两个周期函数相加或相减后仍是周期函数,那要是两个周期函数相乘后是不是周期函数,请举例说明!
人气:152 ℃ 时间:2020-02-03 04:30:23
解答
当然是周期函数了,其有一个周期是两个函数周期的最小公倍数sure
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