If f(x)=7+3x+6x2\displaystyle {f{{\left({x}\right)}}}={7}+{\frac{{{3}}}{{{x}}}}+{\frac{{{6}}}{{{x}^{{2}}}}}, find f(x)\displaystyle {f}'{\left({x}\right)}.
 

Find f(2)\displaystyle {f}'{\left({2}\right)}.
 

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

Find f(2)\displaystyle {f}{''}{\left({2}\right)}.