7.
古埃及数学中有一个独特现象:除\( \dfrac {2}{3}\)用一个单独的符号表示以外,其他分数都要写成若干个单位分数和的形式\(.\)例如\( \dfrac {2}{5}= \dfrac {1}{3}+ \dfrac {1}{15}\),可以这样来理解:假定有两个面包,要平均分给\(5\)个人,每人\( \dfrac {1}{2}\)不够,每人\( \dfrac {1}{3}\)余\( \dfrac {1}{3}\),再将这\( \dfrac {1}{3}\)分成\(5\)份,每人得\( \dfrac {1}{15}\),这样每人分得\( \dfrac {1}{3}+ \dfrac {1}{15}.\)形如\( \dfrac {2}{n}(n=5,7,9,11,…)\)的分数的分解:\( \dfrac {2}{5}= \dfrac {1}{3}+ \dfrac {1}{15}\),\( \dfrac {2}{7}= \dfrac {1}{4}+ \dfrac {1}{28}\),\( \dfrac {2}{9}= \dfrac {1}{5}+ \dfrac {1}{45}\),\(…\),按此规律,则\((1) \dfrac {2}{11}=\) ______ \(.(2) \dfrac {2}{n}=\) ______ \(.(n=5,7,9,11,…)\)