posted by **Latianna** on Thursday, February 9, 2012 at 5:36pm.

- Math -
**Steve**, Thursday, February 9, 2012 at 9:12pmy=f(x), so x=f^-1(y)

y = 4x+12

y-12 = 4x

y/4 - 3 = x

f^-1(y) = y/4 - 3

so, f^-1(x) = x/4 - 3

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