Sigh...calculus is giving me a hard time...Trig was much easier. Anyone recommend a good calculus book to help me put things in perspective? Anyways, I need help with differentiating the following log functions:

1. $\displaystyle f(x)=\sqrt{x} lnx$

2. $\displaystyle f(u)=\frac{lnu}{1+ln(2u)}$

thanks