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定積分的定義:設一元函數y=f(x),在區間(a,b)內有定義.將區間(a,b)分成n個社區間(a,x0)(x0,x1)(x1,x2).(xi,b).設△xi=xi-x(i-1),取區間△xi中曲線上任意一點記做f(ξi),做和式:和式若記λ為這些社區…
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