Given f(x)=5x2+20x+26\displaystyle {f{{\left({x}\right)}}}={5}{x}^{{2}}+{20}{x}+{26},     2x6\displaystyle -{2}\le{x}\le{6}.

Identify the Domain and Range of f1(x)\displaystyle {{f}^{{-{{1}}}}{\left({x}\right)}}