問題詳情
6.函數f (x)＝x2＋2x與直線y＝0、x＝0、x＝1所圍成之區域為R，把區間〔0 , 1〕分割成n等分，令Un表區域R之上黎曼和、Ln表下黎曼和。則
(1) Un＝?，
(1) Un＝?，
參考答案
答案：D
難度：簡單0.815068
統計：A(2),B(1),C(19),D(238),E(0)
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