共50条信息
数列\(\left\{{a}_{n}\right\} \)的前\(n\)项和为\(S_{n}\),若\({S}_{n}=2n-1\left(n∈{N}_{+}\right) \),则\(a_{2017}\)的值为\((\) \()\)
已知数列\(\left\{ {{a}_{n}} \right\}\)中,\({{a}_{1}}=2\),\({{a}_{n}}=1-\dfrac{1}{{{a}_{n-1}}}(n\geqslant 2)\),则\({{a}_{2017}}\)等于\((\) \()\)
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