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July 29, 2015

Homework Help: precalc

Posted by ANON on Sunday, September 30, 2012 at 2:09pm.

f(x)=2+4x-x^2 when x is less than 2

thus f-1(x)=2-sqrt(-x+6)

i need to show that f(f-1(x))=x, but i keep getting negative x...any help

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