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Sagot :

Réponse :

Bjr

Explications étape par étape :

3^n/3^n+1 = 1/ (1+(1/3)^n))

1/(1+(1/3)^n)) = 1/(1+(1/(3^n))

= 1/((3^n/3^n) + (1/3^n)

= 1/ ((3^n+1)/(3^n))

= 1 * (3^n/3^n + 1)

= 3^n/ 3^n+1

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