數據之美

[OC]通過每個奇數分數的交替加減來計算π。所以1/1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11+...
[OC] Calculating pi by alternating adding and subtracting every odd number fraction. So 1/1 - 1/3 + 1/5 - 1/7 +1/9 -1/11+...
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