Question 1059199
Note that {{{ f^-1(x) }}} means inverse function (not 1/f(x))

let's say  y = f(x) = 5x

Then {{{ f^-1(x) }}} means "find x in terms of y"

So:
  {{{ x = y/5 }}}
  {{{ f^-1(x) = y/5 = f(x)/5 }}}