4.
设集合\(A\),\(B\)均为实数集\(R\)的子集,记\(A+B=\{a+b|a∈A,b∈B\}\).
\((1)\)已知\(A=\{0,1,2\}\),\(B=\{-1,3\}\),试用列举法表示\(A+B\);
\((2)\)设\(a_{1}= \dfrac {2}{3}\),当\(n∈N^{*}\)且\(n\geqslant 2\)时,曲线\( \dfrac {x^{2}}{n^{2}-n+1}+ \dfrac {y^{2}}{1-n}= \dfrac {1}{9}\)的焦距为\(a_{n}\),如果\(A=\{a_{1},a_{2},…,a_{n}\}\),\(B=\{- \dfrac {1}{9},- \dfrac {2}{9},- \dfrac {2}{3}\}\),设\(A+B\)中的所有元素之和为\(S_{n}\),求\(S_{n}\)的值;
\((3)\)在\((2)\)的条件下,对于满足\(m+n=3k\),且\(m\neq n\)的任意正整数\(m\),\(n\),\(k\),不等式\(S_{m}+S_{n}-λS_{k} > 0\)恒成立,求实数\(λ\)的最大值.