If $f(x)=x^3-8$, what is $f^{-1}(f(f^{-1}(19)))$?
http://web2.0calc.com/questions/if-f-x-x-3-8-what-is-f-1-f-f-1-19
( If this answer is wrong please say so.... )
ah thanks that worked
+9479 
