Question 1205243
.



                    It can be solved in two lines:



Line  1 :    First calculate   g(18) = {{{sqrt(18-2)}}} = {{{sqrt(16)}}} = 4.


Line &nbsp;2 :  &nbsp;&nbsp;Next calculate  &nbsp;&nbsp;(fog)(18) = f(g(18)) = f(4) = {{{1/(4-5)}}} = {{{1/(-1)}}} = -1.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<U>ANSWER</U>



&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Done, &nbsp;complete, &nbsp;solved.