/sci/ - Science & Math

>>	Anonymous Mon Mar 30 18:10:27 2020 No.11516336 [View] File: 209 KB, 456x502, __fujiwara_no_mokou_touhou_drawn_by_shangguan_feiying__58a45ebea00e417c52e7b03bc9ea62d0.jpg [View same] [iqdb] [saucenao] [google] >>11513066 Holy based.

Anonymous Sat Mar 28 22:04:37 2020 No.11511012 [View]
File: 209 KB, 456x502, __fujiwara_no_mokou_touhou_drawn_by_shangguan_feiying__58a45ebea00e417c52e7b03bc9ea62d0.jpg [View same] [iqdb] [saucenao] [google]

>>11510991
Pretty sure you're supposed to conjecture and prove that [math]A*B*C = \{ x \in A \cup B \cup C ~ : ~ \text{x is not in two of} ~ A, ~ B, ~ C. \}[/math].
Definition could be wrong, tho.

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/sci/ - Science & Math

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