高数傅里叶级数问题求解答过程 如图,第6题

2025-05-08 00:29:32
推荐回答(1个)
回答1:

S(x)是2π为周期的函数,S(3π/2)=S(3π/2-2π)=S(-π/2),f(x)在x=-π/2点连续,由狄里克莱判别法知,S(x)在x=-π/2处收敛于f(x),即S(-π/2)=-π/2