3.
当\(n\in {{N}^{*}}\)时,\({{S}_{n}}=1-\dfrac{1}{2}+\dfrac{1}{3}-\dfrac{1}{4}+\cdot \cdot \cdot +\dfrac{1}{2n-1}-\dfrac{1}{2n}\),\({{T}_{n}}=\dfrac{1}{n+1}+\dfrac{1}{n+2}+\dfrac{1}{n+3}+\cdot \cdot \cdot +\dfrac{1}{2n}\),
\((\)Ⅰ\()\)求\({{S}_{1}},{{S}_{2}},{{T}_{1}},{{T}_{2}}\);
\((\)Ⅱ\()\)猜想\({{S}_{n}}\)与\({{T}_{n}}\)的关系,并用数学归纳法证明.