[積分] 變數變換
∫ (r^2-2rRcosθ+R^2)^-1/2 d(cosθ)
怎麼轉都不對= =
勞請各位大大指點...
感謝~
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※ 編輯: jamalmit 來自: 140.112.244.122 (10/22 02:40)
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