Jawabanmu

2014-04-28T14:14:29+07:00
F(x)=3/x+1 
misal u=3,u'=0
         v=x+1, v'=1
f'(x)=(u'v-v'u)/v^2=0(x+1)-(1.3)/(x+1)^2=-3/(x+1)^2
f'(3)=-3/(3+1)^2=-3/4^2=-3/16