Jawabanmu

2014-03-02T20:43:45+07:00
(fog)(x) = ( \sqrt{x} -3)^2-5

y=( \sqrt{x} -3)^2-5
 \sqrt{y+5} = \sqrt{x} -3
( \sqrt{y+5}+3)^{2} =x

(fog)^-1(x)=( \sqrt{x+5}+3)^{2}
25=( \sqrt{x+5}+3)^{2}
5=( \sqrt{x+5}+3)
2=\sqrt{x+5}
x= -1