笔迹: "A visual proof why 1+3+5+...+(2n-1)=n² ⚪⚫⚪⚫⚪⚫ ⚫⚫…" - CleverLibre Social

笔迹 @note@social.cleverlibre.org

A visual proof why 1+3+5+...+(2n-1)=n²

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⚫⚫⚫⚫⚫⚫ https://twitter.com/fermatslibrary/status/1215986721902473216

https://t.me/private_channel_c14370a/3393

Jan 17, 2020, 11:52 · · IFTTT · · ·

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