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51问答网 > 为什么是三倍的，定积分可加性证明

为什么是三倍的，定积分可加性证明

2025-03-15 07:35:08

推荐回答（1个）

回答1：

很简单，把那个差距写出来，设c放在(xi,xi+1)中，差即
Ⅰf(xi+1)入-(f(xi+1)入1+f(c)入2)丨≤ Ⅰf(xi+1)入|+|(f(xi+1)入1|+|f(c)入2)丨≤3入M

其中入1+入2=入

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