Question 1139626


 the inverse of {{{F^-1(3)}}} is {{{(1/F)3=3/F}}}
 the inverse of {{{F^-1(8)}}} is {{{(1/F)8=8/F}}}
  the inverse of ({{{3}}},{{{1}}}) is ({{{1}}},{{{ 3}}})
  the inverse of ({{{8}}},{{{8}}})  is ({{{8}}},{{{8}}})