Let f(x)=2ln(x)\displaystyle {f{{\left({x}\right)}}}={2}{\ln{{\left({x}\right)}}}.
Then f(x)\displaystyle {f}'{\left({x}\right)} is  
andf(4)\displaystyle {f}'{\left({4}\right)} is  

f(x)\displaystyle {f}{''}{\left({x}\right)} is  
and f(4)\displaystyle {f}{''}{\left({4}\right)} is