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Limits Continuity And Differentiability

WB JEE 2021

MCQ+1 / -0.252021
মনে কর \({S_n} = {\cot ^{ - 1}}2 + {\cot ^{ - 1}}8 + {\cot ^{ - 1}}18 + {\cot ^{ - 1}}32 + ....\) n তম পদ পর্যন্ত. সেক্ষেত্রে \(\mathop {\lim }\limits_{n \to \infty } {S_n}\) হবে

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