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首先判斷定義域.當定義域關於原點對稱時,求出f(-x)如果滿足f(-x)= -f(x),那麼f(x)就是奇函數.如果滿足f(-x)= f(x),那麼f(x)就是偶函數.如果都不滿足,那麼f(x)是非奇非偶函數.
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