（08年长沙一中一模）已知且函数为的导函数，若为奇函数，则

（08年长沙一中一模）已知

且函数

为

的导函数，若

为奇函数，则

答案

答案：

解析：

令

，

为奇函数，

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（08年长沙一中一模）已知且函数为的导函数，若为奇函数，则

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