[分析] 初微(1) (C. N. Apostol)

[plover (>//////<)]

                                    x_1 + .. +x_n
Let  lim  x_n = a, show that  lim  --------------- = a,
    n->∞                    n->∞        n

where a can be finite or infinite.


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推 yonex:請問這五題都是Apostal的嗎?