[代數] 請教一題級數和

[expert (神~~)]

          1/A = 1/9955 + 1/9956 + ...... + 1/9960


          求 √A 之值 ?

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推 WalterbyJeff:A＝10^6/√6~40.825 事實上A＝40.738 by mathematica
推 gj942l41l4  :夾一下大概可知A在9954/6=1659和9960/6=1660間
→ gj942l41l4  :手開一下根號大概知道在40.73、40.74附近