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Series
14. Sequences & Series / Series / 문제 2
문제 2

Evaluate the infinite series: m=0(tan1(m+3)tan1(m+1)) \(\displaystyle\) \(\sum\)_{m=0}^{\(\infty\)} \(\left\)( \(\tan\)^{-1}(m+3) - \(\tan\)^{-1}(m+1) \(\right\)) .