K kangarulz Procrastinaton Joined Mar 23, 2005 Messages 144 Gender Female HSC 2006 Jun 17, 2006 #1 need help with differentiating: ln (x/x+1)
J jake2.0 . . . Joined Sep 17, 2005 Messages 616 Gender Male HSC 2005 Jun 17, 2006 #2 Use log rules: fx=ln(x/x+1) = lnx - ln(x+1) f'x = 1/x - 1/(x+1)
P pLuvia Guest Jun 17, 2006 #3 Remember the general formula for differentiating logs f(x)=log[g(x)] f'(x)=g'(x)/g(x)