(ex17)连续周期函数f(x)在[a, b]上(周期T=2L=b-a)的Fourier级数展开式为 其中Fourier系数 试编程求Fourier系数,并利用该程序求函数 y = x(x-p)( x-2p)在[0,2p]上的Fourier级数展开式前7项。
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