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Sagot :

Bonjour,

On remarque :

1+2+2²+2³+2⁴+2⁵... 2⁹ = 2⁰ + 2¹ + 2² +2³+2⁴+2⁵...2⁹

Donc :

[tex]\sum \limits_{\underset{}{i = 0}}^92 {}^{n} = 1023[/tex]

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