18.奇偶函數(shù)的圖象特征 奇函數(shù)的圖象關(guān)于原點(diǎn)對(duì)稱.偶函數(shù)的圖象關(guān)于y軸對(duì)稱;在對(duì)稱區(qū)間上.奇函數(shù)的單調(diào)性相同.歐函數(shù)相反,如果一個(gè)函數(shù)的圖象關(guān)于原點(diǎn)對(duì)稱.那么這個(gè)函數(shù)是奇函數(shù),如果一個(gè)函數(shù)的圖象關(guān)于y軸對(duì)稱.那么這個(gè)函數(shù)是偶函數(shù).如果一個(gè)奇函數(shù)的定義域包括0.則必有f(0)=0; (1)若函數(shù)是偶函數(shù).則,若函數(shù)是偶函數(shù).則. (2)對(duì)于函數(shù)(),恒成立,則函數(shù)的對(duì)稱軸是函數(shù);兩個(gè)函數(shù)與 的圖象關(guān)于直線對(duì)稱. (3)若,則函數(shù)的圖象關(guān)于點(diǎn)對(duì)稱; 若,則函數(shù)為周期為的周期函數(shù). 查看更多

 

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奇函數(shù)和偶函數(shù)的圖象有何特征?

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