Question 1021063
If {{{f^(-1)(-2)= -3}}}, then it should be that f(-3) = -2 by a direct application of f on both sides.

==> f(-3) = k(2-3) = -k after substituting x = -3 into f(x) = k(2+x)
==> -k = -2
==> {{{highlight(k = 2)}}}.