If f(x)=6+6x+6x2\displaystyle {f{{\left({x}\right)}}}={6}+{\frac{{{6}}}{{{x}}}}+{\frac{{{6}}}{{{x}^{{2}}}}}, find f(x)\displaystyle {f}'{\left({x}\right)}.
 

Find f(3)\displaystyle {f}'{\left({3}\right)}.
 

Find f(x)\displaystyle {f}{''}{\left({x}\right)}.
 

Find f(3)\displaystyle {f}{''}{\left({3}\right)}.