x^2y^2+(x^2-1)^2=R^2y^2, y can't be 0

jinjing · 2010-04-23 16:09:19Z

x^2*y^2+(x^2-1)^2=R^2*y^2, y can't be 0簡介

來源: jinjing 於 2010-04-23 16:09:19 [檔案] [舊帖] [給我悄悄話] 閱讀數 : (0 bytes)

本帖於 2010-04-30 08:34:50 時間, 由版主於德利編輯

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