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[函数] 如何说明什么时候面积最大

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word3000 posted 2016-10-25 10:44 |Read mode

要在一块圆心角为120°，半径为1的扇形纸片中截出一块矩形，则该矩形面积的最大值是

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original poster word3000 posted 2016-10-26 06:29

请教各位了！！

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2025-7-15 13:51 GMT+8

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