根据数列极限的定义证明:lim _(narrow infty )dfrac (2n+1)(3n+1)=dfrac (2)(3)

根据数列极限的定义证明:

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根据数列极限的定义证明:lim _(narrow infty )dfrac (3n+1)(2n+1)=dfrac (3)(2) __

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