Jawabanmu

2014-03-11T23:32:35+07:00
F(1-x) =  \frac{2x-3}{x+4}
f(1-x) =  \frac{-2(1-x)-1}{-(1-x)+5}
f(x) =  \frac{-2x-1}{-x+5}  
atau =  \frac{-1(2x+1)}{-1(5-x)} =  \frac{2x+1}{5-x}