1.
已知数列\(\{a_{n}\}\)的首项\(a_{1}=1\),且\(a_{n+1}=2a_{n}+1(n∈N^{*})\)
\((\)Ⅰ\()\)证明数列\(\{a_{n}+1\}\)是等比数列,并求数列\(\{a_{n}\}\)的通项公式;
\((\)Ⅱ\()\)设\(b_{n}=\dfrac{n}{{a}_{n}+1} \),求数列\(\{b_{n}\}\)的前\(n\)项和\(S_{n}\);
\((\)Ⅲ\()\)在条件\((\)Ⅱ\()\)下对任意正整数\(n\),不等式\(S_{n}+\dfrac{n+1}{{2}^{n}} -1 > (-1)^{n}⋅a\)恒成立,求实数\(a\)的取值范围\(.\)