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Question Number 104890 by Ar Brandon last updated on 24/Jul/20

lim_(n→∞) (1/n)Σ_(k=1) ^n [1+(k^3 /n^3 )]^(−(1/2))

$$\underset{\mathrm{n}\rightarrow\infty} {\mathrm{lim}}\frac{\mathrm{1}}{\mathrm{n}}\underset{\mathrm{k}=\mathrm{1}} {\overset{\mathrm{n}} {\sum}}\left[\mathrm{1}+\frac{\mathrm{k}^{\mathrm{3}} }{\mathrm{n}^{\mathrm{3}} }\right]^{−\frac{\mathrm{1}}{\mathrm{2}}} \\ $$

Answered by abdomathmax last updated on 24/Jul/20

=∫_0 ^1  (dx/(√(1+x^3 )))  but tbis integral is elliptic...!

$$=\int_{\mathrm{0}} ^{\mathrm{1}} \:\frac{\mathrm{dx}}{\sqrt{\mathrm{1}+\mathrm{x}^{\mathrm{3}} }}\:\:\mathrm{but}\:\mathrm{tbis}\:\mathrm{integral}\:\mathrm{is}\:\mathrm{elliptic}...! \\ $$

Commented by Ar Brandon last updated on 24/Jul/20

So, no solution, Sir ? ��

Commented by mathmax by abdo last updated on 24/Jul/20

perhaps we can find a way...

$$\mathrm{perhaps}\:\mathrm{we}\:\mathrm{can}\:\mathrm{find}\:\mathrm{a}\:\mathrm{way}... \\ $$

Commented by Ar Brandon last updated on 24/Jul/20

Alright, cool

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