If set of all possible values of $$k$$ for which every solution of the inequality $${ x }^{ 2 }-(3k-1)x+2k^{ 2 }-3k-2\ge 0$$ is also a solution of the inequality $${ x }^{ 2 }-1\ge 0$$ are $$[l,m]$$, then find the value of $$l+m$$.