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The author generalizes the theorem of Rolle in the calculus from closed interval to semi-infinite interval and infinite interval , which is useful for students to understand theorem of Rolle better. 本文將微積分中的羅爾定理從有限閉區(qū)間推廣到了半無(wú)限區(qū)間和無(wú)限區(qū)間，有助于對(duì)羅爾中值定理的理解。