L18 利用圖形凹性和反曲點作圖 5.2 The definite integral of a continous function (連續函數定積分) Upper sum and Lower sum (上和與下和) If f and g are concave down on I, then f+g is concave down on I. 一開始從圖形研究,是動機。圖形看到的現象被定義成 ...
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