lim 1/n(sinπ/n+sin2π/n+.+sinnπ/n) n 趋向于正无穷

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lim1/n(sinπ/n+sin2π/n+.+sinnπ/n)n趋向于正无穷lim1/n(sinπ/n+sin2π/n+.+sinnπ/n)n趋向于正无穷lim1/n(sinπ/n+sin2π/n+

lim 1/n(sinπ/n+sin2π/n+.+sinnπ/n) n 趋向于正无穷
lim 1/n(sinπ/n+sin2π/n+.+sinnπ/n) n 趋向于正无穷

lim 1/n(sinπ/n+sin2π/n+.+sinnπ/n) n 趋向于正无穷
见图片

cosπ/n(sinπ/n+sin2π/n+.+sinnπ/n)=1/2(sin0+sin2π/n+sinlim 1/n(sinπ/n+sin2π/n+.+sinnπ/n)=limM/n=cos(π/2n)/[n