檢視周期函数的原始碼

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| style="background: #FF2400" align= center|  '''<big>周期函数</big>'''
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| style="background: #FF2400" align= center|  '''<big></big>'''

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中文名；周期函数

外文名；periodic function

性质；7条

判定定理；5条
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对于函数y=f（x），如果存在一个不为零的常数T，使得当x取[[定义域]]内的每一个值时，f（x+T）=f（x）都成立，那么就把函数y=f（x）叫做'''周期函数'''，不为零的常数T叫做这个函数的[[周期]]。事实上，任何一个常数kT（k∈Z，且k≠0）都是它的周期。并且周期函数f（x）的周期T是与x无关的非零[[常数]]，且周期函数不一定有最小正周期。<ref>[https://wenku.so.com/d/89e039afbbe381134de51facc6f56e61 函数周期公式],360文库 , 2018年4月18日</ref>